TM 9-2320-272-24-1
1-24. HYDRAULIC SYSTEM OPERATION (Contd)
d. Medium Wrecker Crane Hydraulic System Operation.
The M936/A1/A2 medium wrecker is equipped with a hydraulically-operated crane that extends a
maximum 18 ft (5 m), elevates 45 degrees, and swings 360 degrees. It is capable of lifting loads up to
20,000 lbs (9,090 kg).
(1) The crane hydraulic system converts power of the engine into fluid power for use by the hydraulic
pump. At this pump, oil pressure is supplied to different crane control valves: BOOM, HOIST, CROWD, and
SWING. Each of these crane actions are dealt with separately. The major components for raising and
lowering the wrecker boom are:
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