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THROTTLE POSITION SENSOR NEEDS TO BE CHECKED ON CERTAIN 3406B PEEC ENGINES - MAILED US, CANADA, TRUCK TEPS
  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.
U-46 TT-2 PRIORITY parts stock action needed 1265 PI3274 COMPLETION DATE Termination Date
September 30, 1988 March 31, 1989
Problem
Some 7T5596 Control Groups (throttle position sensors) which are used on 3406B PEEC Engines were assembled using a snap ring that was too small. If the snap ring moves out of position, it could result in a malfunction of the sensors.
Affected Product
Model Identification Number 3406B PEEC 8TC976 - 1500
Parts Needed
Dealers will need to order parts for this Program. 1 - 7T5596 Control Group
Action Required
Parts Stock Check all 7T5596 Control Groups in parts stock. Control groups with a serial number of Cat 1000 - Up are good. Control groups with a serial number below Cat 1000 must be purged from parts stock. The serial number is on the end of the control group below the part number. Affected Product Check the 7T5596 Control Group which is located on the truck cab. The serial number is on the end of the control group below the part number. If the control group has a serial number of Cat 1000 - Up, they are good and no further action is required. If the control group has a serial number below Cat 1000, they must be replaced. Install a new control group.
Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
Submit one claim for all 7T5596 Control Groups removed from parts stock. Caterpillar Dealer Suggested Customer Suggested Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. (C/L) (Sell) (C/L) (Sell) Inspection - 1 0 0 0 0 Replacement 100% 3 0 0 0 0 This is a 1-hour job for inspection and a 3-hour job for removal and installation.
Parts Disposition
Return all 7T5596 Control Groups and a copy of the claim to: Caterpillar Inc. Attn: Supplier Recovery Supervisor Warehouse #4 Docks 5 thru 9 8201 N. University Peoria, IL 61615 MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE. Attach. (1-Owner Notification) COPY OF
Owner Notification
FOR U.S. AND CANADIAN OWNERS XYZ Corporation 3240 Arrow Drive Anywhere, YZ 99999 PRIORITY - Throttle Position Sensor Needs To Be Inspected MODELS INVOLVED - 3406B PEEC Engines Dear Caterpillar Product Owner: Some throttle position sensors which are used on the products listed below may have been assembled using a snap ring that is too small. If the sensor has a snap ring that is too small, the result could be a malfunction of the sensors. The throttle position sensors needs to be inspected and possibly replaced. The repair will be done at no cost to you. Contact your local Caterpillar dealer immediately and schedule a time to have this service performed. The time for the inspection is approximately one hour, and replacement if necessary will take approximately three hours. We regret the inconvenience this may cause you, but urge you to have this service performed as soon as possible to prevent unscheduled downtime. Caterpillar Identification #(s) Attached to March 21, 1988 Service Letter