BELT-SERPENTINE 2631849 - Caterpillar

Introduction
The specifications given in this book are on the basis of information available at the time the book was written. These specifications give the torques, operating pressure, measurements of new parts, adjustments and other items that will affect the service of the product.When the words "use again" are in the description, the specification given can be used to determine if a part can be used again. If the part is equal to or within the specification given, use the part again.When the word "permissible" is in the description, the specification given is the "maximum or minimum" tolerance permitted before adjustment, repair and/or new parts are needed.A comparison can be made between the measurements of a worn part, and the specifications of a new part to find the amount of wear. A part that is worn can be safe to use if an estimate of the remainder of its service life is good. If a short service life is expected, replace the part. The specifications given for "use again" and "permissible" are intended for guidance only and Caterpillar Tractor Co. hereby expressly denies and excludes any representation, warranty or implied warranty of the reuse of any component. This engine uses bolts (3/8 inch size only) with washer heads in some locations. The washer head bolt does not need a plain washer, lockwasher or lockplate. Where these bolts are used on aluminum covers or housings, a plain washer is needed. If you are not sure a washer is used under a bolt head, use the Parts Book to see if a washer is needed.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. Contactor Switch for Overspeed Fails to Activate Shutoff Solenoid.5. Contactor Switch for Overspeed Activates Shutoff Solenoid at Wrong Speed.6. Shutoff Solenoid Fails to Stop Engine.7. Shutoff Solenoid Prevents Engine Start.8. Clutch Will Not Engage (Slips), Heats or Lever Moves to Released Position.9. Clutch Shaft Has Too Much End Play.10. Clutch Bearings Have Short Service Life.11. Mechanical Shutoff Fails To Stop Engine Because Of Low Oil Pressure.12. Mechanical Shutoff Does Not Stop Engine When Coolant Temperature Is Too High.13. Mechanical Shutoff Will Not Let Engine Start.14. Electrical Gauges Give Wrong Readings.15. 2301 Nonparallel Control System.