The pump and pump drive are shown in Figure 3-19.
(1) Reduce the pressure of the fuel tank
When disassembling the hydraulic line or changing the hydraulic circuit, stop the engine and press the rubber plug on the air vent. When the pressure is completely relieved, the disassembly is carried out. When filling hydraulic oil, remove the cover of the oil return filter.
As shown in Figure 3-20, be careful not to get burned by the sprayed oil when removing the filter plug. Stop the engine before removing the filter plug. Then press the rubber plug on the bleed valve until the pressure in the fuel tank is completely relieved
(2) Remove all pipes and hoses on the pump
[note]
①Before removing the pipeline and hose, make a mark on the pilot hose.
② Before removing the hose, drain all the oil from the oil tank.
(3) Bind the pump with steel wire rope
Lift it with a crane, and then remove the bolts connecting the pump to remove the pump from the engine (pump weight: 126kg).
(4) Remove the hex bolt from the engine, and remove the coupling from the engine
(5) Check the coupling for cracks or other damage,
(6) Install the pump device Install the pump in the reverse order of removing the pump. Pay attention to the following points during installation.
① The tightening torque of the coupling bolt is 216N·m. Check if loosening screws are used
②Before tightening the nut, wipe off all traces of oil and grease on the thread, and make sure to use loosening locking screws.
