END-BEARING ROD 6V1033 - Caterpillar

Caterpillar: Confidential Yellow
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 Caterpillar product analyst.
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 "PS5384" 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.
This Revised Service Letter replaces the December 11, 1997 Service Letter. Changes have been made to the Parts Needed.
Termination Date
December 31, 1998Problem
Certain 3116 and 3126 HEUI Truck Engines may have a high pitched squeal or chirp while operating under heavy load and high oil temperature.
Affected Product
Model & Identification Number
Group 1
3116 (8WL1-Up)
Group 2
3126 (1WM1-Up 4ES1-Up )
Parts Needed
Group 1
1 - 1R0739 Filter6 - 0335853 O-Ring6 - 1136303 O-Ring6 - 1480876 Tuned Fitting6 - 1492716 Orificed Jumper TubeGroup 2
1 - 1R0739 Filter6 - 0335853 O-Ring6 - 1136303 O-Ring6 - 1480876 Tuned Fitting6 - 1488047 Orificed Jumper TubeAction Required
See the attached rework procedure.
Service Claim Allowances
An additional 1.6 hours may be claimed using SMCS Code 1714-500 if required when the rework is performed in a Motor Home, cab type (RV) or Bus (BU).
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
1. Check to see if the dipstick has been re-calibrated using a scribe pencil.2. Re-calibrate the oil level gauge (dipstick) before installing new jumper tubes. See the attached pages entitled "3100 HEUI Oil Level Correction". Check the engine to see if this corrects the squeal.3. Remove jumper tubes and tuned fittings from intake manifold. Use a new 1480876 Tuned Fitting and 1492716 Jumper Tube for Group 1 and a 1480876 Tuned Fitted and 1488047 Jumper Tube for Group 2.4. Install the 1480876 Tuned Fitting into the manifold and tighten to a torque of 25 3 N m (18 2 lb ft).5. Install the 1492716 or the 1488047 Tube Assembly into the manifold end first, then the injector end. Start