2009/08/17 A New Baffle, A New Bracket, and New Seals Are Now Available On Certain Wheel Tractor-Scrapers {1353, 7251} Caterpillar

Wheel Tractor-Scraper:

631G (S/N: DFA1-UP)

637G (S/N: DFJ1-UP)

ReferenceSpecial Instruction, REHS4241, "Rework Procedure To Update the Radiator Group"

Description of Change: A new baffle, a new bracket, and new seals are now used on certain Wheel Tractor-Scrapers. The new baffle, a new bracket, and new seals will prevent rocks from being directed or entering the area of the fan on the machine. This change will prevent leaks that are caused by small rocks that are deflected off the fan into the radiator core.

Adaptable To: The new bracket and new seals are adaptable to the following machines in Group 1:

• 637G (S/N: DFJ394-408)

The new bracket and new seals are effective with the following machines in Group 1:

• 637G (S/N: DFJ409-UP)

Table 1

Required Parts for Group 1
Qty	New Part	Description
3	223-8985	Radiator Core As (1)
6	272-5438	Radiator Seal (1)
80 cm (31.496 inch)	333-9632	Seal
1	5P-6126	Seal
8	8T-4195	Bolt
1	332-3618	Bracket

( 1 )

This is an optional part.

The new baffle, the bracket, and seals are adaptable to the following machines in Group 2:

• 631G (S/N: DFA125-364)

• 637G (S/N: DFJ225-393)

The new baffle, the bracket, and new seals are effective with the following machines in Group 2:

• 631G (S/N: DFA365-UP)

Table 2

Required Parts for Group 2
Qty	New Part	Description
1	332-7600	Baffle
10	139-3785	Pop Rivet
3	223-8985	Radiator Core As (1)
6	272-5438	Radiator Seal (1)
80 cm (31.496 inch)	333-9632	Seal
1	5P-6126	Seal
8	8T-4195	Bolt
1	332-3618	Bracket

( 1 )

This is an optional part.

ReferenceFor specific instructions, refer to the following service information. Special Instruction, REHS4241, "Rework Procedure To Update the Radiator Group"