The Connecting Rod Bearings Need To Be Replaced In Certain G3606, G3608, G3612, And G3616 Engines Caterpillar

The Connecting Rod Bearings Need To Be Replaced In Certain G3606, G3608, G3612, And G3616 Engines

Usage:

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Caterpillar: Confidential Yellow

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI30027" 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 "PI30027" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

Completion Date

November 30, 2000

Termination Date

May 31, 2001

Problem

The 157-2156 Connecting Rod Bearings may fail and need to be replaced with the 101-4181 Connecting Rod Bearings.

Affected Product
Model & Identification Number

G3606 ( 3XF211-235)

G3608 ( 4WF134-155)

G3612 ( 1YG177-187, 1YG189, 1YG191)

G3616 ( 4CG146-171)

Parts Needed

1^* - 101-4181 Connecting Rod Bearing

4^* - 6V9801 Nut

^*Quantities listed are per cylinder.

Action Required

Parts Stock

Remove all 157-2156 Connecting Rod Bearings from Parts Stock

Affected Product

See the attached rework procedure.

Owner Notification

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

Service Claim Allowances

Parts Stock

Submit one claim for all 157-2156 Connecting Rod Bearings removed from Parts Stock

Affected Product

Parts Disposition

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

Attach.

(1-Owner Notification)

(2-Rework Procedure)

Copy Of Owner Notification For U.S. And Canadian Owners

Rework Procedure

Replace the 157-2156 Connecting Rod Bearings on the serial numbers listed above with the 101-4181 Connecting Rod Bearings. Install new 6V9801 Nuts during re-assembly of the connecting rods. Refer to August 1997 Engine News Article for torquing instructions.

The procedures below should be performed on the new 101-4181 Connecting Rod Bearings before installation.

Record the date code on the 101-4181 Connecting Rod Bearing and forward this to Rick Parrish at PARRIRL@CAT.COM.In addition, please return any 157-2156 connecting rod bearing that was found to have rotated, to Lafayette. The address is:

Caterpillar, Inc.
Attn: Claims Room / Rick Parrish
3701 State Route 26
Lafayette, IN

Tin Flashing Removal Procedure

* Removal of the tin flashing from the back of the 101-4181 bearing will increase friction between the bearing and connecting rod.

* Note only the 101-4181 bearing should be used.

* Attention should be given to proper handling procedures for tin.

* The back of the bearing has what appears to be a dull gray/white appearance. Lightly buff the back of the bearing using Type A Medium Scotch Brite pad. Buff the bearing from end to end - not side to side. The dull gray/white appearance will change to a silver. Refer to attachd photos.

NOTE: Use only Type A Medium Scotch Brite pad. Use of other materials such as emery cloth will remove steel backing which will reduce crush.

Illustration 1. Bearing Buffing