SWITCH AS PRESSURE 6T6651 - Caterpillar

Illustration 1 g00118286
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.
When the oil scavenge pump is viewed from the drive end, the drive rotates in the following direction. ... CounterclockwiseThe maximum axial play of the drive gear is 0.185 mm (0.0073 inch). (1) Length of new gears 8N-9164 Pump Group ... 84.000 0.015 mm (3.3071 0.0006 inch) 1W-8508 Pump Group ... 110.000 0.015 mm (4.3307 0.0006 inch) 144-8267 Pump Group ... 145.000 0.015 mm (5.7087 0.0006 inch)Depth of bores for new gears 8N-9164 Pump Group ... 84.150 0.020 mm (3.3130 0.0008 inch) 1W-8508 Pump Group ... 110.150 0.020 mm (4.3366 0.0008 inch) 144-8267 Pump Group ... 145.150 0.020 mm (5.7146 0.0008 inch) (2) Diameter of new gear shafts ... 31.742 0.008 mm (1.2497 0.0003 inch)Bore in bearings for new gear shafts after assembly ... 31.837 0.070 mm (1.2534 0.0028 inch) (3) Distance from the end of the shafts to the gear faces ... 34.0 0.5 mm (1.34 0.02 inch) (4) The bearings are installed in the pump body at the following depth: ... 1.5 0.5 mm (0.06 0.02 inch) (5) BoltNote: Before installing a gear onto the shaft, clean the shaft and clean the bore of the gear with isopropyl alcohol.
Tap on gear to seat the taper on the shaft.
Tighten the bolt to the following torque:Torque for bolt ... 100 20 N m (75 15 lb ft)Repeat this procedure until the torque does not change.
Illustration 2 g00118287
Typical example
Illustration 3 g00118288 (6) Position of bearing joints from the centerline through the bearing bores ... 45 15 degrees (7) The bearings are installed in the cover at the following depth: ... 1.5 0.5 mm (0.06 0.02 inch) (8) The dowels extend from the cover at the following distance: ... 6.4 0.5 mm (0.25 0.02 inch)