®
MMZ 2254, 2554, 2560
25Horsepower
HydrostaticZero-Turn
CommercialRiding
Mower
OPERATOR’S AND SERVICE MANUAL
FORWARD
The MMZ Gasoline Powered Hydraulic Driven Rotary Mowers were developed to
provide superb maneuverability, mid-mount cutting capability for professional land-
scapers, commercial lawn service companies, professional turf managers and golf
course superintendents. The machine incorporates many safety features that
should be studied by all operators and maintenance personnel before use. The list
of safety precautions should receive particular attention.
This manual presents all of the operating and maintenance instructions necessary
to keep your mower at peak efficiency. If properly operated and maintained, your
mower will give dependable service.
CAUTION:
Only thoroughly trained persons should operate
and maintain this mower. This machine can cause
serious injury to anyone who misuses it and does
not understand its operation. For their personal
safety, all operators and maintenance personnel are
required to read this entire manual before operating
the mower.
Hazard control and accident prevention are partially
dependent upon the design and configuration of
the equipment. Notwithstanding, these factors are
also dependent upon the awareness, concern, pru-
dence and proper training of the personnel involved
in the operation, transport, maintenance and stor-
age of the equipment.
3
SAFETY PRECAUTIONS
A. General
1. Read this Operator’s Manual before starting the mower. Study the
controls and learn the proper sequence of operation.
2. Do not allow anyone to operate or maintain this machine who has
not read this manual. Never permit children to operate this
machine.
3. Never carry passengers.
4. Do not remove any shields, guards or safety devices. If a shield,
guard or safety device is damaged or does not function, repair or
replace it before operating the mower.
5. Always wear safety glasses and safety shoes when operating or
maintaining this mower. Do not wear loose-fitting clothing.
6. Disconnect the spark plug wires or remove the key from the ignition
to prevent the engine from accidentally starting before performing
any maintenance on this mower.
7. Never run the engine indoors without adequate ventilation.
Exhaust fumes are deadly.
8. To avoid serious burns, do not touch the engine, exhaust pipe or
muffler while the engine is running or until it has cooled after it has
been shut off.
9. The liquid in the battery is dilute sulfuric acid. Always wear safety
glasses and rubber gloves when working on the battery. Do not
overfill the battery.
10. Lead-acid batteries generate hydrogen and oxygen gases which
form an explosive mixture. Keep sparks and flames away at all
times.
11. When looking for oil leaks, never run your hand over hydraulic
hoses, lines or fittings. Never tighten or adjust hydraulic hoses,
lines or fittings while the system is under pressure. If high-pressure
oil penetrates the skin, the oil must be removed within a few hours
by a doctor familiar with this form of injury or serious complications
may result.
B. Related to Fuel
1. Fuel is highly flammable. Please respect it.
2. Do not smoke or permit others to smoke while handling fuel.
3. Always use approved containers for fuel.
4. Always shut off the engine and permit it to cool before removing
the fuel tank cap.
5. Always fill the fuel tank outdoors.
6. If the fuel container spout will not fit inside the fuel tank opening,
use a funnel.
4
7. When filling the fuel tank, stop when the fuel reaches one inch from the
top. This space is necessary for tank expansion. Do not overfill
.
8. Wipe up any spilled fuel.
C. When Mowing
1. Keep adults, children and pets away from the area to be mowed.
2. When operating this mower in the forward direction, DO NOT allow
the steering levers to return to the neutral position on their own.
Always maintain a firm grip on the levers, operate them smoothly
and avoid any sudden movements of the levers when starting or
stopping.
3. If the mower is equipped for side discharge, never use the mower
without the discharge chute installed and placed in the down posi-
tion.
4. Always remove debris and other objects from the area to be
mowed.(Note: debris and loose grass will reduce traction.)
5. Mow only in daylight.
6. Watch for holes, sprinkler heads and other hidden hazards.
7. Avoid driving too close to trees, creeks, ditches, sand traps and
other obstacles.
8. Before backing up, check behind you and watch where you’re
going.
9. Always reduce speed when making a turn, and when grass is wet.
10. Always mow up and down slopes, never across the slope. Do not
operate on steep slopes and slow down before turning.
11. Be careful when crossing gravel paths or roadways. Always turn off
the blade clutch switch and wait until the blades stop rotating and
raise the cutting deck to the transport position. Always allow other
vehicles to have the right-of-way.
12. If you hit a solid object while mowing, turn off the blade clutch
switch, place the left and right steering levers in the neutral,
opened-out position, move the throttle to slow, set the parking
brake, shut off the engine and take the key from the ignition switch.
Inspect for damage. Repair any damage. Make sure the blades are
in good condition and that the blade bolts are tight before restarting
the engine.
13. Never leave the mower unattended without: turning off the blade
clutch switch; placing the left and right steering levers in the neutral
opened-out position; moving the throttle to slow; setting the parking
5
brake; shutting off the engine and taking the key from the ignition
switch.
14. Never walk or stand on the discharge side of a mower with the
engine running. Turn off the blade clutch switch if another person
approaches while you are operating the mower.
15. Never attempt to operate the traction unit without the mowing deck
attached.
16. Keep the mower and especially the engine and hydraulic compo-
nents clean and free of grease, grass and leaves to reduce the
chance of fire and to permit proper cooling.
SPECIFICATIONS
Engine:
22 HP, 25 HP Kohler
Vertical, Air V-Twin cooled
Dual Element
Type:
Air Cleaner:
Lube System:
Starter:
Pressurized with oil filter
12-volt electric
Traction Drive:
Engine to two variable-speed hydraulic pump/motor BDR
units to gearbox on each drive wheel
Hydraulic Tank:
Cutter Deck;Drive:
Clutch:
2.0-gallon capacity, One quart filter, and oil cooler
54", 60", Belt Driven
Electric
Deck Lift:
Hand lever w/pin lock for height adjustment
1-1/2" to 5-1/2"
Cutting Height:
No. of Blades
Controls:
3, belt-driven, power take-off from engine
Engine ignition and start switch; throttle; choke; left and
right steering levers; electric blade clutch switch; parking
brake; mower deck lift
Parking Brake:
Internal, mechanical linkage attached to the brake handle
Front Caster Wheels: 13x5 - 6
Tire Pressure:
Drive Wheels:
Frame:
10 psi Rear, 12 psi front caster
w/54"-60" deck, 24x12 - 12
2” Steel square tube and plate, all welded construction
Milsco Adjustable seat with armrests. 5" Adjustment
Two 5 gallon w/individual shutoff valves
Seat:
Fuel Tank:
Ground Speed:
Instrumentation
Net Weight:
0-8.6 + MPH forward. 0-4.3 MPH reverse
Hour meter, Tachometer, Maintenance-minder
980 lbs. w/54" deck and 1020 lbs. w/60" deck
6
OPERATING INSTRUCTIONS
Figure. 1
Figure. 2
Engine throttle
Choke Lever
Electric Blade
Clutch
Tach and Hour Meter
Ignition Switch
A. Controls
1. Engine Ignition and Start Switch: (See Figure 1.) Located on the
instrument housing below the right side of the operator’s seat.
When the key is inserted and turned clockwise, 45 degrees, the
ignition circuit is closed. Turning the switch further against spring
pressure starts the engine. The engine will only start if the blade
clutch switch is in the “off” position, the parking brake is engaged
and the left and right steering levers are in the neutral, opened-out
position. The key should always be removed from the switch if the
operator leaves the mower’s seat.
2. Engine Throttle Control: (See Figure 2.) Located on the left side
of the mower next to the operator’s seat. Moving the throttle control
from the rear to the front will increase the engine speed from slow
to fast.
3. Left and Right Steering Levers: (See Figure 3.) These hinged
levers open out to the side in the neutral position to permit the
operator to be seated or to leave the mower’s seat. The operator,
when seated, can pull the levers up to the operating position, a
comfortable forearm’s length away. These levers control all of the
movements of the mower. Pushing both levers forward causes the
mower to move forward. Pulling both levers back causes the
mower to move backward. Pushing one lever ahead of the other
lever causes the traction wheel on the side where the lever is
ahead to rotate faster than the other traction wheel, making the
mower turn toward the side where the lever is behind. When one
lever is pushed forward and the other lever pulled back the same
7
amount, one traction wheel will turn in reverse and the mower will
turn within its own length.
In order to start the engine, both steering levers must be opened
out to the side in the neutral position; the parking brake must be
engaged; and the blade clutch switch must be “off”. However, once
the engine starts, the parking brake must be released before the
operator places the steering levers into the operating position or
the engine will automatically shut off.
Note:
The Steering Lever will return toward neutral when released, but they
should be placed in neutral by the driver. If the Drive Handles are not placed in neutral,
the tractor may creep.
4. Electric Blade Clutch Switch: (See Figure 1.) Located on the
right side of the mower beside the ignition switch. This is an “on/off”
toggle switch that controls the electric blade clutch which supplies
power to the cutting blades through the PTO. The switch must be
turned off to start the engine and should be turned off for safety
any time another person approaches the mower or the mowing
deck is raised to the transport position. Power to the electric clutch
will also be cut off if the operator leaves the operator’s seat.
5. Parking Brake: (See Figure 3.) Located on the left side of the trac-
tion unit. The handle is an overcenter lever which applies the inter-
nal drum-type brake on each drive wheel when the handle is pulled
to the rear. The brake must be engaged in order to start the engine.
6. Deck Lift Handle: (See Figure 3.)
Steering Levers
Deck Lift Handle
Located on the right front corner of
the mowing deck.To raise the mowing
Brake
deck to the transport position, the
lever is pulled to the rear and moved
inward to lock into a stop for trans-
port. To lower the mowing deck, raise
Figure. 3
8
the deck lift handle and move it outward. This allows the handle to
move forward, lowering the deck to the cutting position.
7. Fuel Shutoff Valve: (See Figure 4.)
Located on top of the fuel tank. When
turned in a clockwise direction until it
stops, it will shut off the flow of fuel to
the engine. When turned in a coun-
terclockwise direction it will open and
allow fuel to flow to the engine. Close
this valve if you are not going to run
the mower for a period of 30 minutes
or more to prevent flooding the
engine.
Fuel Shutoff Valve
Figure. 4
8. Seat Adjustment Lever: The Seat
Adjustment Lever is located beneath the seat. The Seat Adjust-
ment Lever is used to move the seat forward and backward. To
place the seat in the desired position pull the seat adjustment lever
to the left then push the seat forward or back to the desired posi-
tion. Release the lever so the seat will lock in place.
9. Digital Tachometer and Hour Meter: (See Figure 1) Located on
the right side of the mower in front of the ignition switch. When the
machine is running the tachometer displays engine rpm. When the
machine is off the tachometer displays running time.
10. Choke Lever: (See Figure 2) The Choke Lever is located on the
left instrument panel next to the seat. The Choke Lever is operated
manually. Having the Choke Lever in the ON position helps the
engine to start during initial start-up. During normal operation the
Choke Lever should be in the OFF position.
Note:
There will be a flashing “LUBE” for each recommended lubrication interval.
There is a flashing “OIL” at each recommended engine oil and filter change.
B. Initial Adjustments
1. Check the fluid levels and tires:
Note:
These checks should be made daily, before starting the engine.
a.
Fuel: Using a good grade of unleaded, regular gasoline (for
a gasoline engine), fill the fuel tank (beside the engine on
the left or right side of the mower). When the fuel reaches
one inch from the top of the tank, stop. DO NOT OVER-
FILL. Space must be left for expansion.
b.
Engine Oil: (Filled at the factory before shipment.) Pull out
the oil dipstick, wipe it off and reinsert it. Pull it out again
and read the oil level. If it is below the operating range, add
9
oil through the fill tube using a funnel to bring it up to the
top of the operating range.
Note:
Gasoline Engine: Use SAE 10W30 or SAE 10W40 engine oil, rated for ser-
vice SJ.
c.
Hydraulic Oil: (Filled at the factory before shipment.) The
hydraulic oil tank is located beneath the operator’s seat.
Always wipe off the area around the oil tank fill neck before
checking the oil level to prevent dirt from contaminating the
oil. Remove the cap and make sure the oil level is up to the
lowest hole on the oil tank fill neck. The top hole is for vent-
ing. If the oil level is low, fill with a good grade of SAE20W-
50 oil.
d.
Tires: 10 psi Rear, 30 psi Front Caster Tires
Note:
New tires are overinflated in order to properly seat the bead to the rim. The
normal working pressure for the traction tires is 8-10 psi. The front caster wheels
should be inflated to 30 psi.
2. Check that all Nuts, Bolts and Screws are Tight.
3. Check the tension of the deck drive belts.
a.
b.
Remove the deck cover
The tension of the deck drive belts are maintained by a
spring mechanism that adjusts for wear and stretch.
Examine the belts for cuts, fraying, and excessive wear.
Replace if any of these are detected.
c.
d.
Replace the deck cover.
4. Adjust the Mowing Deck: The cutting height is set anywhere in
the range of 1-1/2" to 5-1/2". You may need to adjust the mowing
deck to achieve the proper angle for mowing. Follow the proce-
dures below to set the appropriate angle to the mowing deck.
a.
Park the mower on a flat paved surface, engage the parking
brake, shut off the engine, remove the key from the ignition
switch, remove connection of the spark plugs and using the
transport lever, lower the mowing deck into the cutting posi-
tion.
b.
Using a ruler, pencil and paper, measure and note the dis-
tance from the paved surface to the bottom edge of the
mowing blade at the front and the back of the deck on each
side of the mower. (Four dimensions.)
Note:
The front edge of the mowing deck should be 1/8"-1/4" below the rear edge
of the deck so that the blades are cutting grass in only the front half of their circular
path. This decreases friction and reduces the drive power required.
10
c.
If the dimension at the front
of the mowing deck is 1/8"-1/
4" lower than the dimension
at the rear of the deck on
each side of the mower, do
not adjust. If not, you will
need to adjust the Deck Lift
Spring Assist (See Figure 5).
You may also need to adjust
the Deck Links (See Figure
5).
Deck Lift Spring inner bolt
Deck Links
Figure. 5
d.
e.
Lower the mower deck to the
cutting position. With a
wrench loosen the inner rear bolt on the Deck Lift Spring
Assist. To adjust the deck up or down, use a wrench and
with a few turns, adjust clockwise or counter clockwise the
outer rear bolt of the Deck Lift Spring Assist. Repeat this
procedure on the opposite side of the MMZ. Once the deck
is adjusted, retighten bolts.
With the deck still in the cutting position, adjust the Deck
Links. With a wrench loosen the top inner bolt of the Deck
Link. To adjust the side of the deck up or down turn the top
bolt clockwise or counter clockwise a few turns. Adjust both
front and rear Deck links as necessary. Retighten bolts.
Raise the mowing deck to the transport position using the
transport lever.
f.
g.
Use the transport lever to lower the mowing deck to the cut-
ting position and repeat step “b.” above to make sure that
the desired cutting height has been attained. If the dimen-
sions are not correct, repeat steps “c.” through “f.” above.
5. Lubricate all fittings listed in the maintenance section.
C. Break-In And Operation
DANGER:
Reread the “When Mowing” Safety Precautions.
1. Start the Engine:
a.
b.
c.
Open the fuel shutoff valve.
Sit on the Seat. Set the parking brake “On”.
Move the left and right steering levers to the neutral,
opened-out position.
d.
Turn the electric blade clutch switch “Off”.
11
e.
f.
Push the throttle control to a position a third of the way
between slow and fast.
Insert the key in the ignition and start switch and turn the
switch to “On”.
g.
h.
Gasoline Engine: If the engine is cold, push the choke to
the on position.
Turn the ignition key in a clockwise direction to the “Start”
position until the engine starts.
Note:
Do not hold the key in the “Start” position for more than 10 seconds or you
may damage the starter. If the engine does not start in this time, wait about 30 seconds
and try again.
i.
Gasoline Engine: Once the engine starts, push the choke
on halfway and as the engine warms, push the choke off all
the way.
2. Operating the Mower: Operating a zero-turning-radius mower is
not like operating a tractor-type riding mower. The zero-turning-
radius mower is much more maneuverable and much less fatiguing
to operate. However, getting used to the fingertip control of the
zero-turning-radius mower takes some practice. We strongly rec-
ommend that you locate a “test area” where you can operate the
mower for about 30 minutes without being disturbed.
a.
b.
c.
Get into the operator’s seat.
Start the engine.
Use the transport lever to raise the mowing deck to the
transport position. Make sure the blade clutch switch is off.
After the engine has warmed, adjust the throttle to the fast
position.
d.
e.
f.
Release the parking brake.
Fold in the steering levers to the operating position.
WARNING:
When operating this mower forward, do not allow the steering levers
to return to the neutral position on their own. Always maintain a firm
grip on the steering levers, operate them smoothly and avoid any
sudden movements of the levers when starting or stopping.
g.
h.
To go forward, move both steering levers slightly forward
and the mower will slowly move forward. The farther you
move the levers forward the faster the mower will go for-
ward.
To back up, move both steering levers slightly backward
and the mower will slowly move backward. The farther you
move the levers backward the faster the mower will go
backward.
12
i.
To turn, pull the lever back on the side to which you want to
turn. The farther back you pull the lever, the faster and
more sharply you will turn. Initially, you will have to be care-
ful to avoid turning to fast and too far.
j.
After you have mastered operating the mower, use the
transport lever to lower the mowing deck to the cutting posi-
tion and pull on the electric blade clutch switch to start the
blades rotating.
k.
Practice mowing in straight passes. When you feel confi-
dent, slowly practice mowing around obstacles such as
trees.
3. Parking the Mower:
a.
b.
Push off the electric blade clutch switch.
Use the Deck Lift Handle to raise the mowing deck to the
transport position.
c.
d.
e.
f.
Drive the mower to the cleanup or storage area.
Move the throttle to slow.
Place the steering levers in the neutral position.
Set the parking brake.
g.
h.
Turn off the ignition switch and take the key from the switch.
Close the fuel shutoff valves.
MAINTENANCE AND SERVICE
WARNING:
Disconnect the spark plug wires or remove the key from the ignition
to prevent the engine from accidentally starting before performing
any maintenance on this mower.
A. Mower Deck
1. Removing the Mower Deck:
a.
b.
c.
Apply the parking brake. Remove ignition key and both
spark plug caps.
Lower the cutter deck to the ground. Capture the left handle
by placing the height of cut clevis pin above the lift handle.
Remove tension of the PTO belt by moving the belt tension-
ing rod.
Note:
There is a certain amount of spring tension due to the weight of the deck.
When removing the lift linkage from the deck the tension of the springs will go from the
deck to the lift handle. Not capturing the lift handle while removing the lift linkage from
the deck will cause it to snap back.
d.
Detach the engine drive belt.
13
Linch Pins
Linch Pins
Height of Cut Clevis Pin
Figure. 6
e.
Remove six linchpins (See Fig. 6) (4) from the deck and (2)
from the front of the mower. Remove the linchpins on the
left and right rear side of the cutter deck (2); remove the
linchpins on the left and right front side of the cutter deck
(2); and remove the linchpins on the front of the mower (2).
Turn front caster wheels outward.
f.
g.
Shift the deck toward the ignition switch side of the mower
and remove.
h.
To install reverse the process.
2. Changing a Blade:
a.
Jack up the front of the mowing deck about one foot and
block it in that position.
b.
Wrap a rag around one end of the blade and grasp it to pre-
vent it from turning, or secure the blade by placing a block
of wood between the blade and the deck housing.
Use a 1-1/8" socket wrench on the pulley side of the spindle
to secure.
c.
d.
e.
f.
Remove the hex nut using a 1-1/8" wrench.
Remove the hex nut.
To replace the blade reverse the above process and tighten
nut to 100-120 lb ft.
14
WARNING:
Never mow with dull blades! Blades that are bent should be
replaced! The cutting blades are sharp and can cause severe injury.
Wrap the cutting surface of the blade with a rag to avoid injury.
a.
b.
Set the parking brake.
Clean any debris from the blades. Keep blades sharp and
free of build up at all times.
c.
Sharpen blades evenly at the original 30° angle to maintain
balanced cutting blades. Do not sharpen the underside of
the blades. Use a electric blade sharpener, a conventional
electric grinder or a hand file to sharpen the blades.
Replace any blade with severe nicks or dents that cannot
be removed by filing.
Check the balance of the blade after sharpening by placing
it on a blade balancer. Do not use un-balanced blades.
If the blade dips on one end, file stock off of the cutting sur-
face on that end.
d.
e.
f.
Note:
Blades that cannot be easily balanced—REPLACE.
3. Changing the Blade Drive Belts:
a.
b.
c.
Set the parking brake. Remove ignition key and both spark
plug caps.
Unscrew the wing nuts from the deck covers and remove
both covers.
Using a 1/2" socket breaker bar or socket rachet insert the
male end into the 1/2" opening in the lower idler arm
assembly and pull the idler arm clockwise. While holding
the idler arm back, loosen the blade drive belt from the pul-
ley and slide the belt away from the pulley.
Remove tension of the PTO belt by moving the belt tension-
ing rod. Loosen the belt retaining bolt.
Pull the tensioner pulley away from the belt and remove the
PTO belt then remove the blade drive belt.
Reverse the process to install the belt. Be sure the head of
the bolt is above the top of the idler pulley.
d.
e.
f.
Note:
When replacing belts do not overtighten. Adjust the idler pulley so that a
ten-pound pull with a spring scale between two pulleys deflects the belt about 1/2".
15
4. Changing the Spindle
Assembly
a.
Jack up the front of
the mowing deck
about one foot and
block it in that posi-
tion.
Cover
Plate
Spindle
b.
Make sure the blade
clutch is disen-
gaged.
c.
d.
Remove the deck
cover.
Remove the drive
belts. (See 3. Chang-
ing Blade Drive
Belts.)
e.
f.
Remove the cutter
blade. (See 2.
Changing a Blade.)
Using a wrench or socket rachet remove from the cover
plate all six hex nuts, the three carriage bolts and the three
hex head cap screws. For the 52" and 60" decks there will
be four hex head cap screws and four hex nuts.
Remove the spindle assembly.
Figure. 7
d.
B.Hydraulic Oil
WARNING:
Never overfill the hydraulic units. Damage can result if the oil level
is not within the operating range.
Note:
When adding hydraulic oil, do so in small quantities and recheck the oil
level before adding more. It is important that you do not overfill the reservoir.
1. Adding Hydraulic Oil (use SAE20W
50)
a.
b.
c.
Place the MMZ on a level
surface and engage the
parking brake.
Stop the engine and
remove the key from the
ignition switch.
Clean the area around the
Hydraulic Oil fill neck.
Hydraulic Tank
Figure. 8
16
d.
e.
Remove the hydraulic fill cap and check the level. The cor-
rect level is up to the lowest hole of the oil tank fill neck.
Pour hydraulic oil into the reservoir up to the lowest hole in
the oil tank fill neck, if necessary.
2. Draining Hydraulic Oil
Used hydraulic oil must be disposed of properly. Do not pour it down a drain or
sewer, or dump it on open land, this creates an environmental hazard. Please be
aware of the environment when disposing of used oil.
a.
Place the MMZ on a level surface and engage the parking
brake.
b.
c.
d.
e.
f.
Stop the engine and remove the key from the ignition switch.
Remove the mower deck. See Mower Deck on page 13.
Raise the seat forward to expose the hydraulic oil fill point.
Clean the area around the hydraulic fill oil cap.
Remove hydraulic fill oil cap.
g.
Place a suitable container (at least 2 gallon) under the
hydraulic reservoir and filter.
h.
i.
Remove the hydraulic filter to allow hydraulic oil to drain.
Place a small pan
under the skid plate
Transmission
and drain oil from both
left and right axles.
Install new hydraulic oil
filter filled with new oil.
Add proper amount of
hydraulic oil to reser-
voir.
j.
k.
l.
Run and purge gear-
Figure. 9
boxes. Check oil level.
m.
Add proper amount of
hydraulic oil to reservoir and repeat step L.
C.Electrical Circuit
Danger:
Read General Safety Precautions Nos. 9 and 10.
1. Battery: The battery is located beneath the operator’s seat.
Remove the fillcaps and check the level of the liquid electrolyte in
the battery every 50 operating hours. If the level in any of the six
cells has dropped below the bottom of the split ring inside the fill
hole, refill the cell with distilled water. To keep the outside of the
battery clean, brush on a strong solution of bicarbonate of soda
and water and rinse with clean water. Keep the contacts and cable
17
ends clean with a wire brush and make sure the connections are
tight. Coat the terminals with petroleum jelly to prevent corrosion.
2. Battery Storage: When storing the MMZ for long periods of time
the following guidelines should be taken.
a.
b.
c.
Disconnect the battery cables from the terminals and
remove the battery.
Clean the battery before storing. A dirty battery will lose its
charge over time.
Store the battery with a full charge. A discharged battery
will freeze (refer to the table below).
Specific
Gravity
Freezing
Temp (°F)
1.265
1.250
1.200
-71
-62
-16
Specific
Gravity
Freezing
Temp (°F)
1.150
1.100
5
16
d.
Recharge battery when ever the specific gravity value is
less than 1.225.
3. Battery Removal
Warning:
When removing the cables from the battery follow these steps to avoid a short between
the wrench and the frame.
a.
b.
c.
d.
Remove the Negative (black) cable.
Remove the Positive (red) cable.
Release the hold down straps.
Remove the battery without tipping.
4. Installing the Battery
Note:
The battery is delivered from the factory fully charged and filled with elec-
trolyte.
a.
b.
c.
Attach the Positive (red) cable.
Attach the Negative (black) cable.
Attach the rubber battery strap.
18
5. Jump Starting
Warning:
Failure to use this starting procedure can cause sparking, and the gases in the battery
to explode.
a.
b.
c.
d.
Attach the end of the red jumper cable to the Positive termi-
nal (+) of the charged battery.
Attach the other end of the red jumper cable to the Positive
terminal (+) of the low charge battery.
Attach the end of the black jumper cable to the Negative
terminal of the charged battery.
Attach the other end of the black jumper cable to the frame
of the unit with the low charge battery.
6. Fuses: There is one fuse located in the wiring between the ignition
and start switch and other electrical components. This is a stan-
dard plug-in type automotive fuse rated at 7.5 amp.
7. Safety Switches: There are five safety switches in the electrical
circuit which control the engine. They are (1) the blade clutch
switch, (2) the parking brake switch, (3) the left and (4) the right
steering lever switches and (5) the seat switch.They operate so
that in order to start the engine, the blade clutch switch must be off,
the parking brake must be engaged, and both steering levers must
be opened-out to the side in the neutral position. Once the engine
is started, the seat must be occupied and the parking brake must
be released before either of the steering levers is folded up to the
operating position or the engine’s electronic ignition will be shorted
out and the engine will stop. Also, the seat must be occupied
before the blade clutch switch can cause the blades to rotate.
8. Safety Switch Operation Checks: The following operational
checks should be made daily.
a.
Blade Clutch Switch: Sit in the operator’s seat. With both
steering levers opened-out in the neutral position and the
parking brake engaged, turn the blade clutch switch “on”
and try to start the engine. The engine should not start. If it
does, the blade clutch switch must be replaced. If the
engine does not start, turn the blade clutch switch “off” and
start the engine. Now turn the blade clutch switch “on” and
the blades should rotate. If the blades do not turn, the blade
clutch switch must be replaced, the seat switch must be
replaced or the electric PTO clutch must be repaired.
Parking Brake Switch: Sit in the operator’s seat. With both
steering levers opened-out in the neutral position and the
blade clutch switch “off”, release the parking brake and try
to start the engine. The engine should not start. If it does,
b.
19
the parking brake switch must be repositioned or perhaps
replaced. If the engine does not start, engage the parking
brake and start the engine. Swing one steering lever up to
the operating position and the engine should stop. If the
engine does not stop, the parking brake switch must be
repositioned or replaced.
c.
Left and Right Steering Lever Switches: Sit in the opera-
tor’s seat. With both steering levers opened-out in the neu-
tral position, the parking brake engaged and the blade
clutch switch “off”, swing the left steering lever up to the
operating position and try to start the engine. The engine
should not start. If it does, the left steering lever switch
must be repositioned or perhaps replaced. Open the left
steering lever to the neutral position and swing the right
steering lever up to the operating position and try to start
the engine. The engine should not start. If it does, the right
steering lever switch must be repositioned or perhaps
replaced. If the engine does not start, Open the right steer-
ing lever to the neutral position and start the engine. Swing
the left steering lever up to the operating position and the
engine should stop. If the engine does not stop, the left
steering lever switch must be repositioned or replaced.
Open the left steering lever out to the neutral position and
start the engine. Swing the right steering lever up to the
operating position and the engine should stop. If the engine
does not stop, the right steering lever switch must be repo-
sitioned or replaced.
d.
Seat Switch: With both steering levers opened-out to the
neutral position, the parking brake engaged and the blade
clutch switch in the “off” position, start the engine. Now
release the parking brake, hold down on the back of the
operator’s seat against spring pressure, and swing one of
the steering levers up to the operating position. Release the
operator’s seat and the engine should stop. If the engine
does not stop, the seat switch must be replaced. With both
steering levers folded out in the neutral position, the park-
ing brake engaged and the blade clutch switch in the “off”
position, sit in the operator’s seat and start the engine. Turn
the blade clutch switch to the “on” position and the blades
should start to rotate. Raise up slightly off the operator’s
seat and the blades should stop. If the blades do not stop
when you dismount from the operator’s seat, the seat
switch must be replaced.
e.
Electric PTO Clutch: This clutch operates when the
engine is running, the operator is in the operator’s seat and
20
the blade clutch switch is turned on.This electric clutch is a
fairly trouble free device. If a problem develops and the
blades do not turn, first check the 7.5 amp fuse in the yel-
low, 16-gauge wire between terminal “L” (for the Gasoline
Engine) on the ignition switch and the hour meter and then
investigate the wiring harness and the connections to the
seat switch, the blade clutch switch and the electric blade
clutch. Then check out the seat switch, the blade clutch
switch and finally the electric blade clutch.
D.Tires
The two front wheels are caster wheels that are free to swivel to
accommodate the direction of the MMZ.
The two rear wheels are used to propel the MMZ in the direction of input
from the drive handles. Inflation pressure of the rear tires is important for
stability while the MMZ is in operation. If the tire diameter is not equal
between the two tires, the MMZ will pull to one side.
1. Inflation Pressure:
a.
b.
c.
Traction Tires—20 psi max; 8-10 psi recommended
Front Caster Wheel—40 psi max; 25-30 psi recommended
Cutting Deck Ball Wheels—Solid Polyurethane.
Use the Following guidelines for maintaining the tires:
a.
Balance inflation pressure between the rear tires to help
maintain straight travel (see tire side wall for proper inflation
pressure).
b.
Keep the valve caps tightened to prevent air pressure loss.
2. Leaking Tires: When a flat tire occurs, repair or replace immedi-
ately. The normal procedure is to remove the wheel and replace it
with a spare. Take the leaking tire to a maintenance area and
repair. If a tire is getting soft, park the mower on the nearest level,
paved area. If the leaking tire is on a traction wheel, put blocks on
each side of the opposite traction wheel and jack up the tire that
leaks about an inch off the ground. Loosen and remove the lug
nuts and remove the wheel. Mount a spare wheel and tire, replace
the lug nuts, and using a torque wrench, tighten them to 60
lbs.
±
10 ft-
If the leaking tire is on a front caster wheel, block both traction
wheels and raise the caster wheel so that the tire is an inch off the
ground. Loosen and remove the locknut from the axle assembly
and pull the axle assembly from the caster yoke. The wheel and
21
two spacer sleeves will drop free. Slip the axle assembly through
one side of the caster yoke, through a spacer sleeve, a spare
wheel, the other spacer sleeve and finally through the other side of
the caster yoke. Then tighten the locknut on the end of the axle
assembly.
Lower the mower off the jack and continue mowing. The wheel
with the leaking tire should be taken to the maintenance area, the
tire inflated to 20 psi and the wheel placed in a large bucket of
water. Carefully inspect the tire, rim and valve for escaping air
bubbles which indicate a leak. Mark each leak with a yellow
marking crayon and then deflate the tire to 8 psi and repeat the
inspection. If the leaks you find are pin hole size to 1/16" diameter,
the tire can be repaired using an aerosol can of tire inflater and
latex sealer available from any auto supply store. Follow the
directions on the can. If the leaks are larger than 1/16" diameter,
the tire can be repaired with rubber plugs also available in a kit
from any auto supply store. If the tire bead is damaged, a tube will
have to be installed in the tire or the tire will have to be replaced.
3. Creeping: Creeping is the slight forward or backward movement of
the mower when the throttle is on and the lapbars are in the
opened-out position. If your mower creeps do the following.
a.
b.
c.
Jack up rear of unit.
Place Lapbars in neutral opened-out position.
Locate jam nuts (ref no. 23 in the control assembly parts
list). See Illustrated Parts Book.
d.
Loosen jam nuts on both ends of rod connectors. (ONLY if
mower creeps.)
e.
f.
Start unit and push throttle all the way on.
Locate the left and right rod connectors between each jam
nut. See Control assembly in the Illustrated Parts Book.
If unit creeps forward rotate counter-clockwise. And if unit
creeps in reverse, rotate clockwise.
g.
Adjust the appropriate rod connector. The left rod for the left side
of the mower and the right rod for the right side of mower.
Afterward, retighten jam nuts.
E. Brakes
While the mower is in motion, all braking is performed dynamically through the
hydraulic pumps and traction motors, controlled by the two steering levers.
When the mower is parked with the engine shut off, the hydraulic system locks
the traction wheels.
22
Note:
If you wish to move the mower by
pushing, you must release the dynamic brak-
ing. Locate the levers at the rear of the mower.
Pull both levers out and lock in position. After
pushing the mower to the desired location,
return both levers to the operating position
(See photo at right).
When the mower is parked with the engine
running and the steering levers opened out
in the neutral position, the parking brakes
should be applied. The parking brakes are
drum-type brakes mounted on each traction
wheel.They are both engaged by the same
operating lever.
Hydro Release Levers
1. Adjustments: The parking brake handle is an overcenter lever that
should engage with moderate force.
Note:
To increase parking brake capacity tighten the brake rods going back to the
brake arms equally. Tighten rods one full turn and check parking capacity. Repeat Step.
To adjust either brake individually, disconnect the brake rod from the brake
arm by removing the cotter pin from the clevis pin and pulling the clevis pin
from the brake clevis. Loosen the hex nut and turn the brake clevis in a
clockwise direction one full turn looking down the brake rod. This will
tighten the brake about .040 inch. Tighten the hex nut and reassemble the
brake clevis to the brake shaft assembly. Normally, both brakes should be
adjusted and equal amount.
2. Repair: The mower is equipped with internal wet drum brakes and
will not normally require maintenance. If they are not working prop-
erly, please contact your service center.
F. Hydraulic System
1. Hoses: Check the hoses from the hydraulic oil tank to the oil filter
to the hydraulic lines daily for leaks or abrasion and replace any
damaged hoses. Make certain there are no kinks or twists in any
hose.
2. Hydraulic Oil Tank and Filter:
Note:
Change the hydraulic oil and the oil filter after the first 50 hours of operation
and every 500 hours thereafter.
To drain the hydraulic oil tank, place a 2 gallon drain pan under the drain
plug on the bottom of the hydraulic oil tank. Remove the drain plug, drain
the tank, then replace the plug. Place the drain pan under the filter and
remove the filter by unscrewing in a counterclockwise direction. The filter
will be full of oil, so empty it into the drain pan. You don’t have to drain the
23
rest of the hydraulic system. Fill the replacement filter with a good grade of
20W-50 oil and lubricate the sealing surface. Screw the filter onto the filter
base until it seats and then another one-half turn to seal.
Note:
Always wipe off the hydraulic tank fill cap and the area around it before
removing the cap to prevent dirt from contaminating the oil.
Remove the fill cap and fill the tank with the same 20W-50 oil selected for
the filter until the oil level is up to the level of the second hole in the fill
tube. Leave this air space for expansion. Start the engine and let it run at
idle for about five minutes. Check the filter for leaks. Idling the engine and
the pumps in this way will purge any air from the system. Shut off the
engine and recheck the oil level in the tank. Top-off if necessary until the
oil level is up to the second hole n the fill tube.
3. Hydrostatic Transmissions and motors: The pumps are the
hardest-working components in the hydraulic system. They are in
operation all the time the engine is running. Because of extremely
close tolerances, wear is an important factor in their life. Contami-
nants in the hydraulic oil and cavitation does the greatest harm to
the pumps. Cavitation is a blockage in the supply lines that pro-
duces a partial vacuum causing violent bubbling in the hydraulic oil
in the pump.
Check the two suction hoses (the hoses connected to the filter)
daily before starting the engine. Look for a flattened condition or
any leaks and repair or replace as necessary. A flattened or leakng
suction hose will permit cavitation to develop which can destroy the
pumps in a short time.
Contaminants or foreign matter in the oil will also damage the
pumps . To prevent this, use a filter that captures particles as small
as 30 microns or 30 millionths of a meter in diameter. You can help
in the battle against dirt by being very careful when you remove or
repair a component in the hydraulic system. Thoroughly clean off
any component before you work on it. Plug the ends of any hose or
line you remove with a rubber or plastic plug. Use plastic caps to
seal off the ends of hydraulic fittings. Place any component you
remove in a clean plastic bag so it can’t pick up dust or dirt. Clean
your hands frequently when working on the hydraulic components.
Note:
The pumps are not owner-repairable. If a pump fails, call our Service
Department for a replacement. Do not disassemble the pump.
4. Steering Lever Adjustments: Place the mower on level ground
with the engine running, parking brake off and steering levers
24
opened out to the neutral position. If the MMZ begins to creep,
adjust the Steering Levers.
If the mower creeps, first determine whether it creeps to the right or
left side and which direction the mower moves — to the front or the
rear. To make the adjustment, place the steering levers in the
opened-out neutral position and set the parking brake, shutoff the
engine, take the key from the ignition switch and pivot the seat for-
ward. If the mower creeps to the right, you will adjust the linkage on
the left side of the mower and vice-versa. Remove the cap screw
and lock washer that secure the linkage control arm rod end bear-
ing to the control lever pivot. Loosen the jam nut which prevents the
rod end bearing from turning. If the mower creeps forward, thread
the rod end bearing one-half turn clockwise into the linkage control
arm. If the mower creeps backward, thread the rod end bearing
one half turn counterclockwise out of the linkage control arm. Then
tighten the jam nut and reconnect the rod end bearing to the con-
trol lever pivot by replacing the cap screw and lock washer.
After adjusting the steering linkage, swing the seat back to its nor-
mal position and place the steering lever on the side you adjusted
up to the operating position. If you feel a slight push forward or a
slight pull backward from the neutral position you must adjust the
lever return assembly. To do this, swing the steering lever back out
to the neutral position, pivot the seat forward and loosen the jam
nut on the lever return rod where it is threaded into the hex-shaped
end of the lever return bolt. If the steering lever was pushed for-
ward, turn the hex-shaped lever return bolt clockwise one-half turn
off of the lever return rod. If the steering lever was pulled back, turn
the hex shaped lever return bolt counterclockwise one-half turn
onto the lever return rod. Then tighten the jam nut, pivot the seat
back into the operating position and start the mower to check that
your adjustments were made correctly.
25
G. Storage
1. General: If your mower will not be in service for a few months, it
should be stored in a dry location that is not subject to drastic
changes in temperature. Before storing, the following maintenance
procedures should be performed.
a.
b.
c.
Clean the mower. The entire tractor and cutting deck
should be washed and cleaned.
Sharpen the blades so that the mower will be ready to use
when needed.
Protect the metal surfaces. Repair scratches with the
appropriate touch-up paint spray. Brush a rust preventive
oil on any unpainted surfaces including the pulleys and
blades. (Be careful not to get any oil on the drive belts.)
Lubricate the mower.
Drain the engine oil. The engine should be warm so that all
the oil drains. Replace the engine oil filter and refill the
crankcase with fresh oil.
d.
e.
f.
Gasoline Engine: Drain all the fuel. Close the fuel tank
shutoff valve. Disconnect the fuel line from the carbuetor
and put the end into an approved fuel container. Open the
fuel tank shutoff valve and drain the fuel tank and
line into the approved container. Replace the fuel line on
the carburetor. Start the engine and allow it to run out of
fuel. This will prevent gum and varnish deposits from form-
ing. Replace the fuel filter.
g.
Gasoline Engine Only: Remove the spark plugs and pour
approximately one ounce of oil into each cylinder. Crank
the engine one or two turns to spread the oil evenly on the
cylinder walls. Replace the spark plugs.
h.
i.
Clean the battery and make sure it is fully charged.
Inspect the hydraulic hoses, lines and fittings. Replace as
necessary.
j.
Jack the mower up and store it on blocks to take the weight
off of the tires.
2. To Put the Mower Back in Service:
a.
b.
Check the battery. Charge if necessary.
Gasoline Engine Only: Remove the spark plugs and wipe
them off. Using the starter, crank the engine to pump the
excess oil out of the spark plug holes. Replace the spark
plugs and the ignition leads. Refill the fuel tank with fresh
gasoline.
c.
d.
Check the level of the oil in the crankcase and the hydraulic
tank.
Lower the mower off the block and check the tire pressure.
26
e.
Push the mower outdoors and start the engine. Let the
engine idle until it has warmed up completely (4 to 5 min-
utes).
MAINTENANCE SCHEDULE
A. Daily Checks
1. Before starting engine:
a.
b.
c.
d.
Check the fuel level.
Check the engine oil level.
Check the hydraulic oil level.
Check the hydraulic hoses for leaks, abrasion, kinks, twists,
or a flattened condition.
e.
Check the tires and tire pressure.
Drive Tires: 8-10 psi.
Front Caster Wheels: 30 psi.
f.
g.
Check the blade belts, the PTO belts and the blower belt.
Check the blades. Make sure they are sharp and that the
blade securing cap screws are tight.
Check the cutting height.
h.
2. When ready to start the engine:
a.
Check the five safety switches for proper operation.
3. After mowing:
a.
b.
c.
d.
Clean the mower.
Clean the engine air screen.
Oil the wear points. Follow the Oiling Chart.
After the first five hours, Change the engine oil and engine
oil filter.
B. Every 25 Hour Checks
1. Service the engine foam element air precleaner.*
2. Grease the three spindle bearings.
C. Weekly or Every 50 Hour Checks
1. Change the engine oil. (Every 25 hours under heavy duty opera-
tion.)
2. Clean or replace the engine’s paper air cleaner element.*
3. Check the battery’s electrolyte level.
4. Clean the engine cooling fins and external surfaces.*
5. After the first 50 hours, change the hydraulic oil and the hydraulic
oil filter. Change them every 500 hours thereafter.
6. Oil wear points. Follow the Oiling Chart.
7. Lubricate all grease fittings. Follow the Lubrication Chart.
D. Every 100 Hour Checks
27
1. Change the engine oil filter. (Every 50 hours under heavy duty
operation.)
2. Check the engine spark plugs.
E. Yearly Checks
Check the oil in the hydraulic reservoir.
* Perform maintenance more frequently under dusty conditions.
Oil CHART
Apply a few drops of SAE 20W-50 engine oil or use a
spray lubricant. Apply the oil to both sides of pivot
points. Wipe off any excess. Start engine and operate
mower briefly to insure that oil spreads evenly.
Number of Oil
Points
Description
Daily
4
4
Deck Suspension Pivots
Height Adjustment
Turnbuckle Clevis Pin
Height Adjustment Handle
Pivots
2
2
2
2
1
2
Height Adjustment Stop Pivots
Deck Lift Linkage Pivots
Transport Handle Pivots
Transport Handle Pin
Deck Frame Up-and-Down
Pivots
WEEKLY
1
2
Seat Hinge
Steering Lever Linkage Rod
End Bearings
2
Lever Return Assembly Rod
End Bearings
2
1
1
1
4
2
2
Pump Control Lever Pivots
Brake Lever Pivot Clevis Pin
Brake Lever Control Rod Pivot
Brake Control Rod Swivel Joint
Brake Rod Clevis Pins
Brake Shaft Assembly Pivots
Grass Collection System Lid
Hinges
(If Mower is so equipped)
28
LUBRICATION CHART
Use a grease-gun filled with NO. 2 Multipurpose
Lithium Base Grease
Number of
Grease Fittings Description
EVERY 25 HOURS
3
Blade Spindle Bearings
WEEKLY
2
2
4
2
1
2
1
1
2
Front Caster Wheels
Front Caster Wheel Spindles
Mowing Deck Pivots
Deck Take-Up Idler Pivots
Axle Pivot
Steering Lever Pivots
Hydro Take-up Idler Pivot
Park Brake Pivot
Mower Deck Ball Wheels
29
WIRING DIAGRAM
30
31
EQUIPMENT TWO-YEAR LIMITED WARRANTY
This warranty is specific to the product manual it is attached to.
For a complete list of products and warranties contact your MTD Pro dealer.
Proper maintenance of your MTD Pro equipment is the owner’s responsibility. Follow the instruc-
tions in your owner’s manual for correct lubricants and maintenance schedule. Your MTD Pro dealer car-
ries a complete line of quality lubricants and filters for your equipment’s engine, transmission, chassis
and attachments.
1. What Is Covered By This Warranty. This limited warranty covers any defect in materials or workman-
ship in your MTD Pro equipment for two year from the date of purchase for the first user purchaser. MTD
Pro will replace or repair any part or parts without charge through your authorized MTD Pro dealer. Bat-
teries, belts and tires will be covered for a period of ninety (90) days from date of purchase. Engine war-
ranties beyond listed coverage, if available, is handled directly with the engine manufacturer.
2. What Is Not Covered By This Warranty. MTD Pro does not warrant (a) routine maintenance items
such as lubricants, filters (oil, fuel, air and hydraulic), cleaning, tune-ups, brake or clutch inspection, ad-
justments made as part of normal maintenance, blade sharpening, setup and normal wear. (b) incidental
costs such as transporting equipment to and from the dealer, telephone charges or renting a product tem-
porarily to replace a warranted product. (c) damage caused by use of the equipment for purposes other
than those for which it was designed; (d) damage caused by accident or disasters such as fire, flood, wind
and lightning; (e) damage caused by unauthorized attachments or modification; or (f) any other abuse or
misuse of the equipment.
3. EXCLUSIVE WARRANTY. THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES OR REMEDIES, WHETHER WRITTEN, ORAL OR IMPLIED. ANY AND ALL IM-
PLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, COURSE
OF DEALING OR USAGE OF TRADE ARE HEREBY EXPRESSLY DISCLAIMED AND EXCLUDED.
4. LIMITATION OF REMEDIES. UNDER NO CIRCUMSTANCES, EXCEPT TO THE EXTENT PROHIB-
ITED BY APPLICABLE LAW, SHALL MTD Pro BE LIABLE FOR ANY LOSS OR DAMAGE, DIRECT OR
INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL ARISING OUT OF THE USE OF OR IN-
ABILITY TO USE THIS EQUIPMENT INCLUDING BUT NOT LIMITED TO ANY CLAIM FOR LOSS OF
PROFITS, LOSS OF SAVINGS OR REVENUE, LOSS OF USE OF THE EQUIPMENT OR ANY ASSO-
CIATED EQUIPMENT, FACILITIES OR SERVICE, DOWNTIME, THE CLAIMS OR COSTS OF THIRD
PARTIES INCLUDING CUSTOMERS, AND INJURY TO PROPERTY.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation
of incidental or consequential damages, so the above limitations or exclusion may not apply to you. This
warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
5. Future Changes. MTD Pro reserves the right to reserve, change or modify the construction and design
of its Equipment or any component part or parts thereof without incurring the obligations to make such
changes or modifications in present equipment.
6. How to Obtain Service: Contact the authorized MTD Pro dealer at the point of original retail pur-
chase to obtain service or replacement parts. If you need further assistance in finding an authorized
MTD Pro servicing dealer, contact:
MTD Pro
P.O. Box 361131
Cleveland, Ohio 44136
Form No. 01004029 Rev. 99-2
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