TROUBLESHOOTING PROCEDURES - CONTINUED
TEST OR INSPECTION
DIFFERENTIAL LOCK CONTROL - CONTINUED
Turn machine SLIGHTLY while
If problem still exists, go to test step 2.
Differential Lock Control
decreasing engine RPM as an aid in
Will Not Disengage When
unlocking differential lock control.
Pedal Is Released.
Perform differential lock operation
observed during test step e, notify Unit
check as follows:
a. Start engine and allow air pressure to
reach 110 psi (758 kPa).
b. Lift empty bowl.
c. Release parking brake.
d. With tractor and scraper in a straight
position, slowly move machine while
tapping differential lock pedal.
e. Machine should not resist turning
when differential lock is released.
f. Release differential lock pedal.
Ensure STOP LIGHT or SER DRIVE
Select STOP LIGHT or SER DRIVE. If
Backup Alarm Will Not
problem still exists, go to test step 2.
function has been selected on military
Sound When Machine Is
Placed in Reverse.
Check for blown fuse #8 at fuse panel
If fuse is blown, request a replacement fuse
from Unit Maintenance. If fuse is okay, go
to test step 3.
Connect electrical connector, if required.
Check electrical connection at alarm,
If problem still exists, notify Unit Mainten-
located at rear of scraper under rear
Reconnect connector, if required. If
Check blackout drive light for separated
Blackout Drive Light Will
connector is okay, notify Unit
connection or damage.
Not Operate When B.O.
DRIVE Function Is