RING-PISTON 9N0578 - Caterpillar

Illustration 1 g03590215
Table 1
Specification for the 273-1698 Engine Oil Pump Gp
Item Qty Part Specification Description
1 2 7N-5052 Gear Length of the new gear is 84.000 0.015 mm (3.3071 0.0006 inch).
Depth of the bore in the oil pump body for the new gear is 84.150 0.020 mm (3.3130 0.0008 inch).
2 2 7W-0059 Pump Shaft Assembly Diameter of the 7W-1017 Shaft is 31.742 0.008 mm (1.2497 0.0003 inch).
Distance (B) from the end of the shaft to the gear face is 34.0 0.5 mm (1.34 0.02 inch).
Bore in the bushing for idler shaft assembly is 31.811 0.013 mm (1.2524 0.0005 inch).
3 1 107-7175 Spring Length under test force is 107.16 mm (4.219 inch).
Test force is 555.6 20.0 N (124.9 4.5 lb).
Free length after test is 144.5 mm (5.69 inch).
4 1 2W-5479 Pump Shaft Assembly Diameter of the new 2W-5480 Shaft is 31.742 0.008 mm (1.2497 0.0003 inch).
Bore in the bushing for oil pump drive shaft assembly is 31.811 0.013 mm (1.2524 0.0005 inch).
Distance (C) from the end of the shaft to the gear face is 47.0 0.5 mm (1.85 0.02 inch).
5 6 7W-0060 Bushing Installation depth is 1.5 0.5 mm (0.06 0.02 inch).
Position of bushing joints from the centerline through the bearing bores is 45 15 degrees.
F 2 4M-3248 Hollow Dowel Extension of the hollow dowel from the oil pump cover is 6.0 0.5 mm (0.24 0.02 inch).
G 2 7N-2043 Dowel Extension of the dowel from the oil pump cover is 6.0 1.0 mm (0.24 0.04 inch).
The rotation of the drive gear is clockwise when you view the engine oil pump from the drive end.
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.
- - - Bench test specifications:
Unrestricted flow rate at 700 rpm is 410 L (108 US gal).
Pump pressure at 300 rpm with fully blocked outlet is 520 to 580 kPa (75 to 84 psi).