Remanufacturing Water Pumps For The 3300 Family Of Engines Caterpillar

Problem:

Some remanufactured water pumps for these engines may have been assembled with insufficient torque on the bolt (2) that fastens the impeller (1) to the shaft (3). As a result the impeller may come loose during operation. Prolonged operation can cause the bolt to act as a "forcing screw", pressing the shaft and bearing out of the water pump housing.

Solution:

Check the Date Code on the shipping cartons for 0R-0796, 0R-0797, 0R-8348, 0R-8349, 0R-8350, 0R-8351, 0R-8352 and 0R-8354 Remanufactured Water Pump Groups. Use a torque wrench to check the torque on bolt (2) in the remanufactured water pump groups with Date Codes prior to 6 June 1997. To check the torque on bolt (2), secure the water pump drive gear to prevent the shaft (3) from turning. The correct torque for bolt (2) is 48 ± 8 N·m (35 ± 6 lb ft).

NOTE: The Date Code is formatted as DDMMYYXXX. DD = the day of the month. MM = the month of the year. YY = the year. XXX = plant number. For example, the Date Code 180697068 indicates a water pump manufactured on 18 June, 1997, at plant number 068.

Please share this information with your TEPS Dealers.

Typical Water Pump Group For The 3300 Family Of Engines

Impeller (1), Bolt (2), Shaft (3)

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