PRODUCT SUPPORT PROGRAM FOR ADJUSTING THE BACKHOE CONTROL MOUNTING ON CERTAIN 432E, 434E, 442E AND 444E BACKHOE LOADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR ADJUSTING THE BACKHOE CONTROL MOUNTING ON CERTAIN 432E, 434E, 442E AND 444E BACKHOE LOADERS [REBE1246]

HYDRAULIC SYSTEM

VALVE GP-BANK

PRODUCT SUPPORT PROGRAM FOR ADJUSTING THE BACKHOE CONTROL MOUNTING ON CERTAIN 432E, 434E, 442E AND 444E BACKHOE LOADERS

REBE1246-00

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02Oct2006

D-624

O-642

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR ADJUSTING THE BACKHOE CONTROL MOUNTING ON CERTAIN 432E, 434E, 442E AND 444E BACKHOE LOADERS
5705 5051 5063		PS51231

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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 "PS51231" 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

31Oct2008

PROBLEM

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The Backhoe Control Mounting can fail to fully latch into the working position on certain 432E, 434E, 442E and 444E Backhoe Loaders. The failure may be evident as either the mounting structure being loose when latched into the working position, or by vibrations felt through the control levers by the operator.

AFFECTED PRODUCT

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Model	Identification Number
432E	BXE00269-00340, 342-351, 353-395, 397-449, 451-453, 455-458, 461-489, 491-493, 496-497, 499-509, 515, 522-524, 526, 530-533, 535-536, 540-544, 546
434E	FSH00286-00318, 321-326, 328-330, 332, 335-338, 340-343, 345, 347, 354
442E	GKZ00295-00307, 309-311, 313-317, 325
444E	LBE00319-00325

PARTS NEEDED

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Qty	Part Number	Description
4	2040751	SHIM
4	2197627	SHIM
2	8T4908	BOLT-HEX HEAD

ACTION REQUIRED

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See the attached rework procedure.

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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	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.Remove the floormat and rear floorplate to gain access to the top of the backhoe valve. Refer to Disassembly and Assembly Manaul, RENR6485, "Bank Valve (Backhoe) ? Remove" Steps 4 and 5.

2.Move the backhoe control pod structure to the working position and check for clearance between the cross bar assembly and the support rib on the valve bracket, as shown in Image 1.1.1. If no clearance exists, or the pod structure fouls on the valve bracket and cannot be locked fully into the working position, follow the remaining steps to adjust the assembly.

Image1.1.1

3.Check the position of the Left and Right hand pods relative to one another. The pods should be level when viewed from the side. If they are out of alignment, loosen the cross bar retaining bolts (Image 1.2.1 & 1.2.2), adjust the position of the RHS tower and re-tighten the cross bar bolts to 55+/-10Nm. If this fails to produce sufficient clearance, or the pods are already aligned correctly, complete the remaining steps in this rework procedure.

Image1.2.1

Image1.2.2

4.Remove the plastic pod covers from both the LH and RH pods.

5.Loosen the six 7X-2533 Bolts which retain the control assembly latches (Image 1.3.1).

Image1.3.1

6.Loosen the four bolts that retain the 183-4938 Bearing blocks. Replace the 8T-4189 Bolts on the LHS mount with 8T-4908 Bolts. Introduce a combination of 204-0751 and 219-7627 Shims under the bearing blocks on both sides, up to a maximum of 4mm, to lift the assembly and introduce clearance between the cross bar and the valve bracket. See Image 1.4.1 below:

Image1.4.1

7.Re-tighten the bearing block mounting bolts to a torque of 28 +/- 7Nm.

8.Adjust the position of the two latch assemblies on the LH mount such that the control assembly structure latches securely into the storage and working positions, without any free play. Retighten the 6 latch bolts to 12 +/- 3Nm. Note: the latch control rods will need to be lengthened to allow both latches to work properly, once their positions have been adjusted. When lengthening the control rods, ensure that the control lever sits centrally in the guide slot, when in the neutral position.

9.Check for correct operation of the control pod assembly. Ensure that the structure latches firmly into the storage and working positions.

10.Re-assemble the pod covers, the floorplate, and floormat. Refer to Disassembly and Assembly Manual, RENR6485, "Bank Valve (Backhoe) ? Install" Steps 13 and 14.