G3520B Engines Caterpillar


Gear Group (Front)

Usage:

G3520B GLF



Illustration 1g01449473

(1) Accessory drive gear

(2) Idler gear assembly

(7) Crankshaft gear

Note: Install the socket setscrew to the bottom of the threaded hole.

(3) Torque for the socket setscrew ... 6 ± 1 N·m (55 ± 9 lb in)

(4) Dimensions for pump drive shaft assembly

Diameter of new pump drive shaft ... 74.900 ± 0.015 mm (2.9488 ± 0.0006 inch)
Bore in sleeve bearing after assembly ... 75.000 ± 0.055 mm (2.9527 ± 0.0022 inch)

Note: Align the oil hole in the bearing with the oil hole in the adapter.

(5) Lubricate the bore of the four O-ring seals lightly with the lubricant that is being sealed.

(6) Dimensions for thrust washer

Thickness of new thrust washer ... 8.50 ± 0.05 mm (0.335 ± 0.002 inch)
Width of groove in pump drive shaft ... 8.750 ± 0.025 mm (0.3445 ± 0.0010 inch)
End play for pump drive shaft ... 0.175 to 0.325 mm (0.0069 to 0.0128 inch)

(8) Dimensions for shaft

Diameter of new shaft ... 105.88 ± 0.02 mm (4.168 ± 0.001 inch)
Installation depth of bearing in the idler gear ... 2.3 ± 0.5 mm (0.09 ± 0.02 inch)
Bore in bearing after assembly ... 105.970 ± 0.010 mm (4.1720 ± 0.0004 inch)

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