Filter
Top Products
Maintenance Instructions CHECKING/SERVICING
58
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 gear-
box. 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 operat-
ing in an adverse environment. The mower blade
must be removed for inspection of the seal, so it is
recommended to inspect the gearbox seals when
blades are removed for sharpening. If an oil leak
is noted, the seal should be replaced and the gear-
box assembly relubricated. Refer to Mower Deck
Gearbox Lubrication in this section.
Spark Plugs
Every 200 hours of operation, remove the spark
plugs, inspect, clean, and reset the gap (or replace
with new plugs). Before removing the spark plugs,
clean the area around the base of the plugs to keep
dirt and debris out of the engine. Clean spark plugs
with a wire brush. DO NOT use an abrasive grit type
cleaner. If the electrodes are burned short or pitted,
replace plugs with Champion
type RC12YC (or
equivalent). Check spark plug gap with a wire-type
feeler gauge and set the gap at 0.030 in. (.76 mm).
Reinstall and tighten to between 18 and 22 ft-lb
(24.4 to 29.8 N
⋅m).
Fuel Lines and Clamps
Every year, inspect the fuel supply line from the tank
to engine for deterioration or damage. Also, inspect
the fuel line clamps for tightness. Good preventive
maintenance calls for complete replacement of fuel
lines and clamps every two (2) years.
Engine Starter
Yearly or every 500 hours disassemble and clean
the solenoid shift starter. Refer to the Kohler Service
Manual for this procedure or contact an authorized
Kohler engine dealer to perform this service.
Engine Valve Clearance
Yearly or every 500 hours, check and adjust the
Kohler engine valve clearance. Refer to the Kohler
Service Manual for specifications and procedure to
check the valve clearance or contact an authorized
Kohler engine dealer to perform this service.
Blade Brake Action
Check the function of the cutter blade brake (and
blower brake on GHS models) by engaging the
blade clutch (PTO), operating the engine at full throt-
tle, 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 indi-
cation that movement has stopped. If the brake is
working properly, all rotation will stop five (5)
seconds after disengagement of the clutch. If the
brake system malfunctions - blades do not stop in
five (5) seconds - adjust or repair the brake before
operating the mower. Refer to ADJUSTMENTS of
Blade Clutch (PTO) in this section.
WARNING
It is important to check and maintain blade
brake action for safe operation of the ma-
chine.