FITTING 3B8999 - Caterpillar

Illustration 1 g03058156
Front view of engine
Table 1
Specification for 278-1348 Front Gear Gp
Item Qty Part Specification Description
1 1 7N-5245 Pump Adapter After installation, bore of 127-5400 Bushing is 75.000 0.055 mm (2.9528 0.0022 inch).
2 1 155-2307 Idler Gear As After installation, bore of 116-1365 Bearing is 105.970 0.010 mm (4.1724 0.0004 inch).
Installation depth is 2.3 0.5 mm (0.09 0.02 inch).
3 1 151-0149 Idler Shaft Diameter is 105.880 0.020 mm (4.1685 0.0008 inch).
4 2 259-4598 O-Ring Seal Before assembly, lightly lubricate the bores with the lubricant that is being sealed.
5 1 7N-5239 Pump Drive Shaft As Diameter is 74.900 0.015 mm (2.9488 0.0006 inch).
Install the 8T-2153 Socket Setscrew to the bottom of the threaded hole and tighten to 6 1 N m (53 9 lb in).
6 1 235-3546 O-Ring Seal Before assembly, lightly lubricate the bores with the lubricant that is being sealed.
7 2 7N-5246 Thrust Washer Thickness is 8.50 0.05 mm (0.335 0.002 inch).
Width of groove in new pump drive shaft assembly (8) is 8.75 0.10 mm (0.344 0.004 inch).
End play for the pump drive shaft assembly is 0.175 to 0.325 mm (0.0069 to 0.0128 inch).
9 1 279-3342 Pump Adapter After installation, bore of 127-5400 Bushing is 75.000 0.055 mm (2.9528 0.0022 inch).
During assembly, flush the bushing with the pump adapter surface.
Oil hole in the bushing must be aligned with the hole in the bore.