HWH 110 Series, Operator'S Manual

MP45.2

15MAY97

MAINTENANCE

HYDRAULIC CONTROL VALVE ADJUSTMENT

Two parts of the control valve are possible to adjust. The proper
adjustments for these parts are made at the factory, so readjust-
ments will rarely be necessary.                                                

non-warranty basis.  If the valve needs to be repaired or adjusted
under warranty, the complete valve unit should be replaced,
but not the light panel.                                                           

The following procedures are recommended to adjust them if
the need arises.                                                                            

1. ADJUSTMENT OF THE DETENT PLATE: Adjustment of
the detent plate is necessary if the detent plate fails to hold
the control levers in the retract position, or if the plunger is not

2. ADJUSTING THE MICRO SWITCH: The micro switch will
need adjusting if the activating rod does not fall directly upon
the nipple of the micro switch.                                               

MICROSWITCH

SPACER

PLATE

SPACER

SPRING

SPACER

PIVOT ROD

ACTIVATING

PLASTIC

SNAP RING

DETENT
PLATE

VALVE
HANDLE

ROD

PIVOT ROD

PLUNGER

NOTE: These valve adjustments should only be made on a

depressed sufficiently by the valve handle in the retract posi-
tion.

To adjust the detent plate, loosen the nuts which hold the plas-
tic valve box and the detent plate to the valve assembly.  The
proper adjustment can be made by moving the detent plate up
or down to a point where the valve handle is resting solidly on the

detent in the retract position, yet holding the plunger down to it’s
full extent or no less than 1/16" of this extension.

The adjustment must be made after disassembling a portion
of the control valve.  First, remove the plastic valve box and
the detent plate.  Next, remove the snap rings on the pivot
rod, and carefully slide off the valve handles spacers and
spring, notice where each part must go during reassembly.

The micro switch is the ajdusted by loosening the small hex
nuts which hold the micro switch to the pivot plate, and then
making the proper adjustment.

NOTE: Sometimes the activating rod can be bent to position
the micro switch correctly.

Finally, reassemble the control valve, remembering to prop-
erly adjust the detent plate as it is replaced.

VALVE

ROD

4 LEVER HYDRAULIC CONTROL VALVE