Safety Switch System; Forward Speed Control Friction Lock - Walker MBSY Operator's Manual

Maintenance Instructions

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.
If any of the following conditions occur during starting
or operating, a safety interlock switch may be mal-
functioning. Contact your Walker dealer for trouble-
shooting and/or replacement.
•
With 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 on 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 horn works,
but the starter is not engaging.
WARNING

Forward Speed Control Friction Lock

The FSC friction lock is designed to hold the select-
ed forward travel speed when the steering levers
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 friction
lock is as follows:
1. Place the FSC in the full FORWARD position
and pull both steering levers 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 move-
ment is "stiff", the friction needs to be de-
creased.
If the FSC friction lock needs to be adjusted, refer to
ADJUSTMENTS for Step 7 - Forward Speed Control
Friction Adjustment in this section.
CHECKING/SERVICING
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