of Medium Wrecker Trucks.
a. General. Medium wrecker trucks covered in this manual are equipped with a hydraulically
operated, engine driven crane and a rear winch. The crane is capable of 360 rotation and
approximately 45 elevation. The crane boom is extendable from 10 to 18 feet. Maximum
lifting capacity with outriggers installed is 10,000 pounds. Refer to para 2-22 for description
and operation of rear winch.
General instructions for winching, towing and lifting are given in FM 20-22.
b. Positioning Wrecker. Position the
wrecker on firm, level ground whenever
possible. Determine which type of lifting is
necessary (i.e., rear lift, lift andswing, heavy
rear lift or a heavy side lift) and position the
wrecker accordingly. For heavy loads, the
wrecker should be positioned for a direct
rear lift with the least amount of boom
Refer to the safe load data plate
located near the crane controls.
Select the lifting method (with
or without outriggers) and crane
radius that will permit crane
operation within safe limits
while lifting the load. Position
the wrecker close enough to the
load to operate the crane at the
radius you have selected.
c. Crane Operation.
(1) To set electric brake lock, depress
brake pedal (8), push inlock switch button
(3), and release brake pedal.
Do not use electric brake lock
when parking for a long period
(2) Start the engine, depress clutch
pedal (9) and place gearshift lever (4) in
5 (fifth) for M62 or 4(fourth) for M543.
Place transfer shift lever (7) in N(neutral)
position, release safety lock(6) and move
divider control lever (5) to ENGAGE
position. Release clutch pedal.