2009/06/29 New Hardware is Available for Certain Wheel Tractor-Scrapers Draft Frames {6204, 7000, 7960} Caterpillar

Wheel Tractor-Scraper:

657G (S/N: W1B1-UP; W1C1-UP; A4G1-UP)

ReferenceDisassembly and Assembly, RENR9714, "Draft Arm Assembly - Install"

ReferenceSpecial Instruction, REHS2623, "Assembly Procedure for 657G Wheel Tractor-Scrapers"

Description of Change: New bolts, washers, and nuts are available for the machines that are listed above. The new hardware will improve the bolted joint on the draft frame. The improved bolted joint will have lengthened service life and increased durability.

Adaptable To: The new 299-3423 Nut, 334-4466 Washer, and 6C-3213 Bolt are effective on the following machines.

• 657G (S/N: A4G1-100; W1B1-137; W1C1-282)

The new 299-3423 Nut, 334-4466 Washer, and 6C-3213 Bolt are already installed on the following machines.

• 657G (S/N: A4G101-UP; W1B138-UP; W1C283-UP)

Illustration 1	g01901004
(1) 299-3423 Nut (2) 334-4466 Washer (3) 6C-3213 Bolt

Refer to Table 1 for the amount of new bolts, nuts, and washers to use.

Table 1

Required Parts
Part Number	Description	Quantity
299-3423	Nut	72
334-4466	Washer	144
6C-3213	Bolt	72

Be sure to use the proper tightening sequence on the new bolts. Refer to Disassembly and Assembly, RENR9714, "Draft Arm Assembly - Install" or refer to Special Instruction, REHS2623, "Assembly Procedure for 657G Wheel Tractor-Scrapers".