PRODUCT SUPPORT PROGRAM FOR REPLACING THE STEERING CYLINDER HEADS ON CERTAIN 795F, 797B/797F OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE STEERING CYLINDER HEADS ON CERTAIN 795F, 797B/797F OFF-HIGHWAY TRUCKS

Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.

This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS53420" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

When submitting claim for Parts Stock Action, Use the appropriate 99Z as the s/n, the appropriate Service Letter Program Number as the Part number in the Part Causing Failure field, "7755" as the Group Number, "56" as the Description Code.

Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible.

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.

TERMINATION DATE

Qty

1946177/">194-6177 Cylinder Head:

1. Remove all 1946177/">194-6177 Cylinder Heads in dealer parts stock and inspect the date code. Refer to Image1 to interpret the date code.

2. Remove all 1946177/">194-6177 Cylinder Heads made prior to October 18, 2016 and refer to Image2 to identify the first new part date code. Take a photograph of the cylinder head date code to attach to the claim.

3. Return all cylinder heads made on October 18, 2016 and later, to dealer parts stock.

Steering Cylinder Groups:

1. Remove all 795F 305-3808 and 305-3809 Steering Cylinder Groups and 797B/797F 194-6171 and 288-5537 Steering Cylinder Groups from dealer parts stock and inspect the date code. Refer to Image1 to interpret the date code.

2. If a cylinder has a cylinder head made on January 1, 2016 but before October 18, 2016, refer to the Disassembly and Assembly Manual and replace the 1946177/">194-6177 Cylinder Head with a new part from Morton. Take a photograph of the cylinder head date code to attach to the claim. Refer to Image2 to identify the first new part date code.

Complete the following steps when repairing the cylinder:

Parts to reuse: Piston and piston seals, sensor (if present), rod, remaining parts in cylinder assembly.

Parts NOT to reuse: Head, parts assembled in the cylinder head (seals, backup ring, bearing), cylinder head bolts, washers, and piston nut.

1. Remove the cylinder head bolts and washers. Carefully pull the rod assembly out of the cylinder assembly to prevent damaging a position sensor, if present. The cylinder head bolts and washers will not be reused. Set the cylinder assembly aside.

2. Remove the piston nut. Set aside the piston and rod for reuse during assembly. Photograph the cylinder head to capture the date code of the cylinder head (Image1 and 2). The piston nut will not be reused.

3. Install new seals, backup ring, and bearing into the new cylinder head. Install the new cylinder head with seals onto the rod. Assemble the piston on the rod. Tighten new nut to complete the rod assembly.

4. Install the rod assembly into the cylinder assembly with care if a position sensor is present. Install and tighten new cylinder head bolts with washers to complete the cylinder group.

5. Return all steering cylinders with cylinder heads made on October 18, 2016 and later to dealer parts stock.

Submit one claim for all parts removed from dealer parts stock.
If a steering cylinder is repaired, claim 2.0 hours of labor and the following parts:

3J-9449 Locknut, Quantity - 1
4J-9218 Ring-Backup, Quantity - 1
6V-8237 Washer, Quantity - 8
8T-0668 Bolt-Hex, Quantity - 2
8T-3329 Ring-Wear, Quantity - 1
9F-1399 Seal-O-Ring, Quantity -1
173-9779 Bolt-HEX, Quantity - 6
1946177/">194-6177 Head, Quantity - 1
311-9316 Seal As-Buffer, Quantity -1
311-9317 Seal U-Cup, Quantity - 1
311-9318 Seal Wiper, Quantity - 1

Attach photographs of the removed 1946177/">194-6177 Cylinder Heads to the parts stock warranty claim.