MAINTENANCE
MP44.0009
15JAN10
PRIMING THE HAND PUMP
JACK CONTROL HYDRAULIC SWITCH
NEUTRAL POSITION
To prime the hand pump, it will be necessary to remove a
hose from one of the jacks. One of the front jacks would be
HAND PUMP
HANDLE
MOTION
OPERATING
If the system has Double-Acting cylinders on the front,
remove the rod end hose from either of the front jacks.
Place the end of the hose in a bucket. Make sure the
tank is at least half full. Pump the hand pump until a
healthy flow of oil is coming from the hose.
Reattach the hose and retry the hand pump. Repeat the
procedure if the hand pump does not move the jacks.
TANK
best, but use the easiest hose to get to.
IMPORTANT: DO NOT ALLOW THE FLUID LEVEL IN
THE TANK TO LOWER MORE THAN 1 INCH BEFORE
ROD END
CAP END
ADDING FLUID.
If the system has only Single-Acting jacks with return springs,
remove the easiest hose to access and place the end in a
bucket. Using the release cam, manually open the EXTEND
solenoid valve for that jack (if equipped with solenoid valves)
or move the jack control hydraulic switch to "EXTEND" for
that jack. Make sure the tank is at least half full. Pump the
hand pump until a healthy flow of fluid comes from the hose.
procedure if the hand pump does not move the jacks.
Reattach the hose and retry the hand pump. Repeat the
THE TANK TO LOWER MORE THAN 1 INCH BEFORE
IMPORTANT: DO NOT ALLOW THE FLUID LEVEL IN
ADDING FLUID.
EXTEND
POSITION
TO
CLOSED
HANDLE
HAND PUMP
TANK
EXT
RET
EXTEND SOLENOID VALVE
SINGLE ACTING JACKS
(CAP END HOSE -
EXT
EXT
EXT
EXT
RET
RET
RET
RET
OPEN
CLOSE
TO
VALVE RELEASE CAM
SHOWN IN
POSITION
OPEN
POSITION
SHOWN IN
(CAP AND ROD END HOSES)
DOUBLE-ACTING JACKS
NO ROD END HOSE -
WITH RETRACT SPRINGS)
