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19
SECTION 10: MAINTENANCE
WARNING: Disconnect the spark plug
wire and ground against the engine before
performing any adjustments, repairs or
maintenance.
TROUBLE SHOOTING
Refer to the trouble shooting chart in section 14 for
engine problems.
ENGINE
Refer to the separate engine manual for engine
maintenance instructions.
Service air cleaner every 10 hours under normal
conditions. Clean every few hours under extremely
dusty conditions. To service the air cleaner, refer to
the separate engine manual packed with your unit.
The spark plug(s) should be cleaned and the gap
reset once a season. Spark plug replacement is
recommended at the start of each mowing season;
check engine manual for correct plug type and gap
specifications.
Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and
follow instructions carefully.
Oil Drain Sleeve
Your lawn tractor has a plastic oil drain sleeve
packed with the loose parts for your convenience in
draining oil from the crankcase. To drain the oil,
snap small end of oil drain sleeve onto oil sump. See
Figure 22. Remove drain plug and drain oil into a
suitable container.
Figure 22
FUEL FILTER
Your unit 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.
CLEANING ENGINE AND DECK
Any fuel or oil spilled on the machine should be
wiped off promptly. Grass, leaves, and other dirt
must not be left to accumulate around the cooling
fins of the engine or on any part of the machine.
Clean the underside of the deck after each mowing.
CUTTING BLADES
A. REMOVAL FOR REPLACEMENT OR
SHARPENING
WARNING: Be sure to disconnect and
ground the spark plug wire(s) and remove
ignition key before working on the cutting
blade to prevent accidental engine starting.
Protect hands by using heavy gloves or a
rag to grasp the cutting blades.
1. Remove the hex flange nut which holds the
blade to the blade spindle.
2. Remove the blade from the spindle.
B. SHARPENING
Remove the cutting blades by following the
directions of the preceding section.
When sharpening the blades, follow the original
angle of grind as a guide. It is extremely important
that each cutting edge receives an equal amount of
grinding to prevent an unbalanced blade. An
unbalanced blade will cause excessive vibration
when rotating at high speeds, may cause damage to
the mower and could break, causing personal injury.
The blade can be tested for balance by balancing it
on a round shaft screwdriver. Remove metal from
the heavy side until it balances evenly.
C. REASSEMBLY
When replacing blades, be sure to install the blade
with the side of the blade marked ‘‘Bottom’’ (or with
part number) facing the ground when the mower is in
the operating position. Carefully align “star” on blade
with “star” on spindle. Secure with hex flange nut.
BLADE MOUNTING TORQUE
Hex Flange Nut: 840 in. lb. min., 1080 in. lb. max.
To ensure safe operation of your unit, all nuts and
bolts must be checked periodically for correct
tightness.
Oil Drain
Sleeve
Sump
Oil