2011/07/26 Caterpillar

Wheel Tractor-Scraper:

631G (S/N: DFA1-UP; DXE1-UP; M1W1-UP)

637G (S/N: DFJ1-UP)

ReferenceRefer to Special Instruction, REHS7148, "Installation Guide for New Side Doors and Improved Latches on Certain G Series Wheel Tractor-Scrapers".

Description of Change: The new latch assembly and new access door assembly will latch the hood better than the former latches. The new latch assembly and new access door assembly will better withstand the vibration during push/pull operation. This improvement will have more service life.

Adaptable To:

Illustration 1	g02621596
Hood group (1) New access door assembly (2) New access door assembly (3) New latch assembly

Table 1

Required Parts
Item	Qty	Part Number	Part Name
1	1	368-4888	Access Door As
2	1	368-4882	Access Door As
3	2	326-0610	Latch As

The new latch assembly (3) and new access door assemblies (1) and (2) are adaptable to the machines (S/N: M1W1-124; DFA1-440; DXE1-126; DFJ1-471).

The new latch assembly (3) and new access door assemblies (1) and (2) are effective in production with the machines (S/N: M1W125-UP; DFA441-UP; DXE127-UP; DFJ472-UP).

Refer to the above reference for detailed procedure to update the access door assembly.