12H Motor Grader Engine Supplement Caterpillar

Removal Procedure

Start By:

1. Remove the air compressor. Refer to Disassembly and Assembly, "Air Compressor - Remove and Install".

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.

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Illustration 1	g01020153

1. Disconnect tube assembly (1) .

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Illustration 2	g01020159

2. Disconnect tube assembly (2) .

3. Disconnect harness assembly (3) .

4. Disconnect tube assembly (4) .

5. Remove bolts (5) .

6. Remove unit injector hydraulic pump (6) .

Installation Procedure

Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.

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Illustration 3	g01020159

1. Install unit injector hydraulic pump (6) .

2. Install bolts (5) .

3. Connect tube assembly (4) .

4. Connect harness assembly (3) .

5. Connect tube assembly (2) .

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Illustration 4	g01020153

6. Connect tube assembly (1) .

End By: Install the air compressor. Refer to Disassembly and Assembly, "Air Compressor - Remove and Install".