2008/05/26 Caterpillar

Off-Highway Truck/Tractor:

797 (S/N: 5YW1-UP)

797B (S/N: JSM1-UP)

Service Magazine SEPD0931, 10 March 2008, "A New Tube And Clamps are Used for The Engine Oil Cooler's Water Outlet". The article has been revised in order to include information for installation of the tube.

Description of Change: A new tube and clamps have been added to the lower water lines group in the above models. The new clamps provide improved retention of the tube at the O-ring seal.

Adaptable To: The new tube and clamps have been added to the 153-6591 Water Lines Gp. The new tube and clamps can be adaptable back to first production.

Table 1 lists the former parts and new parts. Table 2 lists the additional parts in the 153-6591 Water Lines Gp.

Table 1

Former Part Number	New Part Number	Description	Quantity
252-4459	317-7050	Tube	1
5M-2894	Removed	Hard Washer	2
8N-3640	110-0096	Ring	1
8N-3639	108-6170	Clamp As	2

Table 2

Additional New Parts
Part Number	Description	Quantity
2A-4639	Bolt	2
3V-3308	Hard Washer	6
9S-8752	Full Nut	2
0S-1594	Bolt	2

Illustration 1	g01477873
Right side view (1) 108-6170 Clamp As (2) 110-0096 Ring (3) 3V-3308 Hard Washer (4) 2A-4639 Bolt (5) 317-7050 Tube (6) 9S-8752 Full Nut (7) 0S-1594 Bolt

Note: Connect the short leg of the 317-7050 Tube (5) to the bonnet for the engine oil cooler and connect the longer leg to the flange for the power train's cooler.This change is effective with the engine serial numbers that are listed in Table 3.

Table 3

Engine Serial Numbers

S/N:2CS01266-UP

S/N:3TN00764-UP