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Maintenance Instructions CHECKING/SERVICING
Drive Belts
Raise the body and inspect the condition of the three
(3) drive belts after every 25 hours of operation --
engine, PTO drive, and ground drive. If the belts
show signs of cracking or deteriorating, the belts
should be replaced. Refer to REPLACING/RE-
PAIRING the Drive Belts in this section.
Mower Deck Gearbox Oil Seals
The mower deck gearbox seals should be inspected
every 25 hours for evidence of oil leaking; particu-
larly the lower oil seal on the blade drive gearbox.
This seal is protected by the trash guard on the blade
hub and seal protector plate on the housing, but is
still vulnerable to seal damage due to operating in
an adverse environment. The mower blade must be
removed for inspection of the seal, so it is recom-
mended to inspect the gearbox seals when blades
are removed for sharpening. If an oil leak is noted,
the seal should be replaced and the gearbox as-
sembly relubricated. Refer to LUBRICATION for
Mower Deck Gearbox Lubrication in this section.
Spark Plug
Every 100 hours, remove the spark plug, inspect,
clean, and reset the gap (or replace with a new
plug). Clean spark plug with a wire brush. If the
electrodes are burned short or pitted, replace the
plug (refer to Specications for the proper type of
replacement plug). Check the spark plug gap with
a wire-type feeler gauge and set the gap between
0.028 and 0.032 in. (0.7 and 0.8 mm). Reinstall and
tighten to 17 lb·ft (23 N·m).
Ignition
The Subaru engine is equipped with an electronic
ignition. No breaker points, maintenance, or adjust-
ments are necessary with this system. Contact an
authorized Subaru engine dealer in case of ignition
failure.
Fuel Lines and Clamps
Every year, inspect the fuel line from the tank to
engine for deterioration or damage. Also, inspect
the fuel line clamps for tightness. Good preven-
tive maintenance calls for complete replacement of
fuel lines and clamps every two (2) years.
Blade Brake Action
WARNING
It is important to check and maintain blade
brake action for safe operation of the ma-
chine.
Check the function of the cutter blade brake and
blower brake by engaging the blade clutch (PTO),
operating the engine at full throttle, then disengaging
the clutch and measuring how quickly the blades
stop. Watch the rotation of the blade drive shaft and
blower pulley as a visual indication that movement
has stopped. If the brake is working properly, all
rotation will stop ve (5) seconds after disen-
gagement of the clutch. If the brake system mal-
functions - blades do not stop in ve (5) seconds -
adjust or repair the brake before operating the
mower. Refer to Blade Brake Band Adjustment in
ADJUSTMENTS in this section, or contact your au-
thorized Walker dealer for this service.