TM 5-3810-231-12
I. To Steer When Propelling the Machine. When
g. To Hold the Load. Allow the main hoist lever to
the steering control lever is in the center position both
return to neutral and apply main hoist brake.
crawlers are engaged and the machine will travel straight
forward or backward. With the front of the upper over the
Warning
front of the lower (propel) chains are in the rear of the
Never leave the crane with bucket or
lower) push the lever forward toward the operator to
any crane load in a raised position.
engage the lefthand crawler and the machine will travel to
The brake may loosen just enough to
the right. When the lever is pushed back away from the
cause the load to fall on personnel or
operator, the machine will travel to the right. When the
equipment.
lever is pushed back away from the operator, the machine
)will travel to the left. The crawlers can be "cut" in either
h. To Lower the Load (Power Lowering). Push the
direction from either position of the steering control lever
main hoist lever away from the operator. This applies
by reversing the direction of travel of the machine.
power to the main hoist drum through the planetary
gearing. Drum rotation is reversed to lower the load.
19. Operation in Extreme Cold (below 0 .)
F
i. To Raise or Lower a Load Attached to the Jib
Hoist Line (Whip Line). Pull the secondary hoist lever
a. See that antifreeze solution is correct for the
toward the operator. The secondary hoist drum is not
lowest temperature expected.
equipped with planetary lowering. To lower the load
b. Inspect cooling system. Correct or report any
return the hoist lever to the neutral position and apply just
leaks.
enough pressure to the secondary hoist brake pedal to
c. Keep batteries fully charged. After adding water
slip the brake on the secondary hoist drum, and lower the
to the batteries, run the engine for at least one hour.
load by gravity.
d. Keep the fuel tank filler cap tight to prevent water
j. To Swing the Load. Release swing brake lock
from entering the fuel tank. Service the fuel tank
and disengage swing lock. Pull swing clutch lever toward
frequently to prevent condensation in the tank and lines.
the operator to swing the machine to the right. Push this
lever away from the operator to swing the machine to the
left. When the load has reached the desired position
f. Lubricate in accordance with the current
allow swing clutch lever to return to neutral and apply
lubrication order.
swing brake by pushing swing brake lever away from the
g. Allow engine to reach normal operation
operator.
temperature before applying load.
k. To Propel the Machine Forward or Backward.
When the propel lever is in neutral position the propel
20. Operation in Extreme Heat
brakes are set. Push this lever forward away from the
operator, which will release the spring set brake a n d
a. Inspect cooling system to see that it is clean and
engage the travel clutch. The machine will travel forward.
free flowing. Keep coolant level in radiator as high as
Bringing the lever back to the neutral position will
possible.
disengage the travel clutch and set the propel brakes.
b. Keep radiator fins free of insects, leaves, dirt and
Push the lever to the left and pull back to travel in
other obstructions.
reverse.
c. Keep fan belt adjusted properly and see that there
is no obstruction of air to the fan.
Caution
Do not move the lever from forward to
d. Open all sliding panels of the cab to provide as
reverse position too rapidly as starting
much ventilation as possible.
the travel clutch should be gradual to
e. Keep the fuel tank filler cap tight to prevent water
allow the jaws to engage.
from entering the fuel tank. Service the fuel tank
frequently to prevent condensation in the tank and lines.
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