G3520C and G3520E Engines Caterpillar


Engine Oil Pump

Usage:

G3520C B9P



Illustration 1g01349694

(1) 107-7175 Spring

Length under test force ... 107.16 mm (4.219 inch)
Test force ... 555.6 ± 20.0 N (124.9 ± 4.5 lb)
Free length after test ... 144.5 mm (5.69 inch)
Outside diameter ... 27.00 mm (1.063 inch)



Illustration 2g01418999

(A) Dimension for the gear

Length of the new gear ... 110.000 ± 0.015 mm (4.3307 ± 0.0006 inch)
Depth of the bore in oil pump body for the new gear ... 110.15 ± 0.02 mm (4.337 ± 0.001 inch)

(B) Dimension for the shaft

Diameter of the new shaft ... 31.742 ± 0.008 mm (1.2497 ± 0.0003 inch)
Bore in bearing for the shaft after assembly ... 31.811 ± 0.013 mm (1.2524 ± 0.0005 inch)

(C) Protrusion of the dowel from the pump cover ... 6.0 ± 0.5 mm (0.24 ± 0.02 inch)

(D) Distance from the end of the idler shaft to gear face ... 34.0 ± 0.5 mm (1.34 ± 0.02 inch)

(E) Distance from the end of the shaft to gear face ... 47.0 ± 0.5 mm (1.85 ± 0.02 inch)

(F) The sleeve bearing is installed in the pump cover at the following depth. ... 1.5 ± 0.5 mm (0.06 ± 0.02 inch)

(G) The sleeve bearing is installed in the oil pump body at the following depth. ... 1.5 ± 0.5 mm (0.06 ± 0.02 inch)




Illustration 3g01419001



Illustration 4g01430632

(H) Position of bearing joint from the centerline through the bearing bore ... 45 ± 15 degrees

When the engine oil pump is viewed from the drive end the drive gear rotates in the following direction. ... Clockwise

Bench test specifications

Unrestricted flow rate per minute at 1000 rpm ... 410 L (108 US gal)
Pump pressure at 300 rpm with fully blocked outlet ... 590 to 670 kPa (86 to 98 psi)

Note: Before you install the pump, lubricate the moving parts with clean engine oil. Rotate the pump by hand in order to ensure that the pump rotates freely.

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