1. REMOVAL AND INSTALL
Lower the work equipment to the ground
and stop the engine.
Operate the control levers and pedals
several times to release the remaining
pressure in the hydraulic piping.
Loosen the breather slowly to release the
pressure inside the hydraulic tank.
Escaping fluid under pressure can
penetrate the skin causing serious injury.
Remove the wirings for the pressure
sensors and so on.
Loosen the drain plug under the hydraulic
tank and drain the oil from the hydraulic
ÂHydraulic tank quantity : 190 ˶
Remove bolts (13) and disconnect pipe
Disconnect pilot line hoses (4, 5, 6, 7, 8,
Remove bolts(12) and disconnect pump
suction tube (3).
When pump suction tube is disconnected,
the oil inside the piping will flow out, so
catch it in oil pan.
Sling the pump assembly and remove the
pump mounting bolts.
ÂWeight : 155 kg (340 lb)
Pull out the pump assembly from housing.
When removing the pump assembly,
check that all the hoses have been
GROUP 3 PUMP DEVICE
Carry out installation in the reverse order
Remove the suction strainer and clean it.
Replace the return filter with a new one.
Remove breather and clean it.
After adding oil to the hydraulic tank to
the specified level.
Bleed the air from the hydraulic pump.
Remove the air vent plug (2EA)
Tighten plug lightly
Start the engine, run at low idling, and
check oil come out from plug.
Start the engine, run at low idling (3~5
minutes) to circulate the oil through the
Confirmed the hydraulic oil level and
check the hydraulic oil leaks or not.
2. MAIN PUMP (1/2)
04 Gear pump
111 Drive shaft (F)
113 Drive shaft (R)
123 Roller bearing
124 Needle bearing
127 Bearing spacer
141 Cylinder block
153 Set plate
157 Cylinder spring