PRODUCT SUPPORT PROGRAM FOR REPLACING THE PISTONS ON CERTAIN 793F OFF-HIGHWAY TRUCKS Caterpillar


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PRODUCT SUPPORT PROGRAM FOR REPLACING THE PISTONS ON CERTAIN 793F OFF-HIGHWAY TRUCKS [UEBE1079]
BASIC ENGINE
CYLINDER BLOCK GP
PRODUCT SUPPORT PROGRAM FOR REPLACING THE PISTONS ON CERTAIN 793F OFF-HIGHWAY TRUCKS
UEBE1079-01

28Jul2020
(Revised 28Sep2020)


N01H
N020
N030
N064

 

Before/After

 (Limited distribution) 
  

PRODUCT SUPPORT PROGRAM FOR REPLACING THE PISTONS ON CERTAIN 793F OFF-HIGHWAY TRUCKS

1218 1215 1216 1201
PS46807
NOTE:

AVSpare’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 AVSpare.

NOTE:

This Program must be administered either before or after failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS46807" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. If administered after failure, use "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 AVSpare product analyst.

 
NOTE:

This Revised Service Letter replaces the 28Jul2020 Service Letter. Changes have been made to the Action Required, Parts Disposition, and added Rework Procedure.


TERMINATION DATE

31Jul2022

PROBLEM

Pistons installed in certain C175-16 Engines may crack on certain 793F Off-Highway Trucks.

AFFECTED PRODUCT

Model Identification Number
793F  D3T00146-00147, 152-153, 156-157

PARTS NEEDED

Qty

Part Number Description
4 3P0656 SEAL-O-RING
24 5H6733 SEAL-O-RING
1 5P4057 SEAL-O RING
4 6V1196 SEAL-O-RING
1 6V3968 SEAL-O-RING
16 8T0106 BOLT-HEX HEAD
1 8T0372 BOLT
8 20R2805 ROD GP-CONN
8 20R2806 ROD GP-CONN
1 1076280 SEAL-O-RING
1 1776911 SEAL-O-RING
16 2153198 SEAL-FUEL SYSTEM
64 2287089 SEAL-O-RING-ORFS
1 2300940 SEAL-PIP
32 2531238 RETAINER-PIN
32 2539950 SEAL-O-RING
16 2542054 RING-PISTON-OIL
16 2589925 GASKET-COMB
16 2589926 GASKET
4 2697885 SEAL-O-RING
16 2868928 RING-PISTON
4 3449285 RING
16 3618205 SEAL-FUEL SYSTEM
16 3618206 SEAL-FUEL SYSTEM
16 3618207 SEAL-FUEL SYSTEM
16 3708028 SEAL-INTEGRAL
16 3766458 BEARING-CONN ROD
16 3813969 SLEEVE
1 3917216 SEAL-PIP
1 3917217 SEAL-PIP
16 3924608 PIN-PISTON
32 4226176 SEAL-O-RING
4 4435940 BELLOWS AS
16 4714230 LINER-CYLINDER
16 4772235 PISTON AS
16 4772236 RING-PISTON
8 4906439 CLAMP
32 4983113 INSERT-BOLT
2 5216093 ELEMENT-LUBE OIL
28 5247818 SEAL-O-RING
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.


ACTION REQUIRED

Refer to the attached Rework Procedure.

SERVICE CLAIM ALLOWANCES

Product smu/age whichever comes first
AVSpare
Dealer Suggested
Customer Suggested
Parts %
Labor Hrs%
Parts %
Labor Hrs%
Parts %
Labor Hrs%
0-20000 hrs,
0-24 mo 
100.0%
100.0%
0.0%
0.0%
0.0%
0.0%
 NOTE: This is a 240.0-hour job



PARTS DISPOSITION

Hold all connecting rods for a Parts Return Request (PRR). A Parts Return Request (PRR) will be issued to you through the Send-It-Back process after the claim is submitted. Make sure to list the service letter program number on the packing slip and include the closed work order paperwork. Handle all other parts in accordance with your Warranty Bulletin on warranty parts handling.

If a Parts Return Request (PRR) is not issued to you after 30 days through the Send-It-Back process, handle the parts in accordance with your warranty bulletin on warranty parts handling.
 
 
 


Rework Procedure


 
Replace all of the 477-2237 Pistons and related components with 477-2235 Pistons.

Refer to Disassembly and Assembly, M0080117 for cylinder pack removal and installation.
 
Each connecting rod bolt should be marked per the instructions below prior to removal.

Hold all connecting rod bolts that were removed. Refer to the Parts Disposition.

Each rod bolt head should be marked with a single dot by a paint pen to indicate the orientation to the front of the engine. See Image1.2.1.
Image1.2.1
 
Image1.2.1: Rod bolt position numbers for even and odd cylinders. Note front (forward, FWD) of engine direction and paint dot to indicate bolt orientation.

When a rod bolt is removed from the connecting rod, it should be marked with the cylinder number (CYL 1, CYL 2, etc etc) and position number (#1, #2, #3, #4, #5 or #6) by paint pen. See numbering scheme in Image1.2.1.

As examples, the bolt from position 5 in cylinder number 4 would be marked as CYL 4 ? #5. The bolt from position 1 in cylinder 15 would be marked CYL 15 ? #1
 
 

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