700 Series Articulated Trucks, Differential and Bevel Gear, Service Part Inventory May Have Dowels Installed Incorrectly [TIBU4613]

POWER TRAIN

DIFFERENTIAL & BEVEL GEAR GP

700 Series Articulated Trucks, Differential and Bevel Gear, Service Part Inventory May Have Dowels Installed Incorrectly

CONFIDENTIAL TIBU4613-00

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TECHNICAL INFORMATION BULLETIN	August 15, 2005
Articulated Trucks	725 (AFX1-Up, B1L1-Up), 730 (AGF1-Up, B1M1-Up), 730 EJECTOR (B1W1-Up), 735 (AWR1-Up, B1N1-Up), 740 (AXM1-Up, B1P1-Up) and 740 EJECTOR (AZZ1-Up, B1P1-Up)
	Component Code(s) 3256, 3258

SUBJECT: 700 Series Articulated Trucks, Differential and Bevel Gear, Service Part Inventory May Have Dowels Installed Incorrectly

PROBLEM:

The dowels in some new differential locking hubs may be installed incorrectly. The positioning of the dowels relative to the back face of the hub is critical.

SOLUTION:

The distance from the back face to the dowel needs to be checked on all new hub assemblies. Refer to Table 1 for part numbers of the effected hub assemblies.

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Effected Hub Assemblies
Machine	Front Axle Differential	Rear Axle Differential	Center Axle Differential
725 (AFX1-Up, B1L1-Up)	151-8268 Hub part of 147-6790 Differential and Bevel Gear		151-8268 Hub part of 188-1406 Differential and Bevel Gear
730 (AGF1-Up, B1M1-Up) 730 EJECTOR (B1W1-Up)	151-8269 Hub part of 147-7380 Differential and Bevel Gear		151-8269 Hub part of 188-1408 Differential and Bevel Gear
735 (AWR1-Up, B1N1-Up)	151-8279 Hub part of 148-7200 Differential and Bevel Gear	151-8269 Hub part of 152-4390 Differential and Bevel Gear	151-8269 Hub part of 175-0336 Differential and Bevel Gear
740 (AXM1-Up, B1P1-Up) 740 EJECTOR (AZZ1-Up, B1P1-Up)	151-8279 Hub part of 148-7200 Differential and Bevel Gear		151-8279 Hub part of 154-0300 Differential and Bevel Gear

Table 1

Check the position of the dowels relative to the back face of the hub on all new hub assemblies. The dowels should be recessed 1 +/- 0.25 mm (X) from the back face of the hub. Refer to Figure 1 and Figure 2.

Figure 1

Figure 2 Detail A

If a new hub has dowels that are recessed more that 1.25 mm. The dowels will need to be pressed into the hub till they are 1 +/- 0.25 mm (X) from the back face of the hub. If the dowels do not have the proper hub engagement, they could "walk" out.