PRODUCT SUPPORT PROGRAM TO REWORK THE E-STICK ON CERTAIN 442E AND 444E BACKHOE LOADERS Caterpillar

PRODUCT SUPPORT PROGRAM TO REWORK THE E-STICK ON CERTAIN 442E AND 444E BACKHOE LOADERS [REBE1282]

HYDRAULIC SYSTEM

CYLINDER GP

PRODUCT SUPPORT PROGRAM TO REWORK THE E-STICK ON CERTAIN 442E AND 444E BACKHOE LOADERS

REBE1282-00

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19Sep2006

U-638

D-605

O-620

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*After Failure Only*	PRODUCT SUPPORT PROGRAM TO REWORK THE E-STICK ON CERTAIN 442E AND 444E BACKHOE LOADERS
6533 5458 5486		PS51226

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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 "PS51226" 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 AVSpare product analyst.

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TERMINATION DATE

30Sep2008

PROBLEM

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The stick cylinder rod can foul the E-stick inner section on certain 442E and 444E Backhoe Loaders. If the foul occurs, it may cause damage to the cylinder rod surface or E-stick structure.

AFFECTED PRODUCT

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Model	Identification Number
442E	GKZ00290-00302, 304-307, 309-311, 315-319, 321-325
444E	LBE00311-00319, 321-322, 324-325

PARTS NEEDED

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No parts needed for this program

ACTION REQUIRED

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The foul can only occur when the stick is brought to the fully in position (see image below). The foul condition usually produces a witness mark on the e-stick inner section and may also deform the plate.
If this situation occurs, use the attached rework procedure to provide relief for the cylinder rod during operation.

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Image1

SERVICE CLAIM ALLOWANCES

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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%
0-1500 hrs, 0-12 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 2.0-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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1.Position the machine as shown in Figure 1.1.1.

Image1.1.1

2.Remove the stick cylinder rod mounting pin circlip and withdraw the mounting pin. Note the postion of any shims on either side of the rod eye.
3.Using the machine hydraulics, retract the stick cylinder rod while supporting the cylinder as shown in Figure 1.2.1.

Image1.2.1

4.Using the dimensions shown in Figure 1.3.1, mark out the section of material to be removed.

Image1.3.1

5.Protect the internal areas of the E-stick as shown in Figure 1.4.1.
6.Using the dealers preferred method, cut away the marked out area.
7.Once all necessary material has been removed, dress the area to remove any sharp edges and prepare the area for painting.

Image1.4.1

Image1.4.2

8.Repaint the affected area.
9.Re-connect the stick cylinder rod. Ensure any shims removed during disassembly are replaced as these prevent rattle during operation.
10.Raise the backhoe arm and remove the inspection plate at the end of the e-stick (Figure 1.5.1). Clean out any material which may have fallen down inside the structure. Replace the inspection plate when finished.
11.Check machine operation to ensure sufficient clearance has been introduced.