PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING THE REAR CAB SUPPORT ON CERTAIN 784B AND 784C OFF-HIGHWAY TRACTORS AND 785, 785B, 785C, 785C HAA, 789, 789B, 789C, 793, 793B AND 793C OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING THE REAR CAB SUPPORT ON CERTAIN 784B AND 784C OFF-HIGHWAY TRACTORS AND 785, 785B, 785C, 785C HAA, 789, 789B, 789C, 793, 793B AND 793C OFF-HIGHWAY TRUCKS

Usage:

SEBE9439-02

January 5, 2006
(Revised September 2006)
U-5
A-5
D-5
O-6

Show/hide table

*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING THE REAR CAB SUPPORT ON CERTAIN 784B AND 784C OFF-HIGHWAY TRACTORS AND 785, 785B, 785C, 785C HAA, 789, 789B, 789C, 793, 793B AND 793C OFF-HIGHWAY TRUCKS
7264 7266 7301		PI30799

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI30799" as the Part number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI30799" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

NOTE: This Revised Service Letter replaces the January 5, 2006 (Revised July 2006) Service Letter. A change was made to the Affected Product.

Show/hide table

COMPLETION DATE	TERMINATION DATE
July 31, 2006	January 31, 2007

PROBLEM

The rear cab support needs to be inspected and, if necessary, replaced on certain 784B and 784C Off-Highway Tractors and 785, 785B, 785C, 785C HAA, 789, 789B, 789C, 793, 793B, and 793C Off-Highway Trucks. Corrosion may occur inside the left end of the main beam of the frame and inside the rear cab support. With few exceptions, corrosion will not be apparent from the exterior of machine.

AFFECTED PRODUCT

Show/hide table

Model	Identification Number
784B	5RK00001-25
784C	2PZ00001-105
785	8GB00001-124, 125-159, 162-179, 182-183, 185-697, 75118-75120, 75226-75228
785B	6HK00001-252, 254, 258-332, 334-400, 404-487, 489-502, 504-649, 651-846, 848-987, 78001-78006, 75001-75003, 76001-76003
785C	1HW00001-134
785C	APX00001-359
785C HAA	5AZ00001-114, 264-273
789	9ZC00001-677
789B	7EK00001-155, 158-688, 75001, 75002
789C	2BW00001-160, 303-604
793	3SJ00001-9, 11-56, 75001
793B	1HL00001-16, 18-193, 195-195, 198-206, 208-226, 228-228, 230-264, 266-319, 321-334, 337-351, 353-524, 75001-75003, 76001-76004, 78001-78005
793C	4AR00001-107, 109-424, 77001
793C	4GZ00001-151, 153-164, 168-175, 178-190, 192-216, 218-232, 234-264, 77001-77005, 77009-77012
793C	ATY00001-575

PARTS NEEDED

Dealers will not need to order parts for this Program.

Show/hide table

Quantity	Part Number	Description
n/a	n/a	None Required

ACTION REQUIRED

Dealers will attempt to prioritize machine inspections within their service territory based on service meter hours (SMU). Machines with the highest SMU will be inspected first.

Inspect the main beam of the frame and rear cab support of the machine as indicated in the special instruction specific to the tractor/truck model:

1. For 784B, 784C, 785, 785B, 785C and 785C HAA, refer to media number: REHS1525.

2. For 789, 789B and 789C, refer to media number: REHS2416.

3. For 793, 793B and 793C, refer to media number: REHS2417.

Determine the condition and appropriate repair for the main beam and rear cab support. Notify your customer of the condition of the machine. The results of each machine inspection are to be entered into SIMS. If all thickness measurements were above the minimum, then description code "T" should be used in the warranty claim. If any thickness measurements were below the minimum, then description code "Z" should be used in the warranty claim.

After completing the inspection, refer to PS41820. This Service Letter provides details for an exhaust modification and repair options. If you have any questions, please contact your Service Representative for direction.

OWNER NOTIFICATION

U.S. and Canadian owners will receive the attached Owner Notification.

SERVICE CLAIM ALLOWANCES

Show/hide table

Caterpillar		Dealer Suggested		Customer Suggested
Parts	Labor Hrs.	Parts	Labor Hrs.	Parts	Labor Hrs.
100%	2	0	0	0	0
NOTE: This is a 2-hour job to inspect the affected product and notify the customer of the results.
NOTE: U.S. and Canadian Dealers Only - Eligible dealers may enter a Type 2 SIMS Report.

PARTS DISPOSITION

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

Attach. (1-Owner Notification)

COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING THE REAR CAB SUPPORT ON CERTAIN OFF-HIGHWAY TRACTORS AND OFF-HIGHWAY TRUCKS

MODELS INVOLVED - 784B AND 784C OFF-HIGHWAY TRACTORS AND 785, 785B, 785C, 785C HAA, 789, 789B, 789C, 793, 793B, AND 793C OFF-HIGHWAY TRUCKS

Dear Caterpillar Product Owner:

In some off-highway tractors and trucks, internal corrosion may have affected the rear cab support and a portion of the frame. An inspection of the rear cab support and the left side of the main beam is necessary. Based on the results of the inspection, repair of the machine may be required.

Please contact your local Caterpillar dealer immediately to schedule a service appointment. The dealer will advise you of the time required to complete this service. Please refer the dealer to their Service Letter dated January 5, 2006 when scheduling this service.

We regret the inconvenience this may cause you, but urge you to allow your local Caterpillar dealer to inspect and, if necessary, repair your off-highway tractor or truck.

Caterpillar Inc.

Identification #(s)

Attached to January 5, 2006 Service Letter