73 4000670450 E 04.19 USA / GB
D
- Operation instructions
3632T - HTT13
5.1.1 - Manual Boom Operation
Manual retraction, rotation and lowering functions allow the booms to be moved and lowered
during hydraulic power interruption or failure.
The following procedures for manual retraction, rotation and lowering require a person on the
ground to operate the manual controls and hand pump.
The hydraulic hand pump is located in the pump compartment. In case of a power failure, the
hand pump and selected hydraulic valve can be used to manually retract the booms or rotate
the boom turntable.
To begin manual retraction or rotation, turn the proportional valve clockwise until it stops, and
insert pump handle into the pump handle fitting.
Manual lowering of the boom and platform may also be performed by actuating the valve
plunger found on the base of each boom lift cylinder.
Pushing in and holding the valve "button" on the appropriate cylinder retracts that cylinder,
thereby retracting that part of the boom.
5.1.1.1 - Manual retraction
To begin manual retraction or rotation, turn the proportional valve clockwise until it stops, and
insert pump handle into the pump handle fitting. Pushing and holding the RETRACT
button ( 1 ) while simultaneously actuating the HAND PUMP ( 2 ) will retract the secondary
boom.
5.1.1.2 - Manual rotation
To rotate the TURNTABLE counterclockwise (CCW) :
• Push and hold the ROTATION button ( 3 ) IN.
• Simultaneously actuate the HAND PUMP ( 2 ).
To rotate the TURNTABLE clockwise (CW) :
• Pull the ROTATION button ( 3 ) OUT.
• Simultaneously actuate the HAND PUMP ( 2 ).
N.B.-:-T
URN THE PROPORTIONAL VALVE ( 4 ) COUNTERCLOCKWISE TO RETURN IT TO ITS
ORIGINAL
POSITION BEFORE LOWERING THE BOOMS OR RESUMING NORMAL OPERATION.
Hand Pump Controls for Manual Operation
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