PRODUCT IMPROVEMENT PROGRAM FOR RELOCATING THE BOOM ACCUMULATORS ON CERTAIN M325C MH AND M325D MH EXCAVATORS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR RELOCATING THE BOOM ACCUMULATORS ON CERTAIN M325C MH AND M325D MH EXCAVATORS [REBE1051]

HYDRAULIC SYSTEM

ACCUMULATOR GP

PRODUCT IMPROVEMENT PROGRAM FOR RELOCATING THE BOOM ACCUMULATORS ON CERTAIN M325C MH AND M325D MH EXCAVATORS

REBE1051-01

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07Sep2006

(Revised 29Jan2007)

U-619

A-603

O-599

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR RELOAVSING THE BOOM ACCUMULATORS ON CERTAIN M325C MH AND M325D MH EXCAVATORS
5057 5077		PI31144

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31144" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI31144" as the Part Number, "7751" as the Group Number, "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 AVSpare product analyst.

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NOTE:	This Revised Service Letter replaces the September 7th, 2006 Service Letter. Changes have been made to the Affected Product and Rework Procedure.

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COMPLETION DATE	TERMINATION DATE
31Mar2007	30Sep2007

PROBLEM

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The mounting bracket for the boom accumulator may develop cracks in high load applications on certain M325C MH and M325D MH Excavators. If the mounting bracket cracks and fails, the accumulators can fall, possibly causing damage to the cab.

AFFECTED PRODUCT

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Model	Identification Number
*****Group 1*****
M325C MH	PAN00242-00257, 259-275, 278-290, 293, 295, 297-312, 315-334, 336-343

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*****Group 2*****
M325C MH	XJA00202-00292
M325D MH	EDF00223, 230, 232

PARTS NEEDED

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Qty	Part Number	Description
*****Group 1*****
12	1053482	BOLT-HEX SOCKET
4	2871830	PLATE AS
2	2872969	HOSE AS.
4	2880857	CLAMP
1	3J1907	SEAL-O-RING
2	3J7354	SEAL-O-RING
5	6V8397	SEAL-O-RING
1	6V8724	ELBOW-FACE SEAL
2	6V9200	ELBOW-FACE SEAL
1	6V9850	ELBOW-SWIVEL
*****Group 2*****
12	1053482	BOLT-HEX SOCKET
4	2871830	PLATE AS
2	2872969	HOSE AS.
4	2880856	CLAMP
1	3J1907	SEAL-O-RING
2	3J7354	SEAL-O-RING
5	6V8397	SEAL-O-RING
1	6V8724	ELBOW-FACE SEAL
2	6V9200	ELBOW-FACE SEAL
1	6V9850	ELBOW-SWIVEL

ACTION REQUIRED

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Refer to the attached Rework Procedure.

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OWNER NOTIFIAVSION

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U.S. and Canadian owners will receive the attached Owner Notification.

SERVICE CLAIM ALLOWANCES

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AVSpare		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 1.0-hour job for Group 1

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AVSpare		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 1.0-hour job for Group 2

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PARTS DISPOSITION

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

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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COPY OF OWNER NOTIFIAVSION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR RELOAVSING THE BOOM ACCUMULATORS ON CERTAIN M325C MH AND M325D MH EXCAVATORS

MODELS INVOLVED - CERTAIN M325C MH AND M325D MH EXCAVATORS

Dear AVSpare Product Owner:

New fixation system of boom accumulators need to be installed on the products listed below. Rework consists of relocating accumulators on boom cylinders with new clamps and brackets.You will not be charged for the service performed.

Contact your local AVSpare dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.

Please refer the dealer to their Service Letter dated 07Sep2006 when scheduling this service.

We regret the inconvenience this may cause you, but urge you to have this service performed as soon as possible to prevent unscheduled downtime.

AVSpare Inc.

Identification #(s)

Attached to 07Sep2006 Service Letter

Rework Procedure

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Group Number 1

Notice

Image1.1.1

Position front parts on the ground and untighten screw on 232-7304 block (A on Fig 1.2.1 & 1.2.2) to release pressure in boom cylinders

Disconnect accumulators (remove 229-9686 (B) and 233-9621 (C) hoses) and replace 148-8435 Tee as.(D) by 148-8378 elbow as. (6V-8724 Elbow, 6V-8397 Seal & 3J-1907 Seal) between balancing line and block 232-7304 (torque: 24+3 Nm) (A)

Image1.2.1

Image1.2.2

Relocate accumulators on boom cylinders (using 287-1830 plate, 105-3482 bolts (torque:28+-7 Nm) (A & B on Fig 1.3.1) and 288-0857 clamp (torque: 16+-1 Nm); refer to (C) on figure 1.3.1 for approximate positioning) and connect on BLCV side port (external side, do not change current 1mm orifice, connect to free port just opposite side to balancing line port, refer to fig1.3.2) using 287-2969 hoses (D) and 148-8367 Elbow as. (6V-9850 Elbow &6V-8397 Seal). Connection between hose and accumulators grop can be done with 148-8361 Elbow as. (6V-9200 Elbow, 6V-8397 Seal & 3J-7354 Seal). Adjust accumulators position to get correct hose routing. Attention to correctly position accumulators in vertical plane to avoid contact with boom or cab.

Check the hydraulic system oil level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".

Image1.3.1

Image1.3.2

Group Number 2

Notice

Image2.1.1

Position front parts on the ground and untighten screw on 232-7304 block (A on Fig 2.2.1 & 2.2.2) to release pressure in boom cylinders

Disconnect accumulators (remove 229-9686 (B) and 233-9621 (C) hoses) and replace 148-8435 Tee as.(D) by 148-8378 elbow as.(6V-8724 Elbow, 6V-8397 Seal & 3J-1907 Seal) between balancing line and block 232-7304 (torque: 24+3 Nm) (A)

Image2.2.1

Image2.2.2

Relocate accumulators on boom cylinders (using 287-1830 plate, 105-3482 bolts (torque:28+-7 Nm) (A & B on Fig 2.3.1) and 288-0856 clamp (torque: 16+-1 Nm); refer to (C) on figure 2.3.1 for approximate positioning) and connect on BLCV side port (external side, do not change current 1mm orifice, connect to free port just opposite side to balancing line port, refer to fig2.3.2) using 287-2969 hoses (D) and 148-8367 Elbow as. (6V-9850 Elbow & 6V-8397 Seal). Connection between hose and accumulators grop can be done with 148-8361 Elbow as. (6V-9200 Elbow, 6V-8397 Seal & 3J-7354 Seal). Adjust accumulators position to get correct hose routing. Attention to correctly position accumulators in vertical plane to avoid contact with boom or cab.

Check the hydraulic system oil level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check.