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TM 9-2320-270-10
KEY
CONTROL OR INDICATOR
FUNCTION/USE
CAUTION
Stop truck before shifting lever to
cause damage to drive train.
INTER-AXLE DIFFERENTIAL AND
TRANSFER CASE (DIFFERENTIAL
LOCK/UNLOCK CONTROL)
3
4
DIFFERENTIAL LOCK
INDICATOR
the lock position. Failure to do so could
Controls inter-axle differential and transfer
case differential. Center position is normal
operating position, allowing full differential
action to all three driving axles. For maxi-
mum traction in off-highway conditions,
stop vehicle then move lever to the LOCK
position to lock UP the driveline. When trac-
tion is back to normal, move the lever to the
UNLOCK position while the truck is mov-
ing. When the locking system disengages and
differential lock indicator goes off, return
the lever to the center position.
Red light indicates when differential LOCK/
UNLOCK control is in LOCK position and
driveline locking system is engaged.
TA220790
Change 3
2-11
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