COOLER AS-FUEL 3195401 - Caterpillar

The following data is presented as an aid to locating the source of difficulty in a malfunctioning unit. It is necessary to consider pressure delivered by the differential lock system and connecting lines when running down the source of trouble since the proper operation of any unit therein depends greatly on the condition and operations of the others. By studying the principles of operation together with data in this section, it may be possible to correct any malfunction which may occur in the system.TROUBLE SHOOTING PROCEDURE BASICALLY CONSISTS OF TWO CLASSIFICATIONS: MECHANICAL AND HYDRAULIC.Mechanical Checks
Prior to checking any part of the system from a hydraulic standpoint, the following mechanical checks should be made: 1. A check should be made to be sure all control lever linkage is properly connected and adjusted at all connecting points.2. Check control levers and rods for binding or restrictions in travel that would prevent full engagement. Shift levers by hand at control valve; if full engagement cannot be obtained, difficulty may be in control valve assembly.Hydraulic Check
Before checking hydraulic system for pressures and rates of oil flow, it is essential that the following preliminary check be made:Check oil level in the rear axle. This should be done with oil temperatures of 180 to 200°F. (82, 2-93, 3°C). DO NOT ATTEMPT THIS CHECK WITH COLD OIL!!