C280-08 Tier 4 Engine Caterpillar

Assembly Procedure

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Illustration 1	g03841320

1. Use Tooling (A) in order to install lip seals (9) in housing (6). Install the inside lip seal with the lip toward the inside. Install the outside lip seal with the lip toward the outside. Apply clean engine oil to the lips of the lip seals.
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   Illustration 2	g03840590

2. Apply clean engine oil to rotor (8). Install rotor (8) into the housing.
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   Illustration 3	g03840587

3. Apply clean engine oil to idler (7). Install idler (7) into the rotor.
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   Illustration 4	g03841351

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   Illustration 5	g03841465

4. Install new gaskets and the shims that were removed during disassembly.

5. Place idler (7) in position so that the shaft in head (5) will engage the idler. Align the marks on the head and housing (6). Install head assembly (5) and bolts (4).

6. Check the end clearance of the prelubrication oil pump. Measure the clearance between the back of the rotor and the machined surface at the housing base. Insert a feeler gauge through the port opening. The end clearance must be 0.013 to 0.076 mm (0.0005 to 0.0030 inch). If necessary, remove the head. Add or remove the shims in order to get the correct end clearance.
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   Illustration 6	g03840298

7. Align the marks on motor (2) and pump assembly (3). Engage the key on the motor shaft with the keyway in the pump.

8. Position the two units together. Install bolts (1).

End By:

1. Install the prelubrication oil pump.