BigDog Series X, General Service Manual

Page: 13 / 41

108936BD_0812 5-1 REV E
POWER UNIT MAINTENANCE
Steering Adjustments
Steering control lever neutral adjustment
The mower’s steering has been factory adjusted to eliminate
creeping when the steering control levers are in the neutral posi-
tion. However, should the mower begin to creep, the steering
control lever linkage can be adjusted.
Before considering any adjustment, check the tire air pressure.
Unequal tire pressure will cause the mower to drift to one side.
Refer to tire pressure information in the
Tires section for
detailed information.
NOTE:
Proper park brake adjustment must be completed
before the steering control lever neutral adjustment can be done.
Refer to the
Park Brake Spring Adjustment section for detailed
information.
Fine adjustment to the unit’s steering is made with the trans-
mission’s control rod.
Neutral is properly adjusted when the steering control levers
are in the park brake position and the transmissions do not
“whine”.
If this occurs, the steering control linkage may be adjusted as
follows:
1. Raise the rear of the mower and block with certified jack
stands. The rear wheels need to be able to rotate freely
and clear of all obstructions.
2. Chock the front tires.
3. Raise the seat platform and disconnect the mower harness
from the seat switch. Bypass the seat switch by
connecting the two mower harness female spades
together. Figure 5-1
4. Start the engine.
5. Position the steering control lever in the neutral position
and observe which way the wheels are rotating. Figure 5-
2
6. If wheel(s) are rotating forward, loosen the jam nuts on
the pump linkage rods and rotate the rod to lengthen the
steering control linkage until the wheel(s) come to a stop.
Figure 5-3
7. Repeat for the opposite side if necessary.
WARNING
This procedure will require that the unit be raised and
blocked up off of the ground. It is necessary for the
wheels to rotate without coming in contact with the floor
or any object that would permit the unit to propel itself.
Stay clear and exercise caution when rotating wheels to
prevent injury. Use only appropriate vehicle stands, with
a minimum weight rating of 2000 pounds to block the
unit up. Use in pairs only. Follow the instructions sup-
plied with the vehicle stands.
WARNING
Keep hands, hair, clothing, etc., clear of the cooling fans
on top of the transmissions. Exercise extreme caution.
WARNING
Untrained maintenance personnel should never attempt to
make any adjustments or repairs to the mower’s drive
system while the engine is running.
The following proce-
dures should be performed by trained maintenance
personnel only.
Figure 5-1
Figure 5-2
Mower
harness
Seat
switch
Female
spades
Park
brake
slot
Steering
control
lever
Steering control lever in neutral position