2011/11/11 Caterpillar


New High-Temperature Fasteners Are Used with the Exhaust Lines on C175 Off-Highway Truck Engines {1061, 7553}

Usage:

795F AC ERM
Off-Highway Truck:
793F (S/N: SND1-UP; SSP1-UP)
795FSeries AC (S/N: ERM1-UP)
797F (S/N: LAJ1-UP)

Description of Change: The new high-temperature fasteners are more durable in the heat of the exhaust lines than the previously used fasteners.

Adaptable To: The new fasteners and the previous fasteners are identified in Table 1 and in Illustration 1.

Table 1
Item     New Fasteners     Previous Fasteners    
1     6V-7687 Locknut     6V-8149 Nut    
2     369-2483 High Temperature Bolt     8T-0372 Bolt
6V-5696 Bolt    

Rework Instructions

Table 2
Required Parts    
Part     Qty    
6V-8336 Bolts     8    
369-2483 High Temperature Bolts     8    
6V-7687 Locknuts     16    



Illustration 1g02771260

(1) 6V-7687 Locknuts

(2) 369-2483 High Temperature Bolts

  1. Remove the original 6V-8336 Bolts and 6V-8149 Nuts from the tops of the exhaust manifolds. Keep the washers for reuse. Discard the original bolts and nuts.

  1. Install new 6V-8336 Bolts along with the original washers and install the new 6V-7687 Locknuts (1) .

  1. Remove all of the 8T-0372 Bolts, 6V-5696 Bolts, and 6V-8149 Nuts from the feet of the exhaust manifolds. Keep the washers for reuse. Discard the original bolts and nuts.

  1. Install eight new 369-2483 High Temperature Bolts (2) and the new 6V-7687 Locknuts (1) along with the original washers.

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