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Maintenance Instructions CHECKING/SERVICING
Blade Balanced on Magnetic
Wall-Mounted Balancer
7. Mount the blade with wing tips pointing up into
the housing. Reinstall the blade, washer, lock
washer, and nut. Tighten the nut to 60 ft-lb
(81.3 N·m).
NOTE: When reinstalling blades on GHS models,
remember, the blades turn toward each other
(counter-rotate) and the RH and LH blade cannot be
switched. Check for proper blade rotation before in-
stalling blades on the deck. Refer to Blade Rota-
tion for GHS Mower Deck illustration shown in
Clogging Checklist in Operating Instructions for
correct blade rotation.
Drive Belts
Raise the body and inspect the condition of the five
(5) belts (4 belts on SD models) every 25 hours of
operation - engine PTO drive, jackshaft drive, hydro-
static ground drive, GHS blower drive, and engine
fan belt. If the belts show signs of cracking or de-
teriorating, the belts should be replaced. Refer to
REPLACING/REPAIRING 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 ad-
verse environment. The mower blade must be re-
moved 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 gearbox
assembly relubricated. Refer to LUBRICATION for
Mower Deck Gearbox Lubrication in this section.
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.
NOTE: This procedure is of special importance for
the diesel engine due to poor performance when air
is injected with the fuel.
Radiator Hoses and Clamps
Inspect the radiator hoses every 200 hours for de-
terioration or damage. Also check the tightness of
the hose clamps. Good preventive maintenance
calls for complete replacement of the radiator hoses
and clamps every two (2) years.
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. Contact your Walker Dealer.
Blade Balancer
WARNING
It is important to check and maintain blade
brake action for safe operation of the ma-
chine.