Straight Ground Travel Adjustment - Walker D21d Operator's Manual

Maintenance Instructions
3. Start the engine (operate first at idle and then
normal operating speeds) and check for move-
ment of the drive wheels.
NOTE: If the engine will not start, check the
operation of the neutral safety switch.
NEVER attempt to disconnect any safety
devices or defeat the purpose of these
safety devices.
Neutral Function Adjustment
4. If drive wheels are moving, adjust the FSC
neutral stop by adjusting the FSC actuator rod
(see Neutral Function Adjustment photo). If
the drive wheels are moving backward, loosen
the jam nut and lengthen the FSC actuator rod
by turning the adjustment nut counterclockwise
(CCW). If the drive wheels are moving forward,
use the opposite clockwise (CW) adjustment.
86
CAUTION
FSC Actuator
Rod
Adjustment
Nut
5. At this point it may not be possible to adjust
both wheels stationary since the differential ad­
just has not been made. (This is covered by the
Straight Ground Travel Adjustment - Step 5). In
this case, the neutral adjustment should be
made for one wheel stationary and the other
moving forward slightly.
Check the neutral safety switch for closure
6.
and function with the FSC in neutral (the engine
will not start when the switch is open).
Straight Ground Travel Adjustment - Step 5
1. Sit in the seat, start the engine (operate at nor­
mal speed), and with the FSC in the NEUTRAL-
PARK position, check for forward movement
of either drive wheel (if either wheel moves
backward, refer back to Neutral Function Ad-
justment - Step 4 and readjust). Tighten the
steering lever adjustment nut on the side of
the mower with the wheel moving forward
until wheel movement stops.
2. Check for straight ground track on a level sur-
face (with hands off the steering levers). Set
the FSC at several different speeds and ob­
serve if the mower moves in a straight line (use
cement joint or other line on the ground for ref­
erence).
3. If travel is not straight, tighten the adjustment
nut that is on the same side of the mower as
the wheel that is moving too fast, e.g., the
mower tracks to the right, indicating the LH
wheel is moving too fast, tighten the LH adjust­
ment nut.
End Wrench on
Adjustment Nut

Straight Ground Travel Adjustment

ADJUSTMENTS