Checking Coolant Contactor Accuracy
Usage:
In many applications, the accuracy of the temperature contactor used in an alarm or shutoff system is very important. To accurately check the actuation temperature of a contactor, do not use a static water bath. Actuation temperature will be 10°C (18°F) or above the actual actuation point when the contactor is installed in an engine. Even using an agitated glycol bath can produce a 3 to 5°C (5 to 9°F) error.
In order to provide a rate of coolant flow high enough to insure accuracy, contactors should be checked in a running engine in a location with good coolant flow. Refer to the test procedure described in the reference.
Caterpillar Information System:
1987/05/01 Maintaining Coolant Water Temperature Contactor Accuracy
1987/05/01 Polarity Connections And Use Of Service Meter Films When Service Meter Kits Are Installed
1987/05/01 Two New Self-Powered Digital Tachometers And Signal Generator Available
1987/05/01 Material Changed In Exhaust and Inlet Valves
1987/05/01 New Precombustion Chamber Seal Available
1987/05/01 Black Light Leak Detection Kit Available For Oil, Fuel and Cooling Systems
1987/05/01 Classifications For Marine Engine Ratings
1987/05/01 Enhancements Available For Marine PAR Program
1987/04/01 Cooling System Conditioner
1987/04/01 Dispenser Available For Shop Towels
1987/04/01 Stop Engine If There Is A Turbocharger Bearing Failure
1987/04/01 Oversize Piston Ring Seal Available For Clutch Group
1987/05/01 Service Parts Available For Air-Regulated 8T5190 Wrench Group
1987/05/01 New Service Tools Available
1987/05/01 Initial Start Of Engine Using An EGB29P Governor/Actuator After Filling With Oil
1987/05/01 Testing The Starter On The Engine
1987/05/01 The Caterpillar Fuel Flow Monitor System Available
1987/05/01 Serviceable Parts For New Fuel Ratio Control; Pressurize Control To Set Rack
1987/05/01 Alternator/Generator Output Test On The Engine
1987/05/01 Fuel Injection Timing Adjustment
1987/05/01 Horizontally Mounted Jacket Water Heater Now Used
1987/05/01 Improved Fuel Priming Pump Used
1987/05/01 List of Service Publications
1987/06/01 Features And Servicing Of The Various Caterpillar 3161 Governors