MTD 144-810-000 User manual

OWNERS
MANUAL
GARDEN
TRACTORS
(11, 16 and 18 H.P.)
ASSEMBLY
OPERATION
MAINTENANCE
PARTS LIST
Important:
Read Safety Rules and
Instructions Carefully
PRINTED IN U.S.A.
Model Numbers
144-810-OOO*^ 144-811-000
144-822-000//^ 144-823-000
144-824-000-^ 144-825-000
144-826-000 144-827-000
144-832-000//P 144-833-000
144-834-000^^ 144-835-000
144-836-000 ^ 144-837-000
hank you for purchasing an
^Aqnerican built product.
^RM NO. 770-3182

1
Safe Operating Practices
Assembly.
Controls.
Operation.
Adjustments.
Lubrication.
Maintenance .
INDEX
.3 Off-Season Storage.16
.5 Troubleshooting Chart.17,18
.8 Illustrated Parts for Tractor.20-31
.9 Illustrated Parts for Transaxle ...32,33
10 Electrical Diagrams and Parts Lists.34,35
11 Parts Ordering Information ..Back Cover
12
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V
LIMITED WARRANTY
For one year from the date of oric inal retail purchase, MTD PRODUCTS INC \A/ill either
repair or replace, at its option, free Df charge, F.O.B. factory or authorized service firm, any
part or parts found to be defective n material or workmanship. Transportation charges for
the movement of any power equiprr ent unit or attachment are the responsibility of the pur¬
chaser. Transportation charges for any parts submitted for replacement under this warran¬
ty must be paid by the purchaser ur less such return is requested by MTD PRODUCTS INC.
This warranty will not apply to any part which has become inoperative due to misuse, ex¬
cessive use, accident, neglect, improper maintenance, alterations, or unless the unit has
been operated and maintained in accordance with the instructions furnished. This warran¬
ty does not apply to the engine, mo or, battery, battery chargeror component parts thereof.
Please refer to the applicable man jfacturer’s warranty on these items.
This warranty will not apply where the unit has been used commercially.
Warranty service is availabie throu jh your local authorized service dealer or distributor. If
you do not know the dealer or distri butor in your area, please write to the Customer Service
Department of MTD.
The return of a complete unit will not be accepted by the factory unless prior written per¬
mission has been extended by MTD.
This warranty gives you specific Ingal rights. You may also have other rights which vary
from state to state.
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t- warning {
This unit is equipped with an internal combustion engine and should not be used on or near any unim¬
proved forest-covered, brush-covered or grass-covered land unless the engine’s exhaust system is
equipped with a spark arrester meeting ap alicable local or state laws (if any). If a spark arrester is used, it
should be maintained in effective workinc order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources
Code), ether states may have similar laws. Federal laws apply on federal lands. A spark arrester muffler is
available at your nearest engine authorized service center.
2

To reduce the potential for any injury, comply with the following safety instructions. Failure to comply
with the instructions may result in personal injury.
SAFE OPERATION PRACTICES FOR RIDING VEHICLES
1. Read this owner’s manual carefully In its en¬
tirety before attempting to assemble or
operate this unit. Keep this manual in a safe
place for future and regular reference and for
ordering replacement parts.
2. This unit is a precision piece of power equip¬
ment, not a plaything. Therefore exercise ex¬
treme caution at all times.
3. Know the controls and how to stop quickly—
READ THIS OWNER’S MANUAL.
4. Do not allow children to operate vehicle. Do
not allow adults to operate it without proper
instruction. Only persons well acquainted
witfi these rules of safe operation should be
allowed to use your mower.
5. No one should operate this unit while intox¬
icated or while taking medication that impairs
the senses or reactions.
6. Wear sturdy, rough-soled work shoes and
close-fitting slacks and shirts to avoid en¬
tanglement in the moving parts. Never operate
a unit in bare feet, sandals, or sneakers.
7. To prevent injury, do not carry passengers or
give rides. Keep children, pets and by¬
standers out of the area while mowing. Only
the operator should ride on the unit and only
ride in the seat.
8. Check overhead clearance carefully before
driving under power lines, guy wires, bridges
or low hanging tree branches, before entering
or leaving buildings, or in any other situation
where the operator may be struck or pulled
from the unit, which could result in serious in¬
jury.
9. To maintain control of the unit and reduce the
possibility of upset or collision, operate the
tractor smoothly. Avoid erratic operation and
excessive speed.
10. Keep the area of operation clear of all per¬
sons, particularly small children and pets.
Stop engine when they are in the vicinity of
your mower. Although the area of operation
should be completely cleared of foreign ob¬
jects, a small object may have been over¬
looked and could be accidently thrown by the
mower in any direction and cause injury.
11. Clear work area of objects which might be
picked up and thrown by the mower in any
direction and cause injury.
12. Stop the blade(s) when crossing gravel drives,
walks or roads.
13. Disengage all attachment clutches and shift
into neutral before attempting to start engine.
14. Disengage power to attachment(s) and stop
engine before leaving operating position.
15. Do not put hands or feet near or under rotating
parts. Keep clear of the discharge opening at
all times as the rotating blade(s) can cause in¬
jury.
16. Disengage power to attachment(s) and stop
engine before making any repairs or ad¬
justments. Disconnect the spark plug wire
and keep the wire away from the plug to pre¬
vent accidental starting.
17. Before attempting to unclog the mower or
discharge chute, stop the engine. The mower
blade(s) may continue to rotate for a few
seconds after the engine is shut off.
Therefore, be sure the blade(s) have stopped
completely. Disconnect the spark plug wire
and keep the wire away from the plug to pre¬
vent accidental starting.
18. Disengage power to attachment(s) when
transporting or not in use.
19. Take all possible precautions when leaving
vehicle unattended such as disengaging
power-take-off, iowering attachments, shift¬
ing into neutral, setting parking brake, stop¬
ping engine and removing key.
20. Do not stop or start suddenly when going
uphill or downhill. Mow up and down face of
steep slopes; never across the face. Use ex¬
treme caution if it is necessary to drive the
tractor up an incline or back the tractor down
an incline because the front of the tractor
could lift and rapidly flip over backward which
could cause serious injury.
21. Reduce speed on slopes and in sharp turns to
prevent tipping or loss of control. Always
keep the tractor in gear when going down
steep hills to take advantage of engine brak¬
ing action.
22. Stay alert for holes in terrain and other hidden
hazards.
23. Use care when pulling loads or using heavy
equipment.
A. Use only approved drawbar hitch points.
B. Limit loads to those you can safely control.
C. Do not turn sharply. Use care when back¬
ing.
D. Use counterweight(s) or wheel weights
when suggested in owner’s manual.
24. Watch out for traffic when crossing or near
roadways.
25. When using any attachments, never direct dis¬
charge of material toward bystanders nor
allow anyone near vehicle while in operation.
26. Handle gasoline with care. It is highly flam¬
mable.
A. Use approved gasoline container.
B. Never remove cap or add gasoline to a run¬
ning or hot engine or fill fuel tank indoors.
Wipe up spilled gasoline.
C. Open doors if engine is run in garage. Ex¬
haust fumes are dangerous. Do not run
engine indoors.

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27. Keep the vehicle and attachments iti good
operating condition, and keep safety c evices
in place. Use guards as instruc ed in
operator’s manual.
28. Keep all nuts, bolts, and screws tight to be
sure the equipment is in safe working condi¬
tion.
29. Never store the equipment with gasc line in
the tank inside a building where fum js may
reach an open flame or spark. Allow engine to
cool before storing in any enclosure.
30. To reduce fire hazard, keep engine free of
grass, leaves or excessive grease.
31. The vehicle and attachments should be
stopped and inspected for damage afhsr strik¬
ing a foreign object. The damage shc uld be
repaired before restarting and operat ng the
equipment.
32. Do not change the engine governor S3ttings
or overspeed the engine.
33. When using the vehicle with mower, p'oceed
as follows:
(1) M o w only in daylight or in good a tificial
light.
(2) Never make a cutting height adjustment
while engine is running if operator must
dismount to do so.
(3) Shut the engine off and wait until the
blade comes to a complete stop before
removing the grass catcher.
(4) Check blade mounting bolts for proper
tightness at frequent intervals.
34. Check grass catcher bags frequently for wear
or deterioration. For safety protection, replace
only with new bag meeting original equipment
specifications.
35. Look behind to make sure the area is clear
before placing the transmission in reverse
and continue looking behind while backing
up. Disengage blades before shifting into
reverse and backing up.
36. This unit should not be driven up a ramp onto
a trailer or truck under power, because the
unit could tip over, causing serious personal
injury. The unit must be pushed manually to
load properly.
4

ASSEMBLY
NOTE
This unit is shipped WITHOUT GAS¬
OLINE or OIL. After assembly, see
separate engine manual for proper
fuel and engine oil recommenda¬
tions.
magnesia, beaten egg or vegetable oil. Seek
prompt medical attention. EYES: Flush with cool
water for at least 15 minutes, then seek immediate
medical attention.
Since batteries produce expiosive gases, keep all
lighted materials (cigarettes, lighters, matches,
etc.) away. Be sure to charge battery only in well-
ventilated areas.
This owner’s manual covers various models of
garden tractors. The units illustrated may vary
slightly from your unit. Follow the instructions
which pertain to your unit.
BATTERY INFORMATION
warning \
A. B attery acid must be handled with great care
as contact with it can burn and blister the skin.
It is also advisable to wear protective clothing
(goggles, rubber gloves and apron) when work¬
ing with it.*
B. S hould battery acid accidentally splatter into
the eyes or onto the face, rinse the affected
area immediately with clean cold water. If
there is any further discomfort, seek prompt
medical attention.
C. If acid spills on clothing, first dilute it with
clean water, then neutralize with a solution of
ammonia/water or baking soda/water.
D. Since battery acid is corrosive, do not pour it
into any sink or drain. Before discarding empty
electrolyte containers, rinse them with a
neutralizing solution.
E. NEVER connect or disconnect charger clips to
battery while charger is turned on as it can
cause sparks.
F. Keep all lighted materials (cigarettes,
matches, lighters) away from the battery as the
hydrogen gas generated during charging can
be combustible.
G. A s a further precaution, only charge the battery
in a well-ventilated area.
*Always shield eyes, protect skin and clothing
when working near batteries.
t
Battery contains sulfuric acid. Antidote: EXTER¬
NAL—Flush with water. INTERNAL—Drink large
quantities of water or milk. Follow with milk of
KEEP BATTERIES OUT OF THE REACH OF CHIL¬
DREN.
ACTIVATING THE BATTERY
1. Place the battery to be filled on a workbench.
Never activate a battery in the unit.
2. Slip one end of battery drain tube on the bat¬
tery manifold.
3. Remove the fill caps from all cells.
4. Fill each cell carefully using 1.265 specific
gravity electrolyte. Fill each cell to the top of
the separators. Do not overfill.
5. Let the battery sit for 20 minutes to allow the
chemical reaction to take place.
6 .
Charge the battery at a MAXIMUM RATE OF 5
AMPS, until the specific gravity reads 1.265.
Use a hydrometer to check the specific gravi¬
ty.
CAUTION
An excessive rate of charge will
damage the battery.
7. Check the level of electrolyte. Adjust level to
bottom of split ring if necessary with elec¬
trolyte.
8 .
Replace fill caps.
CAUTION
After battery has been in service,
add only distilled water, or pure
drinking water. DO NOT ADD ACID.
NOTE
This engine is equipped with an
alternator. The current for the bat¬
tery charger alternator is unregu¬
lated. During normal operation, it is
only necessary to charge the battery:
1. When it is activated for the first
time.
2. Before winter storage.
3. Before using the lawn tractor
after winter storage.
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1
FIGURE 1.
_ , „ Hold-Down
FIGURE 2.
INSTALLING THE BATTERY
The positive battery terminal is
marked Pos. ( + ). The negative bat¬
tery terminai is marked Neg. (-).
1. Place the battery on the battery plate vyith the
terminals towards the rear of the tractor.
2. Attach the positive cabie (heavy red wire) and
the small red wire (from the circuit breaker) to
the positive battery terminal (-f) with a V4 -20 x
3 / 4 " long bolt, lock washer and hex nut pro-
—vided in the battery pack. See figure 1.
3. Attach the negative cable (heavy black wire) to
the negative battery terminal (-) with the
other 1 / 4-20 X 3/4" long bolt, lock washer and
hex nut.
4. H o ok one hold-down rod into the hole in bat-
—tery plate beside the battery. See figure 2.
Place the battery cover in position over the
hold-down rod. Secure with wing nut. Attach
other hold-down rod to the other side of bat¬
tery cover in the same manner.
5. R oute the battery drain tube down beside the
oil drain pipe on the right side of the tractor.
11 H.P. Tractor— Secure battery drain tube to
oil drain pipe with plastic tie provided. Cut off
excess end of plastic tie.
16 and 18 H.P. Tractor— Slip the end of the
drain tube into the mounting clamp provided
in hardware pack. Secure the mounting clamp
to the tractor by placing the clamp over the
hex bolt and nut which hold the engine pulley
belt guard to the frame. Secure in place with
hex lock nut provided in hardware pack. See
—figure 3.
FIGURE 3.
6
The vented battery allows any gases
or liquid from the battery to be
drained onto the ground.

FIGURE 4A.—Models 810, 822, 824, 834 and 836
FIGURE 5.—Models 811, 823, 825, 833 and 835
SEAT ASSEMBLY
Models 810, 822, 824, 834 and 836:
The seat can be adjusted to four positions. With
the seat tipped forward, hook the front of the seat
spring into the slots on the tractor frame. Allow
the seat to pivot backwards until it rests on the
—rear of the springs. See figure 4A.
Models 811, 823, 825, 833 and 835:
Place the seat in position against the seat
brackets. Secure each side of seat with 3 / 4 " long
hex bolt, two belleville washers (on the inside and
outside) and hex lock nut. Crown side of washers
should be against the head of the bolt and the nut.
- 4 —See figure 4B.
STEERING WHEEL INSTALLATION
1. M o dels 811, 823, 825, 833 and 835 only: There
are four height positions for the steering
wheel. For shipping purposes, the steering
shaft is assembled in the lowest position. Lift
the hood of the tractor. Remove the hairpin
cotter and clevis pin on the steering shaft.
Raise the shaft to desired position and secure
with hairpin cotter and clevis pin. See
reference numbers 56 and 57 on page 28.
2. M o dels 811, 823, 825, 833 and 835 only: Attach
the plastic steering bellow to the steering
—wheel as shown in figure 5.
One end of the steering bellow is
slightly larger than the other. The
larger end must be assembled to the
steering wheel.
3. P lace steering wheel over the steering shaft,
lining up the flats in the wheel with the flats
on the shaft.
7

1
FIGURE 6.
4. Secure with cupped washer (cupped side
against the steering wheei) and hex nut. See
-figure 6.
5. Press the steering wheei cap on the steering
wheel by hand.
TIRE PRESSURE
For shipping purposes, the tires on your unit may
be over-infiated. Tire pressure should be reduced
before unit is put into operation. Recommended
operating tire pressure shouid be 10 p.s.i.
Check sidewali of tire for manufacturer’s max¬
imum tire pressure. If this information does not
appear on your tire, maximum tire pressure under
any circumstances is 30 p.s.i. Equal tire pressure
should be maintained on all tires.
CONTROLS
IGNITION SWITCH
The ignition switch is located in the cente' of the
dashboard. Turn the key to the START position to
start the engine. When the engine is running,
leave the key in the ON position. To slop the
engine, turn the key to the OFF positicn. See
figure 7.
WARNING
Remove the key from the tracto
when the tractor is not in use to pre
vent accidental starting.
THROTTLE CONTROL
The throttle control is located on the left side of
the dashboard and is used to regulate the engine
speed. See figure 7. The engine shojid be
operated from % to full throttle (FAST when
operating any equipment that uses the tractor
engine as a source of power such as the nowing
deck, snow thrower or rotary tiller.
CHOKE CONTROL (16 and 18 H.P. only)
The choke control is located on the right side of
the dashboard and is operated manually. Details
for the choke operation are covered in the
separate engine manual packed with your unit.
See figure 7.
LIGHT SWITCH
The head lamps are operated by pushing the light
switch located on the dashboard. The heac lamps
will only operate when the engine is running. See
figure 7.
AMMETER
The ammeter registers the rate of battery charge
or discharge. The ammeter will register on the
discharging side with starting the engine. It
should register on the opposite side (charging)
when the engine is running in the fast position un¬
til the battery is completely charged. With a fully
charged battery or with the engine idling, the am¬
meter will not show a charge. See figure 7.
FIGURE 7.—16 and 18 H.P. Models Shown
8

GASOLINE TANK
The gasoline tank is located under the tractor
seat. Tip the seat forward to fill the tank. Refer to
figure 4.
GEAR SHIFT LEVER
The transaxle has four forward gears, neutral and
reverse. Do not shift through the gears on the
transaxle as you would in an automobile. Pre¬
select the gear appropriate for the job you are do¬
ing. See figure 8.
You must depress the clutch-brake pedal and
come to a complete stop before shifting gears.
CLUTCH-BRAKE PEDAL
The clutch-brake pedal is located on the right side
of the tractor. See figure 8. Depressing the clutch-
brake pedal part way disengages the clutch.
Pressing the pedal all the way down disengages
the clutch and engages the disc brake.
The clutch-brake pedal must be
depressed to start the engine.
PARKING BRAKE
To set the parking brake, depress the clutch-brake
pedal and pull up the parking brake knob. It will
stay in the raised position. To release the parking
brake, depress and release the clutch-brake pedal.
See figure 8.
Incline
INCLINE ASSISTANCE BRAKE LEVER
When stopping on a hill, hold the incline
assistance brake lever back while you release the
clutch-brake pedal until the tractor begins to
move, then release the lever. This lever permits
smoother starts and clutch engagement by
holding the tractor during the brake release/clutch
engagement operation. See figure 8.
LIFT LEVER
The five position lift lever is used to change the
operating position of the attachments. To operate,
pull the lever towards you. To release, move the
lever to the right and then forward. See figure 8.
POWER TAKE-OFF (PTO) LEVER
The PTO lever is located on the right side of the
dashboard. To engage the PTO, lift the lever slow¬
ly and lock it into the notch. See figure 7.
The PTO lever must be in the
disengaged position (down) when
starting the engine and when shift¬
ing into reverse.
OPERATION
A
CAUTION
Keep all shields in place.
Before leaving operator’s position:
a. Shift transmission to neutral
b. Set parking brake
c. Disengage attachment clutch
d. Shut off engine
e. Remove ignition key
Wait for all movement to stop before
servicing machine.
Keep people and pets a safe distance
away from machine.
Look to the rear before backing up.
PREPARATION
NOTE
When packaged for shipment, the
machine contains no oil or gasoline.
Before starting the engine, oil must
be added to the engine crankcase
and gasoline to the tank. DO NOT
mix oil with gasoline.
9

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1. Put oil in engine crankcase. Refer to S€ parate
engine manual packed with your u lit for
engine oil recommendations.
2. Fill the fuel tank with clean, fresh, leed-free,
low-lead or regular grade leaded gasoline.
OPERATING THE TRACTOR
This unit is equipped with a safety
interlock system for your pro¬
tection. The purpose of the safety
interlock system is to prevent the
engine from cranking or starting
unless the clutch-brake pedal is
depressed and the PTO lever is
in the disengaged position. In addi¬
tion, the PTO lever must be in the
disengaged position when the unit
is put into reverse or the engine
will shut off.
WARNING
Do not operate the tractor if the in¬
terlock system is malfunctioning be¬
cause it is a safety device, designed
for protection.
1. Place the PTO lever in the disengaged idown)
position.
2. 16 and 18 H.P. Units Only— P ull out the choke
control. A warm engine requires less choking.
3. Set the throttle control in the FAST position.
4. Depress the clutch-brake pedal and hold it
down.
5. Turn the ignition key to the START position.
After the engine starts, release the key
6. 16 and 18 H.P. Only— Slowly push n the
choke as the engine warms up.
7. With the clutch-brake pedal depressed, move
the gear shift lever into one of the fcfward
gears or reverse.
8 . Slowly release the clutch-brake pedal aid the
tractor will move forward.
9. When stopping, depress the clutchrbrake
pedal. This will apply both the clutch aid the
brake.
10. T o shut off the engine, turn the ignition key to
the left to the OFF position. Remove the key
to prevent accidental starting while squip-
ment is unattended.
IMPORTANT
If you strike a foreign object, stop
the engine. Remove wire from spark
plug, thoroughly inspect the mower
for any damage, and repair the
damage before restarting and
operating the mower.
ADJUSTMENTS
WARNING
t
Disconnect the spark plug wire and
ground against the engine before
performing any adjustments, repairs
or maintenance.
SEAT ADJUSTMENT
Models 810, 822, 824, 834 and 836:
The tractor seat is adjustable to four positions. To
change positions, tip the seat all the way forward
and lift it out of the slots on each side. Refer to
figure 4A.
Models 811, 823, 825, 833 and 835:
To adjust the position of the seat, loosen the four
self-tapping screws on the bottom of the seat. See
figure 4B. Slide the seat forward or backward as
desired. Retighten the self-tapping screws.
REAR WHEEL TRACK ADJUSTMENT
The distance between the rear wheels can be
changed from wide to narrow by removing the rear
wheels one at a time and reversing them on the
hub.
With the rear wheels in the narrow position, the
outside of the rear wheels is even with the outside
of the front wheels.
With the rear wheels in the wide position, the in¬
side of the rear wheels is even with the outside of
the front wheels.
BRAKE ADJUSTMENT
During normal operation of this machine, the
brakes are subject to wear and will require
periodic examination and adjustment.
Do not adjust the brake while the
engine is running. Be sure to block
the wheels of the tractor before
making the brake adjustment.
10

1. Loosen the lock nut. See figure 9.
2. Tighten the center boit all the way in.
3. Unscrew the center bolt one complete turn.
4. Test the brakes and repeat step three if
necessary.
5. Tighten the lock nut.
FIGURES.
CARBURETOR ADJUSTMENTS
(D
I
WARNING
If any adjustments are made to the
engine while the engine is running
(e.g. carburetor), disengage all
clutches and blades. Keep clear of
all moving parts. Be careful of
heated surfaces and muffler.
Minor carburetor adjustments may be required to
compensate for differences in fuel, temperature,
altitude and load.
Refer to separate engine manual for carburetor ad¬
justment information.
STEERING WHEEL ADJUSTMENT
Models 811, 823, 825, 833 and 835 only
There are four height positions for the steering
wheel. To adjust the height of the steering wheel,
remove the hairpin cotter and clevis pin on the
steering shaft. Place the steering wheel in the
position desired and secure with hairpin cotter
and clevis pin. See reference numbers 56 and 57
on page 26.
LUBRICATION
STEERING GEARS
Wipe off the old grease and dirt. After every 25
hours of operation place an automotive multi¬
purpose grease in the teeth of the segment and
pinion gears. See figure 10.
FIGURE 10.
TRANSAXLE
Check the oil level four times a year. Lubricant
should be at the point of overflowing. Use E.P. 90
oil. Drain and refill every two years. Capacity 4
pints. See figure 11.
FIGURE 11.
LINKAGE
Once a season lubricate all the pivot points on the
clutch, brake and lift linkage with SAE 30 engine
oil.
11

1
FRONT WHEELS
The front wheels are provided with grease fiitings.
Lubricate at least once a season with autonotive
multi-purpose grease.
PIVOT POINTS
Lubricate all pivot points with light oil at least
once a season.
BALL JOINTS
The ball joints and drag link ends are permanently
lubricated.
After the first two hours of operating a new
engine, drain the oil (see figure 10) from the
crankcase while engine is still hot and refill
crankcase with new oil; thereafter change the oil
after every 25 hours of operation. This procedure
ensures minimum wear of engine parts. To
change the oil, proceed as follows:
Step 1. Remove oil filler plug.
Step 2. Drain the oil.
Step 3. Replace oil filler plug.
Step 4. Refill crankcase with oil. Refer to
separate engine manual for quantity and
type of oil.
MAINTENANCE
WARNING
\
Disconnect the spark plug wire and
ground against the engine before
performing any adjustments, repairs
or maintenance.
TROUBLE SHOOTING
Refer to the chart on page 16 for trouble shooting
engine problems.
CRANKCASE OIL
To ensure maximum engine performance, pe rform
the following periodic maintenance:
Check the oil level in the crankcase before each
use of the machine and after every two ho jrs of
operation. Keep the oil level between ADD and
FULL. See figure 12.
FUEL SHUT-OFF VALVE AND FILTER
(Models 810, 822, 824, 834 and 836 Only)
The valve and filter is located on the bottom of the
gasoline tank located at the extreme rear of the
tractor.
Turn the valve knob in to shut off the fuel flow.
Turn the valve knob out to operate the tractor.
The entire valve can be pulled out to clean the
filter. When reassembling, place the rubber grom¬
met into the gasoline tank first, then push the
valve all the way in.
|i^^WAR*NlNG*
Only use factory approved parts if
repairs are needed on the gasoline
tank, grommet, valve or gasoline
line.
FUEL FILTER
(Model 811, 823, 825, 833 and 835 Only)
If your unit does not have a fuel shut-off valve, it is
equipped with a replaceable in-line fuel filter.
Replace filter whenever contamination or
discoloration is noticed. Order replacement filter
through your authorized engine service dealer.
WHEEL ALIGNMENT
The front wheels should toe-in approximately 1/8".
Measure the distances A and B on the front
wheels. See figure 13.
FIGURE 12.—16 H.P. Model Shown
12
Dimension B should be approx¬
imately 1/8 inch less than dimension
A.

To adjust the toe-in, loosen the hex jam nut,
remove the elastic lock nut, lift the tie rod end out
of the hole in the steering arm and screw the tie
rod end in or out as necessary. See figure 1 * 7 3 ^
Reassemble the tie rod end after the correct align¬
ment is made.
DRAG LINK
If the drag link or ball joints are changed, the new
assembly must be adjusted to the exact same
length as the original. If adjusted incorrectly, it
will allow the tractor to turn sharper one direction
than the other.
To take off the drag link, remove the nuts and lock
washers holding the ball joint to the steering gear
and left front axle bracket. See figure 14.
ENGINE
Refer to separate engine manual for all engine
maintenance procedures.
MAINTENANCE OF BATTERY
1. Check electrolyte level periodically (at least
every two weeks). Keep the level to the split
rings. Use only distilled water or a good quali¬
ty drinking water. Never add acid or any other
chemicals to the battery after initial activa¬
tion.
2. The battery should be checked with a
hydrometer after every 25 hours of operation.
If the specific gravity is less than 1.225, the
battery should be recharged. Maximum
charge rate 5 AMPS.
3. Coat the terminals and exposed wire with a
thin coat of grease or petroleum jelly for
longer service and protection against corro¬
sion.
4. The battery should be kept clean. Any
deposits of acid should be neutralized with
soda and water. Be careful not to get this solu¬
tion in the cells.
5. Avoid tipping the battery. Even a “sealed” bat¬
tery will leak electrolyte when tipped.
STORAGE OF THE BATTERY
1. Charge battery using normal methods.
NEVER store discharged battery as it will not
recover.
2. When storing battery for extended periods,
disconnect battery cables. Removing battery
from unit is recommended.
3. Store in cold, dry place.
4. Recharge battery whenever the specific gravi¬
ty is less than 1.225, before returning to ser¬
vice, or every two months, whichever occurs
first.
COMMON CAUSES FOR BATTERY FAILURE
1. Overcharging
2. Undercharging
3. Lack of water
4. Loose hold downs and/or corroded connec¬
tions
5. Excessive loads
6 . Battery electrolyte substitutes
7. Freezing of electrolyte
FIGURE 14.
13
These failures do not constitute
warranty.

BATTERY REMOVAL OR INSTALLATION
t
WARNING
When removing the battery, follow
this order of disassembly to prevent
your wrench from shorting against
the frame.
1. Remove the Negative cable
2. Remove the Positive cable.
To install a battery:
1. Attach the Positive cable.
2. Attach the Negative cable.
JUMP STARTING
1. Attach the first jumper cable from the Pc sitive
terminal of the good battery to the Pc sitive
terminal of the dead battery.
2. Attach the second jumper cable from the
Negative terminal of the good battery o the
FRAME OF THE UNIT WITH THE DEAD BAT¬
TERY.
I WARNING J
Failure to use this starting pro¬
cedure could cause sparking, and
the gases in either battery could ex¬
plode.
INSTALLATION OF TIRE TO RIM
®
I WARNING \
The following procedure must be
followed when removing or install¬
ing a tire to the rim.
1. Be sure rim is clean and rust free.
2. Lubricate both the tire and rim generously.
3. Never inflate to over 30 p.s.i. to seat beads.
Excessive inflation pressure when seating
beads may cause tire/rim assembly to burst
with force sufficient to cause serious injury.
BELT REMOVAL AND REPLACEMENT
Changing the Front Drive Belt
1. If a cutting deck is attached to your tractor,
remove it. Remove the battery.
2. Raise and block the front wheels of the tr actor
so you can work under it.
3. U n screw the belt guard release next to the
engine pulley. See figure 15.
FIGURE 15.
4. S wing the belt guard forward towards the
front of the tractor. See figure 16.
®
WARNING
Observe the way the belt is twisted.
If the new belt is installed back¬
wards, the tractor will run back¬
wards.
Belt Guard
FIGURE 16.

5. Using a bar or large screwdriver, pry the pulley
assembly towards the front of the tractor and
unhook the belt from the pulley. See figure 17.
6 . Install the new belt by hooking it over the
engine pulley and twisting the belt to the left
as you attach it to the pulley.
7. Test the operation of the tractor to make cer¬
tain the belt has been installed correctly.
5. T ake off the idler assembly by removing the
center bolt.
NOTE
Be sure the belt clip is reassembled
the same way. See figure 19.
FIGURE 17.
Removing the Rear (Clutch) Belt
1. If a cutting deck is attached to your tractor,
remove it. Remove the battery.
2. Raise and block the front wheels of the tractor
so you can work under It.
3. Depress the clutch-brake pedal and set the
parking brake.
4. Remove the two belt guard pins on the pulley
assembly. See figure 18.
FIGURE 19.
6 . Remove the center bolt and slide the trans¬
axle pulley off. See figure 20.
7. Reassemble In reverse order with a new
V-belt.
FIGURE 20.
FIGURE 18.
15

OFF SEASON STORAGE
If the machine is to be inoperative for a period
longer than 30 days, prepare for storage as fol¬
lows.
1. Clean the engine and the entire unit
thoroughly.
2. Lubricate all lubrication points. Wipe the en¬
tire machine with an oiled rag to protect the
surfaces.
3. Refer to the engine manual for correct engine
storage instructions. The engine mist be
completely drained of fuel to proven: gum
deposits from forming on essentiai carburetor
parts, fuel lines and fuel tanks.
4. Refer to battery storage instructions or page
13.
5.
Store unit in a clean, dry area.
CAUTION
When storing any type of power
equipment in an unventilated or
metal storage shed, care should be
taken to rust proof the equipment.
Using a light oil or silicone, coat the
equipment, especially any chains,
springs, bearings and cables.
16

TROUBLE SHOOTING CHART FOR ELECTRIC START MODELS
TROUBLE
LOOK FOR
REMEDY
Engine will not
crank
Battery installed incor¬
rectly
The battery must be installed with the negative, identified at the terminal post by (Neg, N or -),
grounded. The positive (Pos, P or -4-) attaches to the large cable from the solenoid. The small
red wire from the fuse holder or circuit breaker is also attached to the positive terminal.
Blown fuse or circuit
breaker
Replace fuse with 7V& amp. fuse V* x 1V4 " Ig. Circuit breaker will reset itself when it cools off.
Fuses or circuit breakers seldom open or fail without a reason. The problem must be cor¬
rected. Check for loose connections in the fuse holder. Replace fuse holder if necessary. A
dead short may be in the cranking or charging circuit where the insulation may have rubbed
through and exposed the bare wire. Replace the wire or repair with electrican’s tape if the wire
strands have not been damaged. Note: Look for a wire pinched between body panels, burned
by the exhaust pipe or muffler or rubbed against a moving part.
Battery is dead or weak
Use a hydrometer to check the condition of the battery. The Specific Gravity (s.g.) should be
1.265 at 80" F. (1.215 S.g. minimum needed for cranking engine). The reason for the battery fail¬
ing must be determined. (1) Defective battery. Battery will not accept or hold a full charge. (2)
Short circuit. Check for grounded wire. (3) Charging system not working, either engine alter¬
nator or trickle charger.
Trickle Charger. Check with multimeter. Charger 725-0578—input 120 V A.C., no load output
13.5 y D.C., rated load current 1 amp. Charger 725-0507—input 120 V A.C., no load output 17.4
V D.C., rated load current 1/2 amp.
Alternator (dual or single circuit) The charging system is an alternator located under the
flywheel. It is unregulated and rated 3 amp. at 3600 r.p.m. A diode (rectifier) is located in the
output lead just before the wire harness plug on the engine side.
Shrink
Diode Tube (Batt.)
1 \ 1 n —/ 7 AMP AC
T - 'L " T T ' —* /I amnel
Black
Wire Polarized
Plug
The diode changes A.C. to D.C. to charge the battery. A bad diode can either fail to charge the
battery or discharge the battery if the alternator is shorted as well as the diode. To test: (1)
Disconnect charger lead from the battery (small red wire). (2) Connect 12 V small test lamp be¬
tween the 3 amp. D.C. charge lead and the positive terminai of the battery. (3) With the engine
off, the lamp should not light. If it does, the diode and possibly the alternator should be re¬
placed. (4) Start the engine. The lamp should light. If it does not,the alternator (stator) or lead
wire is bad and should be replaced.
Mechanical failure.
(Wires and switches)
The interlock system includes two mechanical activated switches which are wired in series in
the circuit used to energize the starter solenoid. While testing the interlock system, you will
make the mower temporarily unsafe by permitting the engine to be started with the blade and
clutch engaged. WARNING: While testing, disengage the clutch, shut off the blade control, set
the parking brake and place the gear shift lever in neutral. Attach a wire (minimum 18 gauge) to
the positive terminal of the battery and touch the other end to the small terminal on the
solenoid. If the engine does not crank: (1) There is a loose connection or poor ground. (2) The
solenoid may be bad. The solenoid can be checked by using a heavy wire (#8 gauge minimum)
and jumping between the two large terminals. If the engine cranks, the solenoid is bad. (3) If
the engine does not crank when you jump the solenoid, have the starter motor tested by an
authorized engine dealer. If the engine does crank, the problem is with one of the safety
switches, ignition switch or the wire between the fuse holder (or circuit breaker) and the small
terminal on the solenoid. Note: Look for a poor connection at the switches or a defective
switch. Replace if necessary.
Engine cranks
but will not
start
Throttle or choke not in
starting position
Check owner’s guide for correct position for throttle control and choke (if separate control) for
starting.
17

I
TROUBLE SHOOTING CHART FOR ELECTRIC START MODELS
TROUBLE
LOOK FOR
REMEDY
No spark to spark plug
Spark plug lead disconnected. Connect lead. Hold spark plug lead away from engine block
about 1/8". Crank engine. There should be a spark. If not, have engine repaired at authorized
engine serv ce dealer.
Faulty spar c plug. To test, remove spark plug. Attach spark plug lead to spark plug. Ground the
spark plug jody against the engine block. Crank the engine. The spark plug should fire at the
electrode, f epiace if it does not.
No fuel to the carburetor
Gasoline ta ik empty. Fill.
Fuel valve s hut off. Open valve. Valve is located either at the bottom of the fuel tank or on the
carburetor.
Fuel line pli gged. Remove and clean.
Air filter dirty
If the air ckaner is dirty, the engine may not start. Clean or replace as recommended by the
engine man jfacturer.
Engine smokes
Engine loses crankcase
vacuum
Dipstick not seated or broken. Replace defective part.
Engine brea ther defective. Replace.
Excessive
vibration
Bent or damaged blade
spindle
Stop engine immediately. Check all pulleys, blade adapters, keys and bolts for tightness and
damage. Xij hten or replace any damaged parts.
Bent blade
Stop engine immediately. Replace damaged blade. Only use original equipment blades.
Mower will not'
discharge
grass or leaves
uncut strips
Engine speed low
Transmission selection
Blades short or dull
Throttle mu !t be set between 3/4 and full throttle.
Use lower tr msmission gear. The slower your ground speed, the better the quality of cut.
Sharpen or i epiace blades (uncut strip problem only).
18

NOTES
19

NOTE
This instruction manual covers
various models and all specifica¬
tions shown do not necessarily
apply to your model. Specifications
subject to change without notice or
obligation.