DRIVE AS-FAN 3240123 - Caterpillar

Off-Highway Truck: 793D (S/N: FDB1-UP) 793C XQ (S/N: CBR1-UP) 793C (S/N: ATY1-UP) 793C (S/N: 4GZ1-UP) 793C (S/N: 4AR1-UP) 793B (S/N: 1HL1-UP) 793 (S/N: 4SJ1-UP)Introduction
This Special Instruction provides the information that is necessary to rework the 232-1691 Differential Housing and the 232-1689 Differential Housing for the installation of the new thrust washer.Do not perform any procedure that is outlined in this publication or do not order parts until you understand the information that is contained in this document.Required Parts
Table 1
Required Parts    
Item     Part Number     Description     Qty    
1     309-7671     Thrust Washer     2    
Start by removing the differential and bevel gear.ReferenceSee Disassembly and Assembly, "Differential and Bevel Gear - Remove" for more information.
Disassemble the differential and bevel gear.ReferenceSee Disassembly and Assembly, "Differential and Bevel Gear - Disassemle" for more information.Rework Procedure
Illustration 1 g01306901
232-1691 Differential Housing (1) Datum 01
Illustration 2 g01306907
275-7897 Differential Housing (2) 45 degree chamfer with a depth of 1.5 0.25 mm (0.0591 0.0098 inch) (3) Radius 0.5 0.25 mm (0.0197 0.0098 inch) (A) The diameter 170 mm (6.6929 inch) intersects the radius of the slot. (B) 120 degrees (C) 137.5 mm (5.4134 inch) from (1) Datum 01 to bottom of slot (D) Distance of 127 mm (5.0000 inch) from Datum 01 (1) to top of slot
Use a 21 mm (0.83 inch) end cutter with a 0.5 0.25 mm (0.0197 0.0098 inch) radius (3) in order to machine the slots to depth (C) 137.5 mm (5.4134 inch) from Datum 01 (1). A 1.5 0.25 mm (0.0591 0.0098 inch), 45 degree chamfer (2) between the counterbore face and the slot wall