Hydraulic Pump Removal & Disassembly; Pump Disassembly - Allied Systems W8L Service Manual

Repairs - Hydraulic Pump Removal & Disassembly
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Hydraulic Pump Removal & Disassembly
To remove the hydraulic pump the winch must be removed
from the tractor and the input carrier must be removed.
Cleanliness is extremely important when repairing these
pumps. Work in a clean area.
1. Loosen suction hose at suction manifold. Remove
steel tube from valve to RH side of brake housing.
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Figure 4-10 Hydraulic Pump
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2. Loosen pressure hose from pump check valve.
Remove the two capscrews securing the pump, then
remove the pump. See Figure 4-10 for an exploded
view of the pump.

Pump Disassembly

1. Clean the pump thoroughly with solvent, kerosene,
or other non-corrosive cleaning fl uid which will not
affect rubber components.
2. Clamp pump in vise, shaft down.
3. Scribe a line across the three sections of the pump
to act as a guide in reassembly.
4. Remove capscrews.
5. Remove from vise. Hold pump in hands and bump
shaft against wooden block to separate front plate
(16) from backplate (2). Body (4) will remain with
either front plate or backplate.
6. To separate body from section that remains, place
drive gear (6) in bearing and tap protruding end with
plastic hammer.
1. Capscrew
2. Backplate Assembly
3. O-Ring
4. Body
5. Dowel Pin
6. Drive Gear Assembly
7. Idler Gear Assembly
8. Key
9. Seal Package
10 . ..Diaphragm
11 . ..Back-up gasket
12 ..Protector gasket
13 . ..Diaphragm Seal
14 . Spring
15 . Ball
16 . Front Plate Assembly
17 . Shaft Seal