DIFFERENTIAL & BEVEL GEAR GP 1V3304 - 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.
Mail Code U-108 was used on both the July 21, 1994 and the July 22, 1994 Service Letters.When filing your Service Letters, make sure both letters are accounted for.
This Revised Service Letter replaces the July 22, 1994 Service Letter. Changes have been made to explain Mail Code U-108.
Termination Date
October 31, 1994Problem
Certain water pumps in Parts Stock for use on 3300 and 3400 Engines need to have the coolant seal groups replaced. Certain water pump coolant seal groups need to be removed from Parts Stock.
Action Required
Remove all 106-7150 Seals (Chg 01) from Parts Stock.
It is not necessary to remove any of the former 106-7150 Seals manufactured to Change 00. 106-7150 Seals manufactured to Change 00 can be used for this rework.
Inspect the following water pumps in Parts Stock for a date code of 2-94 through 5-94 (NMDR, NEDR, DRDR, and NADR). The date code should be located next to the part number.
If the water pumps have one of these date codes, refer to Special Instruction SEHS8449 or the system operation, test and adjust section of the Service Manual to change the coolant seal.
Remove the impeller and the rotating portion of the existing coolant Seal (Chg 01). Leave the stationary portion of the coolant seal in place to simplify the repair. Install the rotating portion of the new 118-9163 Coolant Seal. After lubricating the shaft with clean water or coolant, use the 2W9102 Installation Tool to push the rotating portion of the seal onto the shaft. Install the spring and impeller. Tighten the impeller bolt to a torque of 39 3 N m (28 ft. lb.).
The rotating portion of a the former 106-7150 Chg 00 Coolant Seal can also be used if there are any in dealer Parts Stock. Reuse the spring from the Parts Stock water pump if a 106-7150 Chg2000 Coolant Seal is used.
Service Claim Allowances
Submit one claim for all water pumps from Parts Stock that were reworked and for all 106-7150 (Chg 01) Seals that were removed from Parts Stock. Claim .3 hours of labor the dealer cost rate for each water pump reworked.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.