KIT-SEAL 2342593 - Caterpillar

All 3600 Diesel EnginesIntroduction
To reduce dealer inventory, common service replacement temperature contactors have replaced the original equipment temperature contactors. The service replacement temperature contactors are preset to a standard setting. This setting must be calibrated to the correct operating temperature range for its application (refer to Chart A for temperature ranges).This Special Instruction includes the procedure to test and calibrate the temperature range of the contactor to specific actuation and deactuation temperature settings.It is also recommended that each contactor be checked for correct calibration and recalibrated as necessary. Refer to Chart A for a listing of all temperature contactors used on 3600 Diesel Engines and the specified service replacement contactor part number. The 7C-4927, 4W-2647, 7C-3888, and 7C-4926 Temperature Contactors have a 3 m (9.8 ft) long capillary tube; the 121-0031, 121-0032, and 121-0033 Temperature Contactors have a 5 m (16.4 ft) long capillary tube; and the 4P-6038, 121-0034, and 122-5972 Temperature Contractors have an 8 m (26.0 ft) long capillary tube. When ordering a replacement temperature contactor, be sure to order the part number of the service replacement temperature contactor listed in Chart A and not the part number of the temperature contactor being replaced. This ensures receiving the correct service replacement part.Do not perform any procedure, outlined in this publication, or order any parts until you have read and understood the information contained within this Special Instruction.Reference: Refer to Special Instruction SEHS7734, "Use of 6V-7070 Heavy-Duty Digital Multimeter and 6V-7800 Regular-Duty Digital Multimeter" for instruction on using the multimeter.Follow the manufacturer's instructions on the use and care of heat baths. Required Equipment
The following is a list of equipment required to test and calibrate temperature contactors.* 6V-7070 Multimeter or Equivalent A multimeter is used to verify the actuation and deactuation settings. This is done by checking for continuity between two terminals inside the contactor.* Heat Bath A heat bath is used to maintain a constant elevated temperature with the temperature probe submersed into a silicone heating fluid. This allows for the calibration of the actuation and deactuation settings. It must be temperature controlled and meet the following specifications:a. Capable of obtaining a temperature of 150° C (302° F) or have at least a 20° C (40° F) higher temperature capacity than the specified set point.b. Maintain the temperature within 1° C ( 2° F) maximum temperature difference.c. Must be equipped with a thermometer or digital display temperature read-out accurate to within 0.5° C ( 1° F).d. Circulate the heating fluid to maintain a uniform temperature.e. Must have a minimum bath capacity of 0.5 L (31.25 cu in). Also requires a working depth large enough to fully immerse the temperature probe.f. Must be compatible with silicone fluids.g. Can be a portable self-contained unit. The heat baths listed in Chart B meet the specified requirements and can be purchased from:Cole-Parmer Instruments Co.
7425 North Oakpark Ave.
Niles, IL, 60714 U.S.A.
Phone (800) 323-4340
Fax: (708) 647-9660
* Heat Bath Fluid The heat bath fluid must be able to obtain and maintain the