IV-34
HYDRAULIC UNITSGEAR PUMP
DISASSEMBLY AND ASSEMBLY
General Cautions
• Carry out disassembly and assembly operations
in a clean place and provide clean containers to
place the disassembled parts in.
• Before disassembly, clean around the ports and
remove the paint from each joint using a wire
brush.
• Clean each of the disassembled parts with a clean
-
ing oil such as diesel fuel.
• Make match marks on each part so that they will
be assembled in the same positions when as-
sembled.
• Replace all seals with new ones each time the
pump is disassembled, coating them lightly with
grease.
• Check each part to make sure there is no abnormal
wear or seizing and use sandpaper, etc. to remove
any burrs, sharp edges, etc.
• Adjust adjustment screws only when required.
Following is an explanation of the gear pump disas-
sembly procedure.
Follow the procedure used to disassemble the gear
pump in reverse order when reassembling it.
1. Remove the cap screws.
Screw: 88~93 N·m
2. Remove the flange.
3. Remove gasket (2) from flange (1).
4. Remove snap ring (3) and oil seal (4) from flange
(1).
• Be careful not to scratch or otherwise damage
the flange.
• When re-assembling, install the oil seal using
the jigs A and B.
T7D151
2
1
4
3
T7D152
B
A
4
1
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