TM 5-3810-307-10
5-6.12
Traveling - Reverse.
CAUTION
Apply the Brake Foot Pedal (13, Figure 5-2) and
bring the crane to a complete stop before shifting the
transmission into reverse.
Traveling in reverse is accomplished the same way as traveling forward (see
above), except for shifting the Transmission Shift Lever (48) to the reverse (R) gear desired.
5-6.13
Four-Wheel (4WD) Drive Operation. If more traction is required due to slipping or
spinning wheels, engage the rear axle drive. Engage 4WD as follows:
a.
Position the DRIVE AXLE Selector Switch (37, Figure 5-2) to the 4WD
position.
NOTE
Crane must be traveling at a speed below 11 mph
(18 kph) for 4WD to engage and remain engaged.
b.
Return the DRIVE AXLE Selector Switch (37) to the 2WD position as soon
as 2WD traction will suffice.
5-6.14
Inter-axle Differential. To lock the inter-axle differential and achieve maximum
pulling power when approaching slippery or poor road conditions, proceed as follows:
CAUTION
The differential lock can only be engaged when 4WD
is active. Do not actuate the DIFFERENTIAL LOCK
Switch (33, Figure 5-2) while the wheels are actually
slipping or spinning.
a.
Position DIFFERENTIAL LOCK Switch (33) to LOCKED position to lock the
front and rear differentials, while maintaining crane speed [below 11 mph (18
kph)].
b.
Let up momentarily on accelerator. This will engage the differential lock.
c.
Use extreme caution when driving over rough terrain.
As soon as driving conditions improve, perform the following:
a.
Position DIFFERENTIAL LOCK Switch (33) to the UNLOCKED position
while maintaining crane speed.
b.
Let up momentarily on accelerator to allow the shift.
c.
Resume driving at a safe speed.
5-76
