C4.4 Industrial Engine Engine Oil Pump - Inspect Caterpillar

If any part of the oil pump is worn enough in order to affect the performance of the oil pump, the oil pump must be replaced.

Perform the following procedures in order to inspect the oil pump. Refer to Specifications, "Engine Oil Pump" for clearances and torques.

Show/hide table

Illustration 1	g00938064
Typical example

1. Remove the oil pump from the engine. Remove the cover of the oil pump.

2. Remove the outer rotor (1). Clean all of the parts. Look for cracks in the metal or other damage.

3. Install the outer rotor. Measure the clearance of the outer rotor to the body .
   Show/hide table

   Illustration 2	g00938061
   Typical example

4. Measure the clearance of the inner rotor to the outer rotor (2).
   Show/hide table

   Illustration 3	g00938799
   End play measurement of the rotor

5. Measure the end play of the outer rotor with a straight edge and a feeler gauge (3).

6. Clean the top face of the oil pump and the bottom face of the cover. Install the cover on the oil pump. Install the oil pump on the engine.