2014/11/18 Caterpillar


Improved Air Lines Group Is Now Used on Certain 795F AC Off-Highway Trucks {1071}

Usage:

795F AC ERM
Off-Highway Truck:
795F AC (S/N: ERM1-UP)
795F XQ (S/N: SNT1-UP)

Description of Change: An Improved air lines group for the inverter pressurization is now used on the machines listed above. The improved air lines group with new mounting plate will provide better clearance to the body and provide extended service life.

Adaptable To: The improved 387-7946 Air Lines Gp is adaptable to machines and effective in production with machines that are listed in Table 1.

Table 1
Sales Model     Adaptable to Machines     Effective in production with Machines    
795F AC     S/N:ERM1-294     S/N:ERM295-UP    
795F XQ     S/N:SNT1-101     S/N:SNT102-UP    
Use the following rework procedure in order to update the above listed adaptable machine with the new tube assembly:

Rework Procedure

Table 2
Required Parts List    
Item     Qty     Part Number     Description    
1     1     314-5508     Gasket    
2     1     452-2383     Tube As    
3     4     8T-4137     Bolt    
4     4     8T-4121     Hard Washer    
5     2     9M-6738     Hose Clamp    
6     1     332-1170     Plate    
7     2     8T-4139     Bolt    
8     2     5P-1076     Hard Washer    
9     1     344-5675     Nut    
10     2     7X-7729     Washer    
11     1     8T-4196     Bolt    



    Illustration 1g03727358

  1. Remove 332-2779 Plate As (A) and clamp assembly (B) from the inverter. Discard the parts along with the gasket mounted in between the plate assembly and the inverter.



    Illustration 2g03727979

  1. Remove former 332-1170 Plate (C) and 125-7131 Clip (D). Save clip (D) and discard all other removed hardware.



    Illustration 3g03727980

  1. Install new tube assembly (2) with gasket (1) using four bolts (3) and four hard washers (4). Refer to Illustration 3.



    Illustration 4g03729253



    Illustration 5g03727984

  1. Cut existing 387-7954 Hose (E) to the sufficient length to attach in the tube assembly (2). Refer to Illustration 4 and Illustration 5.

  1. Secure 387-7954 Hose (E) with tube assembly (2) using hose clamp (5) as shown in Illustration 5.



    Illustration 6g03727996

  1. Install plate (6) using two bolts (7) and two hard washers (8) .

  1. Install 125-7131 Clip (D) that was saved in Step 2 using bolt (11), two washers (10), and Nut (9). Refer to Illustration 6.

  1. Start the machine, check for proper operation, and ensure that there are no leaks.

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