Walker R21 - Check FSC Friction Lock; Check Transmission Control Settings; Check Neutral-Park Position; Check Straight Ground Tracking

Maintenance R21
48
Check FSC Friction Lock
Frequency: Yearly
The Forward Speed Control (FSC) is designed to
have enough friction to hold the selected for-
ward travel speed when the steering levers are
moved and yet not so much as to make moving
the FSC control difcult.
1. With the engine off, 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 steer-
ing levers are pulled back, the friction needs to
be increased.
Pull Steering
Levers Back To
Check Friction
Lock
FSC in Full
Forward Position
FSC Friction Adjustment Test
2. With the steering levers pulled 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, refer
to “Forward Speed Control Friction Adjustment”
on page 56 or contact your Walker Dealer.
Check Transmission Control
Settings
Frequency: Yearly (or when an out-of-adjustment
condition is observed)
Check Neutral-Park Position
With the mower parked on level ground, start
and run the engine, rst at idle and then normal
operating 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 reverse, refer to “Neutral Function Adjustment”
on page 57.
Check Straight Ground Tracking
Check for straight ground track by driving on a
smooth, level surface with hands off the steer-
ing levers. 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 refer-
ence). If the machine is drifting to the right or left,
refer to “Straight Tracking Adjustment” on page
58.
Check Fuel Lines and Clamps
Frequency: Yearly
Inspect the fuel supply line from the tank to engine
for deterioration or damage. Also, inspect the fuel
line clamps for tightness. Good preventive main-
tenance calls for complete replacement of fuel
lines and clamps every two (2) years. If your lines
need to be replaced, contact your local Walker
Dealer.