PRODUCT SUPPORT PROGRAM FOR REWORKING THE AIR CONDITIONING COVER ON 621G, 623G, AND 627G WHEEL TRACTOR-SCRAPERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REWORKING THE AIR CONDITIONING COVER ON 621G, 623G, AND 627G WHEEL TRACTOR-SCRAPERS

Usage:

REBE2343-00

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23Jan2008

U-45

A-39

D-36

O-41

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*Before/After*	PRODUCT SUPPORT PROGRAM FOR REWORKING THE AIR CONDITIONING COVER ON 621G, 623G, AND 627G WHEEL TRACTOR-SCRAPERS
7451 7309		PS42608

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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 "PS42608" 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

31Jan2010

PROBLEM

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The existing air conditioning fresh air inlet duct is not sealing properly on certain 621G, 623G, and 627G Wheel Tractor-Scrapers. The poor sealing allows hot air to enter the cab through the fresh air inlet. This can result in the air conditioning system not cooling the cab properly.

AFFECTED PRODUCT

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Model	Identification Number
621G	DBB00200-00340, 342-343, 345-350, 352
623G	DBC00150-00191, 193-194, 196, 198, 200-222, 224-274
627G	DBD00250-00417, 419-425

PARTS NEEDED

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Qty	Part Number	Description
4	8T4970	BOLT
4	9X8256	WASHER
1	2856073	PLATE AS
4	2856879	PLATE
1	2857366	INSULATION
1	2967677	INSULATION
In Order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 9% of dealership population. This is an inital 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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Replace the existing plate assembly with a new 285-6073 plate assembly and related parts. See the attached procedure.

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Image1

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%
0-10000 hrs, 0-36 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

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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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Removal:
1. Open the air conditioning cover on the machine, pull the rod assembly out, and swing it around so it can attach to the body of machine to hold the door open.
2. With the door secure, remove and retain the four bolts and washers holding the old plate assembly on and remove and discard the old plate assembly, (image 1.1.1).

Image1.1.1

3. Clean the area and fiberglass door of any debris or dust to prepare it for installation of the new parts. The fiberglass door will need to be very clean where the plate assembly mounts because it will have a seal applied to it.
4. Remove existing seals on air conditioning intake if there are any present, (image 1.2.1).

Image1.2.1

Installation:
1. Place the new 285-6073 Plate Assembly on its side.
2. Install one of the 285-6879 Plates on the side of the new plate assembly with a new 8T-4970 Bolt and a 9X-8256 Washer. Position the new plate so that the angle opens up, (image 1.3.1).
3. Install one of the 285-6879 Plates on the short end of the plate assembly with a new 8T-4970 Bolt and a 9X-8256 Washer. Position the plate such that the angle opens down, (image 1.3.1).
4. Flip the plate assembly and repeat for opposite side.

Image1.3.1

5. Flip the plate assembly onto its back, remove protective paper covering the adhesive on the 296-7677 Insulation piece, and apply the 296-7677 Insulation piece adhesive side down.
6. The thick end of the insulation goes on the end of the plate assembly with the flange, (image 1.4.1).
7. Press insulation against plate assembly to make sure it is fully adhered.

Image1.4.1

8. With the area clean, remove the protective paper covering the adhesive on the 285-7366 Insulation piece and apply the 285-7366 Insulation piece adhesive side down to the fiberglass door.
9. Place the end of the seal up against the hinge assembly and work towards the fresh air intake holes, (image 1.5.1)

Image1.5.1

10. Mount the new plate assembly to the air conditioning cover with the existing four M6 bolts and four hard washers, (image 1.6.1).

Image1.6.1

11. Ensure the plate assembly is sealed against the door and tighten all bolts to a torque of 12 Nm.
12. Release the rod assembly from the body of the machine and latch it back to the cover.
13. Close cover and test air conditioning operation. Refer to SENR5664 for air conditioning test procedure.