700 Series Articulated Trucks, Disc Stack-Up Change in the Differential and Bevel Gear Gps, SIS Information has Changed [TIBU4622]

POWER TRAIN

DIFFERENTIAL & BEVEL GEAR GP

700 Series Articulated Trucks, Disc Stack-Up Change in the Differential and Bevel Gear Gps, SIS Information has Changed

CONFIDENTIAL TIBU4622-00

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TECHNICAL INFORMATION BULLETIN	September 9, 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, 3054

SUBJECT: 700 Series Articulated Trucks, Disc Stack-Up Change in the Differential and Bevel Gear Gps, SIS Information has Changed

PROBLEM:

A change has been made to the quantity of discs used in the cross axle differential lock. The new disc stack-up will reduce the load on the reaction pins on the differential lock hub. The reduced load on the pins will stop the pins from loosening in the hub. SIS shows the new arrangement, which is different from machines in the field.

Refer to Table 1 for the differential and bevel gears groups that are affected.

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Table 1 Effected Differential and Bevel Gears Groups
	Front Axle	Center Axle	Rear Axle
725	147-6790	188-1406	147-6790
730 & 730 Ejector	147-7380	188-1408	147-7380
735	148-7200	152-4390	175-0336
740 & 740 EJECTOR	148-7200	154-0300	148-7200

The arrangement of the cross axle clutch inside the differential and bevel gears groups is shown in Figure 1 and Table 2.

Figure 1 The cross axle clutch configuration on machines

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Table 2 Distribution of Parts in the Differential and Bevel Gears Groups
	Plate (1)		Disc - Friction (2)		Plate ? Clutch or Plate (Clutch) (3)
Model	Part Number	Qty	Part Number	Qty	Part Number	Qty
725	151-8274	7	136-6324	7	151-8275	1
730 & 730 EJECTOR	151-8274	8	136-6324	8	151-8275	1
735 (Center & Rear)
735 (Front)	151-8282	6	136-6325	6	151-8281	1
740 & 740 EJECTOR

* Note that the part description for Item 3 may be different depending on the differential and bevel gear group being viewed in SIS.

SOLUTION:

When servicing a differential gear group, remove one plate (Item 1) and one friction disc (Item 2) from the side of the clutch that will be nearest the actuation piston (Item 4). Install a second 151-8275 or 151-8281 plate (Item 3) in place of the friction disc and plate.

Refer to Figure 2 and Table 3 for the distribution of plates, friction plates and clutch plates. (This is the configuration that is shown in SIS.)

Figure 2 The cross axle clutch configuration for dowel loosening fix (As shown in SIS)

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Table 3 Distribution of Parts in the Differential and Bevel Gears Groups
	Plate (1)		Disc - Friction (2)		Plate ? Clutch or Plate (Clutch) (3)
Model	Part Number	Qty	Part Number	Qty	Part Number	Qty
725	151-8274	6	136-6324	6	151-8275	2
730 & 730 EJECTOR	151-8274	7	136-6324	7	151-8275	2
735 (Center & Rear)
735 (Front)	151-8282	5	136-6325	5	151-8281	2
740 & 740 EJECTOR