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Install - TM-5-5420-279-230929
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Illustration - TM-5-5420-279-230931
TM 5-5420-279-23
CRANE - EMERGENCY OPERATION ROTARY CONTROL VALVE
This task covers:
a. Remove
b. Install
INITIAL SETUP:
Tools Required
Tool Kit, General Mechanic's, Automotive (GMTK)
Materials Required
Nyloc nut (Qty 1)
Equipment Conditions
None
WARNING
SLIP AND FALL INJURY. PERSONNEL MAY SLIP ON SPILLED HYDRAULIC
FLUID. SUITABLE CONTAINERS AND FLUID ABSORBENT MATERIALS ARE TO
BE USED TO CONTAIN SPILLAGE.
NOTE
The emergency rotary control valve is located on the right hand side of the operator's
crane control block. This valve has two settings, 'normal operation' and 'emergency
operation'. The control valve should only be set for 'emergency operation' if the crane's
electrical system has failed, so that in the event of such a failure the crane boom and
extensions can be folded. The valve should always be in the 'OFF' up position (vertical)
and wire locked in place.

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