2014/09/23 Caterpillar

Off-Highway Truck/Tractor:

793F AC (S/N: EMD1-UP)

793F (S/N: SND1-UP; SSP1-UP; RBT1-UP)

Special Instruction, REHS7995, "Procedure to Inspect and Repair the Center Section Frame on Certain 793F Off-Highway Trucks" has been updated with feedback/improvements from the field and sections have been altered to provide additional clarification.

In order to ensure quality robust repair a Quality Control Plan has been added at the end of the document.

The Quality Control Plan and accompanying information and pictures must be attached to SIMsI when submitting the claims on all units from this date forward.

The following information has been updated or added to the Special Instruction:

• Numerous statements have been updated for better clarification

• Added additional inspections

• Repair Option B has been reorganized to represent application

• Added the Quality Control Plan

• Added 4 bar link casting to main rail connection measurement inspection

• Added template for top and bottom rail to ensure that correct profile has been achieved

Note: Reviewing the entire document Special Instruction, REHS7995 is critical, prior to reworking additional machines.