AC Inverter Cabinet Maintenance and Cover Hardware Update for Certain Large AC Drive Off-Highway Trucks {1054, 4822} Caterpillar

Off-Highway Truck/Tractor

794 AC (S/N: MN556-UP; MT51-UP)

795F AC (S/N: ERM1-UP)

Reference: Operation and Maintenance Manual, SEBU9099, "794 AC Off-Highway Truck"

Reference: Operation and Maintenance Manual, SEBU8349, "795F AC and 795F AC XQ Off-Highway Trucks"

Description Of Change: AC inverter cabinet maintenance procedures, intervals, and cover bolts have been updated for certain Large AC Drive Off-Highway Trucks. Sections of the Operation and Maintenance Manual have been updated.

Adaptable To:

Show/hide table

Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

Maintenance Updates

Clarifying sections or subtitles were added to the following maintenance procedures:

• "Air Filter Element (Inverter Cabinet) - Clean/Replace"

• "Air Filter Element (Inverter Cabinet) - Replace"

• "Inverter Cabinet - Check/Clean"

The maintenance interval for "Air Filter Element (Inverter Cabinet) - Clean/Replace" has been moved to - Every 2000 Service Hours or 1 Year.

Cabinet Hardware

Do not open the inverter cabinet specifically for the purpose of cleaning inside the inverter cabinet. When another service procedure requires the inverter cabinet to be opened, clean inside the inverter cabinet with a vacuum or compressed air.

Note: The maximum air pressure for cleaning purposes must be reduced to 205 kPa (30 psi).

Illustration 1	g06394158
Front view of inverter cabinet (A) Bolt (B) Washer (C) Retaining Washer

When maintenance is performed inside of the cabinet, retaining washers (C) can be removed and discarded if desired. Bolt (A) and washer (B) can be reused or replaced as needed. Refer to table 1 for replacement part numbers.