3406E Truck Engine Caterpillar


Engine Oil Pump

Usage:

3406E 5EK



Illustration 1g00285531

4N-0733 Engine Oil Pump Group

Without BrakeSaver


NOTICE

Before operation, the pump must be lubricated with clean engine oil and the pump must turn freely by hand or damage to parts can be the result.


Rotation from the drive end ... counterclockwise

Test on test stand with SAE 10W oil at 49°C (120°F)

Output ... 272 L (72 US gal)

Pressure ... 310 kPa (45 psi)

Pump rpm ... 2550 rpm

Output ... 144 L (38 US gal)

Pressure ... 560 kPa (81 psi)

Pump rpm ... 2550 rpm

(1) Diameter of drive shaft ... 22.217 ± 0.005 mm (0.8747 ± 0.0002 inch)

Bore in bearings for drive shaft ... 22.258 ± 0.008 mm (0.8763 ± 0.0003 inch)

Diameter of idler shaft ... 22.217 ± 0.005 mm (0.8747 ± 0.0002 inch)

Bore in bearings for idler shaft ... 22.258 ± 0.008 mm (0.8763 ± 0.0003 inch)

(2) Length of gears ... 79.375 ± 0.025 mm (3.1250 ± 0.0010 inch)

Depth of bores for gears ... 79.502 ± 0.020 mm (3.1300 ± 0.0008 inch)

(3) 2S-2760 Spring

Length under test force ... 117.9 mm (4.64 inch)
Test force ... 150 ± 8 N·m (110 ± 6 lb ft)
Free length after test ... 152.9 mm (6.02 inch)
Outside diameter ... 27 mm (1.063 inch)



Illustration 2g00285532

Pump Body




Illustration 3g00285533

Pump Cover

(4) Bearing joint ... 30 ± 15 degrees

(5) Position of bearing joint from the centerline through bearing bores ... 30 ± 15 degrees

(6) Face A

Install the bearings so the bearings are even with the outside of the pump body. The bearings are also even with "FACE A" of the pump cover.

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