CRANE - EMERGENCY OPERATION ROTARY CONTROL VALVE

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.

6-186