0394908 JOHNSON PISTON, Std. 2.6

Introduction
The following procedure provides the needed information to install circuit protection for the engine prelubrication pump system on 793F Off-Highway Trucks. Completing the following procedure will help to protect the system against shorts to ground.Safety
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
When it is necessary to work under the machine with the body (bed) raised, attach the body (bed) retaining cable to the rear tow point. Install the rear tow point pin through the end of the retaining cable.Failure to properly secure the body (bed) may result in personal injury or death.
Falling Hazard. May cause personal injury or death. Always attach safety lanyard to appropriate fixing point.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Required Parts
Table 1
Required Parts    
Item     Qty     Part Number     Description    
1     1     263-6726     Seal Plug    
2     1     326-8116     Fuse    
3     1     267-2746     Cover As    
4     2     264-3617     Lockwasher    
5     2     7X-0608     Hard Washer    
6     2     5C-7261     Nut    
7     1     446-9281     Bracket As    
8     2     5C-9553     Bolt    
9     2     9X-8256     Washer    
10     4     8T-4136     Bolt    
11     4     7X-7729     Washer    
12     3     344-5675     Nut    
13     1     446-9282     Cable As    
14     2     5P-6264     Grommet    
15     4     8T-4121     Hard Washer    
16     3     7K-1181     Cable Strap    
17     2     8T-1889     Clip    
18     2     8T-1890     Clip    
19     2     177-4562     Grommet    
20     1     204-2281     Cable Strap    Prepare the Machine
Note: Permit only one operator on the machine. Either keep other personnel away from the machine, or keep other personnel in the sight of the operator.
Refer to Operation and Maintenance Manual, SEBU8406, "Prepare the Machine for Maintenance" or Operation and Maintenance Manual, SEBU8751, "Prepare the Machine for Maintenance".Procedure
Illustration 1 g03880416
View of the breaker box assembly
Remove the cover from the breaker box assembly. Retain the cover and all mounting hardware.
Illustration 2 g03880475
(A) Cable assembly (B) Clipping (C) Grommet (D) Bolt (E) Washer (F) Spacer (G) Nut
Remove and discard clipping (B), grommet (C), bolt (D), washer (E), spacer (F), and nut (G) .Disconnect cable assembly (A) from the junction block.