62
Maintenance Instructions
CHECKING/SERVICING
Transmission Control Setting
On
a
yearly
interval or when an outofadjustment
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 Tracking Adjustment -
Step 5
in this section.
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 by en
gag
ing the blade clutch (PTO), operating the engine
at full throttle, then disengaging the clutch and mea
suring how quickly the blades stop. Watch the rota
tion of the blade drive shaft 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 sys
tem malfunctions—blades do not stop in five (5) sec
onds—adjust or repair the brake before operating
the mower. Refer to
ADJUSTMENTS
for
Clutch
Disengagement/Brake Action,
Step 2 -
Blade Brake
Band Adjustment
on page 76.
PTO U-Joints
The PTO Ujoints should be inspected
yearly
for
looseness and wear. If either is noticed, the respec
tive shaft or tube should be replaced. A worn Ujoint
can cause vibration and extensive damage to the
PTO and the whole machine.
Safety Switch System
WARNING
It is important to check and maintain the
safety switch system for safe operation of
the machine.
There are four (4) safety interlock switches on the
tractor: Seat Switch, FSC NeutralPark Switch, PTO
Switch, and Parking Brake Switch.
NOTE:
There is a 1/2 second time delay function on
the seat switch to avoid engine power interruption
when driving over bumps.
If any of the following conditions occur during start
ing or operating, a safety interlock switch may be
malfunctioning. Contact your Walker dealer for trou
bleshooting and/or replacement.
● With or without an operator in the seat, the
engine starts
with the Forward Speed Control
(FSC) and/or the PTO engaged, or the parking
brake disengaged.
● With an operator in the seat and the parking
brake engaged,
the engine starts but dies
soon
after the parking brake is disengaged and the
Forward Speed Control (FSC) or PTO is en
gaged.
●
Without
an operator in the seat, the engine
starts and
continues to run
with the Forward
Speed Control (FSC) and/or PTO engaged, or
the parking brake disengaged.
● With an operator in the seat, the Forward Speed
Control (FSC) and PTO disengaged, the parking
brake engaged, and Oil Pressure Warning Horn
sounding, but the
starter will not engage.
