Blade Brake Action; Pto U-Joints; Safety Switch System; Forward Speed Control Friction Lock - Walker T27i Operator's Manual

Maintenance Instructions

Blade Brake Action

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 indica-
tion 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 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

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.
WARNING
WARNING
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 difficult (too much
friction). The procedure for checking the FSC fric-
tion lock is as follows:
1. With the engine off, place the FSC in the full
FORWARD position and pull both steering le-
vers back; the FSC lever 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.
CHECKING/SERVICING
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