2008/09/22 Caterpillar

Off-Highway Truck/Tractor:

793D (S/N: FDB1-UP; 8WM1-UP)

Description of Change: A new bracket assembly has been added to the water lines group for the aftercooler in the above models. The new bracket assembly allows added clamps to provide improved retention of the tube at the O-ring seal.

Adaptable To: The new parts can be used on prior serial numbers. Table 1 lists the former parts and new parts that are required for the serial number 8WM1731-UP.

Table 1

Description	Former Part Number	New Part Number	Qty
Bracket Assembly	304-5781	326-7311	1
Clip	-	317-2845	2
Clamp Assembly	-	124-6333	2
Bolt	-	0S-1591	2
Bolt	-	2A-4639	2
Hard Washer	-	3V-3308	6
Hard Washer	-	5M-2894	2

The 326-7311 Bracket As can be made from the 304-5781 Bracket As by drilling two holes that are 10.5 mm (0.4 inch) in diameter. Refer to Illustration 1 for the drilling locations.

Illustration 1	g01621647
(1) Bolt hole on 326-7311 Bracket As that is used as the zero plane (2) Two added holes that are 10.5 mm (0.4 inch) in diameter.

Illustration 2	g01621651
(5) 326-7311 Bracket As (6) 317-2845 Clip (7) 124-6333 Clamp As (8) 0S-1591 Bolt (9) 2A-4639 Bolt (10) 3V-3308 Hard Washer (11) 5M-2894 Hard Washer

Table 2 lists the former parts and additional new parts that are required for the serial numbers 8WM00804-01730.

Table 2

Description	Former Part Number	New Part Number	Qty
Bracket	267-4445	316-1959	1
Tube	257-6361	314-6175	1
Bolt	-	0S-1594	2
Bolt	-	0S-1619	2
Retaining Ring	1W-4099	7E-7209	1
Full Nut	-	9S-8752	6
Clamp assembly	1w-4072	124-6333	4
Clip	-	317-2845	2
Bolt	-	0S-1591	2
Bolt	-	2A-4639	2
Hard Washer	-	3V-3308	10
Hard Washer	-	5M-2894	2

The 316-1959 Bracket can be made from the 267-4445 Bracket by drilling two holes that are 10.5 mm (0.4 inch) in diameter. Refer to Illustration 3 for the drilling locations.

Illustration 3	g01625861
(3) Bolt hole on 316-1959 Bracket that is used as the zero plane (4) Two added holes that are 10.5 mm (0.4 inch) in diameter.

Illustration 4	g01634780
(6) 317-2845 Clip (7) 124-6333 Clamp As (8) 0S-1591 Bolt (9) 2A-4639 Bolt (10) 3V-3308 Hard Washer (11) 5M-2894 Hard Washer (12) 316-1959 Bracket (13) 124-6333 Clamp As (14) 9S-8752 Full Nut (15) 0S-1594 Bolt (16) 0S-1619 Bolt (17) 314-6175 Tube (18) 7E-7209 Retaining Ring

Table 3

Effective Serial Numbers

S/N:8WM01980-UP