PRODUCT SUPPORT PROGRAM FOR REPLACING THE 8N-1721 CONNECTING RODS ON CERTAIN 527 TRACK-TYPE SKIDDERS POWERED BY A 3304 ENGINE Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE 8N-1721 CONNECTING RODS ON CERTAIN 527 TRACK-TYPE SKIDDERS POWERED BY A 3304 ENGINE

Usage:

TEBE5606-00

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14Dec2016

U-649

A-466

D-542

O-545

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After Failure Only	PRODUCT SUPPORT PROGRAM FOR REPLACING THE 8N-1721 CONNECTING RODS ON CERTAIN 527 TRACK-TYPE SKIDDERS POWERED BY A 3304 ENGINE
1225		PS53361

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NOTE:	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.
NOTE:	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 "PS53361" 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.

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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.

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TERMINATION DATE

31Dec2018

PROBLEM

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The existing 8N-1721 Connecting Rod could have pin bushing retention issues on certain 527 Track-Type Skidders powered by a 3304 Engine. If the existing connecting rod bushing spins it will cause damage to cylinder pack.

AFFECTED PRODUCT

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Model	Identification Number
527	JSR00300-00311 PTR00302-00377, 381-508, 511-521, 523-526, 528-542, 544-545, 547-590, 595-598, 600-605, 609-612, 614, 617-618, 621-623, 628-635, 637, 639-647, 662, 671-676, 679, 681-685

PARTS NEEDED

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Qty	Part Number	Description
3	1B7709	BOLT
14	1D4595	BOLT
1	1P0451	GASKET-TURBO
1	1R0750	FILTER AS-FUEL
1	1R1807	FILTER-LUBE
8	1S9543	RETAINER-PISTON
4	2W1707	RING-PISTON TOP
4	2W1708	RING-PISTON
4	2W6134	BAND-FILLER
1	3S5496	SEAL-O-RING
1	4P8915	GASKET-CYL HEAD
5	5B9603	BOLT
1	5S6045	GASKET-OPN PLATE
1	5S6735	GASKET
4	6I0497	RING-PISTON
4	7N8018	SEAL-WATER
4	7N9805	PIN-PISTON
1	7W7544	GASKET-PLATE
4	8N1721	ROD AS-CONN
1	8S1606	GASKET-COVER
1	8S1963	GASKET-OIL PAN
4	9L9098	SEAL-CARBON STOP
12	9Y1798	SEAL-WATER
2	9Y1979	GASKET-MANIFOLD
4	1143362	SEAL-FUEL SYSTEM
4	1654262	BODY AS-PISTON
4	2712489	SEAL-WASHER
4	3285572	BEARING-ROD
4	3715941	LINER-CYLINDER
12	4565581	SEAL-O-RING
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 3% 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

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Upon failure of the pin bushing replace with new rod assemblies. Refer to the Disassembly and Assembly manual and the attached Rework Procedure for cylinder pack replacement. Document the rod serial number with photos and record what engine serial number they were removed from.

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-4000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
4001-8000 hrs, 25-48 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

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NOTE: This is a 30.0-hour job
The rod serial numbers with photos and what engine serial number they were removed from must be included in the claim story.

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PARTS DISPOSITION

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

Rework Procedure

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1. Remove engine from equipment chassis. Reference SENR9418 Disassembly and Assembly for details to remove engine arrangement from machine chassis and to separate the engine from transmission. Install fluid line connection protection to prevent debris entry.

2. Reference Disassembly and Assembly SENR5598 for details of engine disassembly and assembly. Mount engine assembly to suitable tooling to allow oil pan and cylinder head assembly removal.

3. Remove fuel injector lines, valve mechanism cover, valve mechanism group, and cylinder head group.
Note: It is not necessary to remove exhaust manifold, turbocharger, or fuel injectors from the cylinder head assembly to perform this rework procedure.

4. Disconnect turbocharger oil supply tube assembly and oil drain tube assembly from the turbocharger and cylinder block assembly.

5. Remove engine oil sump and engine oil pump pickup tube assembly.

6. Remove piston and connecting rod assemblies from the cylinder block.
a. Remove connecting rod bolt nuts and rod cap.
b. Install bolt thread protection on connecting rod bolts to prevent damage to crankshaft journal.
c. Remove the piston cooling jets before removing piston and connecting rod assembly. Carefully remove piston & rod gp. from cylinder bore. Re-install connecting rod cap to rod and finger tighten nuts.
d. Document the rod serial number with photos and the engine serial number they were removed from. This information must be included in the claim story.

7. Remove liner from the cylinder block. Discard the liners and piston and rod group.

8. Assemble replacement cylinder pack. Reference SENR5598 Pistons and Connecting - Assemble.
9. Install the pistons and connecting rods into cylinder block assembly. Refer to SENR5598 Disassembly and Assembly, "Pistons and Connecting Rods - Install"

10. The remaining engine assembly is the reverse of above steps. Reference SENR5598 and SENR1030 for details on engine assembly, torque specifications and valve lash setting specifications.
Note: Do not reuse cylinder head bolts, O-ring seals or gaskets on joints that were separated during this rework procedure.

11. Re-install engine assembly onto transmission and into machine per SENR9418 Disassembly and Assembly.
Do not reuse O-ring seals or gaskets on joints that were separated during this rework procedure.

Refill fluids.

Run engine. Check for fluid leaks.