ENGINE AR 4W3797 - Caterpillar

Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2321 Combination Puller 1
B 1P-0510 Driver Group 1 Start By:
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01001918
Remove the bolt that holds drive gear (1) to the shaft of engine oil pump (2).
Use Tooling (A) to remove drive gear (1) from the shaft. Remove the key from the shaft.
Illustration 2 g01043546
Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Remove bolts (6) that hold retainer (9) to pump body (3).
Remove retainer (9), spring (8), and relief plunger (7) from the pump body.
Remove bolts (12) and cover (10) from the pump body. Note: Inspect the bores in the cover. The aluminum cover does not have bearings. If the bores in the cover are damaged, replace the cover with a new part.
Remove idler gear (5) and drive gear (4) from the pump body.
Use Tooling (B) to remove sleeve bearings (11) from pump body (3).