TIP GP 3876856 - Caterpillar

If the front housing is not installed, do not turn the crankshaft. Damage to the engine may occur.
Illustration 1 g00458938
Idler gear and components of the engine oil pump
Type ... Gerotor pump (1) C-clip (2) Collar (3) Spring (4) Shim (5) Oil pump cover (6) Inner rotor Number of lobes ... 4 (7) Spring (8) Outer rotor Number of lobes ... 5
Illustration 2 g00459701 (A) Clearance between the inner rotor and the outer rotor is the following value. ... 0.01 to 0.15 mm (0.0004 to 0.006 inch)Service Limit ... 0.25 mm (0.010 inch) (9) Bushing (10) Idler gear (11) Thrust washer
Illustration 3 g03131156
Typical example
(12) Dial indicator (B) When the components of the oil pump are installed on the front housing, measurement (B) between C-clip (1) and collar (2) must not exceed the following distance. ... 0.10 to 0.15 mm (0.004 to 0.006 inch)Service limit ... 0.20 mm (0.008 inch)The distance between the faces is adjusted with shims (4). The following sizes of shims are available:
0.10 mm
0.15 mm
0.20 mm
0.50 mm