994D Wheel Loader Machine System Caterpillar

Removal Procedure

Start By:

1. Install the wheel chocks. Refer to Disassembly and Assembly, "Wheel Chock (Front and Rear) - Remove and Install".
2. Connect the frame lock link. Refer to Disassembly and Assembly, "Frame Lock Link - Separate and Connect".
3. Purge the air system pressure. Refer to Disassembly and Assembly, "Air System Pressure - Purge/Charge".

Note: Install caps and plugs on all openings in order to prevent dirt or debris from entering the system. Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

Note: For easier assembly, mark all hose assemblies, tube assemblies, wire harnesses and cables for identification purposes.

1. Turn the battery disconnect switch to the OFF position. Open the door assembly to the lubrication pump on the left side of the platform.

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Illustration 1	g00591770

2. Disconnect wiring harness (1) to the solenoid valve at the electrical connection.

3. Disconnect wiring harness (2) to the pressure sensor at the electrical connection.

4. Disconnect wiring harness (3) to the level switch at the electrical connection.

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Illustration 2	g00591771

5. Remove two clips (4) and (5) from tube assembly (6). Remove tube assembly (6) from the check valve. Disconnect hose assembly (7) from the union bulkhead.

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Illustration 3	g00591772

6. Disconnect swivel tee (8) from the elbow on the vent valve. Remove bolt (9), the washer, and angle (10) from the lubrication pump. Remove bolt (11), the washer, and the clip from the lubrication pump.

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Illustration 4	g00591773

7. Disconnect hose assembly (12) from solenoid valve (13). Remove bolt (14), the washer, and the clip from the lubrication pump.

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Illustration 5	g00591787

8. Attach a suitable lifting device to lubrication pump (15). Attach the suitable lifting device to a hoist.

9. Remove 15 bolts (16) and the washers that secure lubrication pump (15) to the platform.

10. Remove lubrication pump (15) from the platform. The weight of the lubrication pump is 29 kg (64 lb).

Installation Procedure

Note: Verify that all of the components of the lubrication pump are clean and free of foreign material prior to installation.

Note: Check all of the O-ring seals and the components for wear or damage. Replace the components, if necessary. Lubricate the O-ring seals lightly with the lubricant that is being sealed.

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Illustration 6	g00591787

1. Attach a suitable lifting device to lubrication pump (15). Attach the suitable lifting device to a hoist. The weight of the lubrication pump is 29 kg (64 lb).

2. Position lubrication pump (15) to the platform.

3. Install 15 bolts (16) and the washers that secure lubrication pump (15) to the platform.

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Illustration 7	g00591773

4. Connect hose assembly (12) to solenoid valve (13). Install bolt (14), the washer, and the clip to the lubrication pump.

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Illustration 8	g00591772

5. Install bolt (11), the washer, and the clip to the lubrication pump. Install bolt (9), the washer, and angle (10) to the lubrication pump. Connect swivel tee (8) to the elbow on the vent valve.

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Illustration 9	g00591771

6. Connect hose assembly (7) to the union bulkhead. Install tube assembly (6) to the check valve. Install two clips (4) and (5) to tube assembly (6) .

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Illustration 10	g00591770

7. Connect wiring harness (3) from the level switch at the electrical connection.

8. Connect wiring harness (2) from the pressure sensor at the electrical connection.

9. Disconnect wiring harness (1) from the solenoid valve at the electrical connection.

10. Close the door assembly to the lubrication pump.

End By:

1. Charge the air system pressure. Refer to Disassembly and Assembly, "Air System Pressure - Purge/Charge".
2. Separate the frame lock link. Refer to Disassembly and Assembly, "Frame Lock Link - Separate and Connect".
3. Remove the wheel chocks. Refer to Disassembly and Assembly, "Wheel Chock (Front and Rear) - Remove and Install".