PUMP AS 7C2798 - Caterpillar

Disassembly Procedure
Table 1
Required Tool
Tool Part Number Part Description Qty
A 1H-3107 Bearing Puller 1
0S-1619 Bolt 2
B 1P-0510 Driver Gp 1 Start By:
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Thoroughly clean the outside of the engine oil pump. Disassemble the engine oil pump in a clean area.
Illustration 1 g00550544
Remove cover (1) and cover (2) from the back of the engine oil pump.
Place the engine oil pump in an upright position. The gears should face upward.
Illustration 2 g00628384
Remove drive gear (3). This gear drives the fuel transfer pump.
Loosen bolt (4) from gear (5) until the washer is 3.20 mm (0.126 inch) from the gear.
Install Tooling (A). Tighten the screw in Tooling (A). Tap Tooling (A) over the shaft in order to loosen the gear from the shaft. Remove Tooling (A) and gear (5).
Illustration 3 g00550546
Remove cover (6). Note the location of the dowel in the cover. If necessary, remove the dowel.
Illustration 4 g00550614Note: The bearing in the Illustration has an internal groove. New bearings for the engine oil pump will not have an internal groove.
If necessary, use Tooling (B) in order to remove bearings (7) from cover (6). If necessary, remove the dowels from the opposite side of cover (6).
Illustration 5 g00550615
Remove drive shaft (8) from pump body (9).
Remove idler shaft (10) from pump body (9).
If necessary, remove the bearings from pump body (9).