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Maintenance Instructions CHECKING/SERVICING
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 ve (5)
seconds after disengagement of the clutch. If the
brake system malfunctions - blades do not stop in
ve (5) seconds - adjust or repair the brake before
operating the mower. Contact your Walker dealer
for this service or refer to the Walker Service Manual.
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.
Safety Switch System
WARNING
It is important to check and maintain the
safety switch system for safe operation of
the machine.
There are three (3) safety interlock switches on the
tractor; Seat Switch, FSC Neutral - Park Switch, and
PTO 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.
• With an operator in the seat, the engine starts but
dies soon after the Forward Speed Control (FSC) or
PTO is engaged.
• Without an operator in the seat, the engine starts
and continues to run with the Forward Speed Control
(FSC) and/or PTO engaged.
• With an operator in the seat, the Forward Speed
Control (FSC) and PTO disengaged and panel horn
sounding, the starter will not engage.
Forward Speed Control Friction Lock
The FSC friction lock is designed to hold the se-
lected forward travel speed when the steering le-
vers are moved and yet the friction is not too heavy
to make moving the FSC control difcult (too much
friction). The procedure for checking the FSC fric-
tion lock is as follows:
1. Place the FSC in the full FORWARD position
and pull both steering levers back; the FSC le-
ver should not move. If the FSC lever moves
back when the steering levers are pulled back,
the friction needs to be increased.
2. With the steering levers held back, move the
FSC lever back from the FORWARD position.
With a proper amount of friction adjusted, the
FSC lever should move back with a slight
amount of resistance (friction). If the FSC lever
movement is “stiff”, the friction needs to be
decreased.
If the FSC friction lock needs to be adjusted, contact
your Walker dealer or refer to the Walker Service
Manual.