The Procedure to Improve the HAA ATAAC System on the 797F Off-Highway Truck is Updated {1063, 1071} Caterpillar

The Procedure to Improve the HAA ATAAC System on the 797F Off-Highway Truck is Updated {1063, 1071}

Usage:

797F LAJ

Off-Highway Truck/Tractor: 797F (S/N: LAJ195-196,229-229,231-231,353-353,355-355,357-357,359-359,361-361,363-364,366-366,376-377,379-379,386-386,388-388,392-392,395-395,398-398,478-478,537-537,539-539,544-553,566-568,572-572,585-595,597-598)

Description Of Change: The High Altitude Arrangement (HAA) Air to Air After Cooled (ATAAC) system has been improved on the machines listed above. The improved ATAAC system has been updated with new split bellows, bellow brackets, tubes, and inlet bellows. The redesigned ATAAC system improves support and adjustability of the system.

Adaptable To:

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Illustration 1	g06089131
View of the new ATAAC system

Improved ATAAC system is adaptable to the machines within the listed serial numbers, and is effective with all the machines after the listed serial numbers.

Refer to Table 1 for the list of parts required to improve the ATAAC system.

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Table 1
Required Parts List
Qty	Part Number	Description
2	342-1323	V Band Clamp
2	465-8082	Bellows
8	8T-4195	Bolt
8	198-4777	Hard Washer
8	8T-4184	Bolt
15	8T-4136	Bolt
1	494-0134	Tube As
1	494-0133	Tube As
2	239-6807	Clamp As
1	223-5665	Bellows
16	8T-4183	Bolt
8	8T-4956	Bolt
2	470-1585	Tool-Align
10	329-3555	Half Clip
24	5P-1076	Hard Washer
8	6V-7687	Locknut
4	386-3198	U-Bolt
4	4W-1211	Strip
2	494-0135	Plate
2	494-0136	Plate
4	9N-1941	V Band Clamp
1	513-0256	Tool-Align
12	329-3356	Nut
6	8N-4401	V Band Clamp
2	470-1594	Bellows As
1	470-1502	Plate As
40	198-4778	Hard Washer
2	470-1645	Clamp As
4	470-1648	Bracket
1	508-9524	Bracket As
1	508-9526	Bracket As
12	8T-4194	Bolt
1	333-7683	Bracket As
1	333-7677	Bracket As
4	283-4987	Reducer Hose
8	256-4448	T Bolt Clamp
8	216-2212	Clamp
2	344-0079	Bellows As
4	434-6544	V Band Clamp
15	8T-4121	Hard Washer

For the complete procedure, parts, and tools required to improve the ATAAC system, refer to the most recent version of Special Instruction, REHS9331, "Procedure to Improve the HAA ATAAC system on the 797F Off-Highway Truck".

The special instruction can be found on Caterpillar Service Information System (SIS) and through the normal literature system.