U20-3, U25-3 WSM Hydraulic system (Service section)
IV-S-47
[4]Disassembling and reassembling the pump.
General precautions
After draining the oil out of the pump, first clean up the pump. Lay clean paper, cloth or rubber sheet on
the workbench and place the pump on them. Disassembly and reassemble the pump with care using
necessary tools. Take proper measures against scratches, foreign matters and other troubles.
1) Disassembling
1. Dismounting the gear pump
Remove the two M8x25 hex bolts (68).
2. Removal of hex socket lock screw
Loosen the hex nut (61) completely and
remove the hex socket lock screw (60).
Tools: Wrench 13 mm, hex wrench 4 mm
Preferably record the stretch-out distance of this
hex socket lock screw, and it will facilitate pressure
adjustment after reassembly.
Supplement:
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