CORD AS-HEATER ELEMENT 7X6312 - Caterpillar

Introduction
For Specifications with illustrations, make reference to SPECIFICATIONS for 3408 & 3408B INDUSTRIAL AND MARINE ENGINE ATTACHMENTS, Form No. SENR7725. If the Specifications in Form SENR7725 are not the same as in the Systems Operation and the Testing and Adjusting, look at the printing date on the back cover of each book. Use the Specifications given in the book with the latest date.Troubleshooting
Troubleshooting can be difficult. On the following pages there is a list of possible problems. To make a repair to a problem, make reference to the cause and correction.This list of problems, causes and corrections will only give an indication of where a possible problem can be, and what repairs are needed. Normally, more or other repair work is needed beyond the recommendations in the list. Remember that a problem is not normally caused only by one part, but by the relation of one part with other parts. This list can not give all possible problems and corrections. The serviceman must find the problem and its source, then make the necessary repairs.1. Contactor Switch for Water Temperature Does Not Activate Shutoff Solenoid.2. Contactor Switch for Water Temperature Activates Shutoff Solenoid at Wrong Temperature.3. Contactor Switch for Oil Pressure Fails to Activate Shutoff Solenoid.4. Shutoff Solenoid Fails to Stop Engine.5. Shutoff Solenoid Prevents Engine Start.6. Clutch Will Not Engage (Slips), Heats or Lever Moves to Released Position.7. Clutch Shaft Has Too Much End Play.8. Clutch Bearings Have Short Service Life.9. Mechanical Shutoff Fails To Stop Engine Because Of Low Oil Pressure.10. Mechanical Shutoff Does Not Stop Engine When Coolant Temperature Is Too High.11. Mechanical Shutoff Will Not Let Engine Start.12. Electrical Gauges Give Wrong Readings.13. Contactor Switch for Overspeed Fails to Activate Shutoff Solenoid.14. Contactor Switch for Overspeed Activates Shutoff Solenoid at Wrong Speed.15. PSG Governors. a. Engine Speed Does Not Have Stability.b. Vibration At Governor Output Shaft.c. Fuel Control Response When The Engine Is Started Is Not Acceptable.d. Engine Has Slow Response To A Change In Speed Setting Or Load.e. No Output From Governor.f. Engine Will Not Drive Full Rated Load.g. Load Sharing Between Paralleled Units Is Not Correct (One unit on zero droop all others on droop).h. Load Sharing Between Paralleled Units Is Not Correct (all units on droop).16. Automatic Start/Stop Systems.CONTACTOR SWITCH FOR WATER TEMPERATURE DOES NOT ACTIVATE SHUTOFF SOLENOID CONTACTOR SWITCH FOR WATER TEMPERATURE ACTIVATES SHUTOFF SOLENOID AT WRONG TEMPERATURE CONTACTOR SWITCH FOR OIL PRESSURE FAILS TO ACTIVATE SHUTOFF SOLENOID SHUTOFF SOLENOID FAILS TO STOP ENGINE SHUTOFF SOLENOID PREVENTS ENGINE START CLUTCH WILL NOT ENGAGE (SLIPS), HEATS OR LEVER MOVES TO RELEASED POSITION CLUTCH SHAFT HAS TOO MUCH END PLAY CLUTCH BEARINGS HAVE SHORT SERVICE LIFE MECHANICAL SHUTOFF FAILS TO STOP ENGINE BECAUSE OF LOW OIL PRESSURE MECHANICAL SHUTOFF DOES NOT STOP ENGINE WHEN COOLANT TEMPERATURE IS TOO HIGH MECHANICAL SHUTOFF WILL NOT LET ENGINE START ELECTRICAL GAUGES GIVE WRONG READINGS CONTACTOR SWITCH FOR OVERSPEED FAILS TO ACTIVATE SHUTOFF SOLENOID CONTACTOR SWITCH FOR OVERSPEED ACTIVATES SHUTOFF SOLENOID AT WRONG SPEED ENGINE SPEED DOES