PRODUCT SUPPORT PROGRAM FOR REPLACING THE TAPERED PIN AND RELATED HARDWARE FOR THE LOWER SWING FRAME JOINT ON CERTAIN 416D, 420D, 424D, 428D, 432D, AND 442D BACKHOE LOADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE TAPERED PIN AND RELATED HARDWARE FOR THE LOWER SWING FRAME JOINT ON CERTAIN 416D, 420D, 424D, 428D, 432D, AND 442D BACKHOE LOADERS [REBE1948]

FRAME AND BODY

FRAME GP

PRODUCT SUPPORT PROGRAM FOR REPLACING THE TAPERED PIN AND RELATED HARDWARE FOR THE LOWER SWING FRAME JOINT ON CERTAIN 416D, 420D, 424D, 428D, 432D, AND 442D BACKHOE LOADERS

REBE1948-00

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20Nov2007

U-602

A-491

D-493

O-528

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Before/After Parts stock action needed	PRODUCT SUPPORT PROGRAM FOR REPLACING THE TAPERED PIN AND RELATED HARDWARE FOR THE LOWER SWING FRAME JOINT ON CERTAIN 416D, 420D, 424D, 428D, 432D, AND 442D BACKHOE LOADERS
6506		PS42561

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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 "PS42561" 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:

Although this Program is to be administered as described above on the Affected Product, parts should be removed form parts stock as soon as possible.

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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 AVSpare product analyst.

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TERMINATION DATE

30Nov2009

PROBLEM

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The 130-0484 and 9R-0234 Tapered Pin for the lower swing frame joint may prematurely fail on certain 416D, 424D, 428D, 432D, and 442D Backhoe Loaders. An improved tapered pin is available.

AFFECTED PRODUCT

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Model	Identification Number
416D	BGJ01050-01315
420D	BKC00920-00922 BMC01060-01078
424D	CJZ00270-00292 RXA00200-02672
428D	BXC00220-02370 DSX00210-00655, 657-997 MBM00230-00328
432D	TDR00240-00406, 410-663 WEP00250-01593, 1596, 1598-1702, 1704-1706, 1709-1712, 1714-1716, 1718-2821
442D	SMJ00150-00586 TBD00260-00351

PARTS NEEDED

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Qty	Part Number	Description
1	3B8489	FITTING
1	8T3652	NUT
1	8T4837	WASHER-PLATED
1	3005442	PIN
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 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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****Parts Stock ****

Remove all 130-0484 Tapered Pins from dealer parts stock (part number is stamped on the end of the pin).

****Affected Product****

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A new 300-5442 Pin has improved fatigue life by increasing heat treat area and also increased the radius at thread base from 0.8mm to 3mm radius. Refer to the attached rework procedure for remove and installing the pin.
Before Failure: Replacing the tapered pin and hardware prior to cracks or breaking of the tapered pin. Use "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code.

After Failure: Replacing the pin and hardware after the tapered pin has cracked, broken or come loose. If the pin has come loose, inspect the taper bore in the swing casting before fitting a new pin. If the bore has been significantly damaged, the swing casting must be replaced. Use "96" as the Warranty Claim Description Code and "Z" as the SIMS Description Code.

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SERVICE CLAIM ALLOWANCES

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****Parts Stock****

Submit one claim for all parts removed from dealer parts stock.

****Affected Product****

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Product smu/age whichever comes first	AVSpare		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-3000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
3001-6000 hrs, 25-48 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

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NOTE: This is a 1.0-hour job

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PARTS DISPOSITION

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****Parts Stock****

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

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****Affected Product****

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

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Rework Procedure

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Park the machine in a suitable area on firm level ground.

Lower the stabilizer legs to the ground. Lower the front loader bucket to the ground.

Install the rear swing frame lock pin into position with the hoe in the straight out position, and place the hoe bucket on the ground with the stick vertical. See Image 1.1.1.

Refer to Dissassembly and Assembly Manual, RENR3578, "Hydraulic System Pressure - Release".

Image1.1.1

Remove the nut and washer from the lower pin, and tap the pin downward with a copper mallet. The pin will fall out of the bore from below the machine.

Image1.2.1

Install the new tapered pin into the bore using the new nut and washer.

Note: When installing the new pin, the taper pin bore must be cleaned with degreaser to remove grease of protective coatings. The bore of the swing casting and the taper of the pin must be cleaned with isopropyl alcohol prior to assembly.

Apply 185-3998 High Strength Threadlock to the threads on the pin prior to installing the nut.

Tighten the lower swing frame pin nut to a torque of 1250 +/- 135 N.m (922 +/- 100 lb ft).

With the new hardware fitted, start the machine and remove the swing lock pin.

To ensure the taper is seated correctly, the hoe must be worked for a short time and then the nut re-torqued. The following procedure should be followed:

1. Lift the boom and stick off the ground. Cycle the swing cylinders 10 times without hitting the swing casting.
2. Cycle the stick cylinder 10 times.
3. Cycle the boom cylinder 10 times. Cycle the boom cylinder though the snubber when raising the boom.

Re-install the swing lock pin. Lower the implements to the ground and stop the engine.

Re-tighten the lower swing frame lock pin nut to a torque of 1250 +/- 135 N.m (922 +/- 100 lb ft).
Note: The swing frame lock pin must be installed when applying torque to the nut.