76
Maintenance Instructions
CHECKING/SERVICING
Transmission Control Setting
On a
yearly
interval or when an out-of-adjustment
condition is observed, check the transmission con-
trol for proper function as follows:
Neutral-Park
With the mower parked on level ground, start and
run the engine, first at idle and then normal operat-
ing speeds. With the FSC in the
NEUTRAL-PARK
position, there should be no movement of either
drive tire. If the tire(s) are “creeping” forward or re-
verse, refer to
ADJUSTMENTS
for the
Neutral
Function Adjustment - Step 3
in this section.
Straight Ground Tracking
Check for straight ground track by driving on a
smooth, level surface with hands off the steering le-
vers. Set the FSC at different speeds and observe
if the mower moves in a straight line (use a cement
joint or other line on the ground for reference). If the
machine is drifting to the right or left, refer to
ADJUSTMENTS
for
Straight Ground Travel Adjust-
ment - Step 4
in this section.
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 hos-
es 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 on GHS models) 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 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
for this service or refer to
ADJUSTMENTS
for
Clutch
Disengagement/Brake Action,
Step 3 -
Blade Brake
Band Adjustment
on page 91.
PTO U-Joints
The PTO U-joints should be inspected
yearly
for
looseness and wear. If either is noticed, the respec-
tive shaft or tube should be replaced. A worn U-joint
can cause vibration and extensive damage to the
PTO and the whole machine.
