TM 5-3805-248-10
TROUBLESHOOTING PROCEDURES - CONTINUED
0012 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
DIFFERENTIAL LOCK CONTROL
1.
Observe air pressure gage for an
If air pressure indication is normal, go to
1.
Differential Lock Control
test step 2. If air pressure indicator is below
indication of 110 psi (758 kPa).
Will Not Engage When
normal, notify Unit Maintenance.
Pedal Is Pressed.
WARNING
Park machine on level ground, stop engine, and lower bowl to prevent injury to operator and/or severe
damage to machine.
2.
Check for mud or other debris under
Clean mud or debris from pedal area. If
problem still exists, go to test step 3.
pedal.
3.
Perform differential lock operation
If problem still exists, or if no resistance
was observed during test step f, notify Unit
check as follows:
Maintenance.
a. Start engine and allow air pressure to
reach 110 psi (758 kPa).
b. Lift empty bowl.
c. Release parking brake.
d. With engine at low idle speed, use
steering wheel to turn machine
SLIGHTLY to left and right while
slowly moving forward.
e. With tractor and scraper in a straight
position, push and hold differential
lock pedal down.
f. Repeat step d. Machine should resist
turning when differential lock is
engaged.
g. Release differential lock pedal.
