PRODUCT SUPPORT PROGRAM FOR REWORKING AND INSTALLING A NEW INSULATION SLEEVE AND TUBE ASSEMBLY TO THE 380-0633 PRE-HEATER GROUP ON CERTAIN 521B AND 522B TRACK FELLER BUNCHERS, EQUIPPED WITH THE ARCTIC START ARRANGEMENT Caterpillar

PRODUCT SUPPORT PROGRAM FOR REWORKING AND INSTALLING A NEW INSULATION SLEEVE AND TUBE ASSEMBLY TO THE 380-0633 PRE-HEATER GROUP ON CERTAIN 521B AND 522B TRACK FELLER BUNCHERS, EQUIPPED WITH THE ARCTIC START ARRANGEMENT

Usage:

TEBE5055-02

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14Sep2016

(Revised 29Nov2016)

U-472

A-344

D-406

O-406

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Before/After	PRODUCT SUPPORT PROGRAM FOR REWORKING AND INSTALLING A NEW INSULATION SLEEVE AND TUBE ASSEMBLY TO THE 380-0633 PRE-HEATER GROUP ON CERTAIN 521B AND 522B TRACK FELLER BUNCHERS, EQUIPPED WITH THE ARCTIC START ARRANGEMENT
1333 1296 1383		PS45221

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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 "PS45221" 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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NOTE:	This Revised Service Letter replaces the 14Sep2016 (Revised 13Oct2016) Service Letter. Changes have been made to the Affected Product.

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TERMINATION DATE

30Sep2018

PROBLEM

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The existing 324-9706 Insulation used on the 380-0633 Pre-Heater Group, surrounding the exhaust pipe, may be loosely fitted and can get pushed back by limbs and other foreign objects, from underneath the upper frame during machine operation on certain 521B and 522B Track Feller Bunchers, equipped with the Arctic Start Arrangement. This exposes the hot exhaust pipe to debris located under the oil pan.

AFFECTED PRODUCT

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Model	Identification Number
521B	F7B00276-00379
522B	F7C00251-00333

PARTS NEEDED

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Qty	Part Number	Description
1	8T6703	CLAMP-BAND
1	5077544	INSULATION AS
1	5149251	PIPE AS
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 11% 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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Refer to the attached Rework Procedure.

It is important to rework, reroute, and install the new exhaust sleeve insulation over the existing flex exhaust pipe and install the new tube assembly according to the Service Letter and Special Instructions to help eliminate limbs and other foreign objects, underneath the upper frame plate, from pushing the installation back from the exhaust pipe. Clean-out and rework are required for machines equipped with a pre-heater group for Arctic Start Arrangement.

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Image1

Image2

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%

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NOTE: This is a 3.0-hour job

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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. Remove the old 324-9706 Insulation Assembly from the existing flex pipe, and then re-clamp the flex pipe to the exhaust end of the pre-heater group.

2. Install the 514-9251 Pipe Assembly to the upper frame. Refer to Image1 in Image1.1.1.

3. Weld the pipe assembly plate to the underneath side of the upper frame plate at four equally spaced locations using a 5mm fillet x 25.4mm lg. weld.

4. Insert the existing flex pipe into the 514-9251 Pipe Assembly.

5. Wrap the new 507-7544 Insulation Assembly over the flex pipe.

6. Finish by clamping the insulation assembly to the pipe assembly using an 8T-6703 Band Clamp. Refer to Image2 in Image1.1.1.