KIT-ENGINE OVERHAUL 4427439 - Caterpillar

Illustration 1 g03325358
Front view of engine
Table 1
Specification for 8N-7174 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     144-8263 Idler Gear As     After installation, bore of 140-9597 Bushing is
90.000 0.010 mm (3.5433 0.0004 inch).
Installation depth is
2.3 0.5 mm (0.09 0.02 inch).    
3     1     7C-3260 Shaft     Diameter is
89.880 0.020 mm (3.5386 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 is
8.75 0.10 mm (0.344 0.004 inch).
End play for the pump drive shaft assembly is
0.250 0.075 mm (0.0098 0.0030 inch).    
8     1     278-4287 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.