PRODUCT SUPPORT PROGRAM FOR REPLACING THERMAL FUSE ON CERTAIN 336E AND 336F EXCAVATORS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THERMAL FUSE ON CERTAIN 336E AND 336F EXCAVATORS

Usage:

TEBE5463-00

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05Apr2017

U-185

D-141

O-147

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Before/After	PRODUCT SUPPORT PROGRAM FOR REPLACING THERMAL FUSE ON CERTAIN 336E AND 336F EXCAVATORS
5077		PS45438

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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 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 "PS45438" 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.

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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

30Apr2019

PROBLEM

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The existing thermal fuse can leak nitrogen gas from the accumulator at early hours of operation on certain 336E and 336F Excavators.

AFFECTED PRODUCT

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Model	Identification Number
336E H	HDW00237-00256
336E L H	JEA00177-00190
336F H	NAJ00114
336F L H	LTP00294, 310
336F LXE	DFY00267-00270

PARTS NEEDED

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Qty	Part Number	Description
1	3965874	THERMAL FUSE (1 PER 1 ACCUMULATOR (IF REQUIRED)
1	5253585	WRENCH (IF REQUIRED)
1	NITROGEN_GAS	32 L (8.45 US GAL PER ACCUMULATOR (IF REQUIRED)
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 7% 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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Inspect the thermal fuse. If the thermal fuse contains incorrect parts, replace it with new one. Refer to the attached Rework Procedure.

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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%
0-2000 hrs, 0-12 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 1.0-hour job
Note : This is a 1.0 hour job to inspect the thermal fuse. Note : Up to 5.0 hours will be allowed for thermal fuse replacement.

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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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NOTE: Ensure that all safety information, warnings, and instructions are read and understood before any operation or any maintenance procedures are performed. Refer to the Operation and Maintenance Manual "Safety Section".

1. Park the machine on a hard level surface, and ground the bucket/tool. Refer to the Operation and Maintenance Manual.

2. Stop the engine and lock the hydraulic lockout control.Ensure that all residual pressure is removed. Refer to UENR0445, Disassembly and Assembly, "System Pressure - Release", for additional information.

Inspection of the Existing Thermal Fuse:

1. Remove guard (1) attached to the counter weight. Refer to Image1.2.1.

Image1.2.1

2. Inspect the hole on 396-5874 Thermal Fuse (2). Refer to Image1.3.1.

3. If the melting cylinder is shorter than correct thermal fuse by 2mm, the part is incorrect. Replace the existing incorrect thermal fuse with new one. Refer to Image1.3.2.

Image1.3.1

Image1.3.2

Replacement of the Thermal Fuse:

1. Release the nitrogen gas from the accumulator. Refer to UENR0445,Testing and Adjusting, "Accumulator (Swing) Test and Charge".

2. Remove the existing thermal fuse with a 525-3585 Hook Wrench. Refer to Image1.4.1.

Note: Before removing the thermal fuse, confirm that the nitrogen gas has been depressurized.

Image1.4.1

4. Install the new 396-5874 Thermal Fuse with the hook wrench. The lever arm with the hook wrench is extended compared to the lever arm with the original wrench face. The set torque has to be calculated in order to receive the right torque of 20 -0/+5 N.m. Refer to the example calculation in Image1.5.1.