General Information
Often when problems with the charging system are being investigated, the alternator is not the problem. If a low battery condition is present test the batteries first. See Special Instruction, SEHS7633, "Battery Test Procedure" for more information. If the engine cranks slowly, then test the starting system. See Service Magazine, SEPD0020, "Testing The Starter On The Engine" for more information. When a problem with the charging system is suspected, then complete the testing that is outlined in this manual. See Testing and Adjusting, "Initial Troubleshooting Procedure" in order to begin troubleshooting. The procedures in this section are designed to guide you to the problem with as little testing as possible. In most cases, you will only use a few of the tests to diagnose a problem. The tests are labelled as T1 - T8 for easy reference. A descriptive title for each test is included as well.
Caterpillar Information System:
784C, 785C, 785D, 789C, 789D, 793C and 793D Off-Highway Trucks Power Train Electronic Control System Solenoid Valves
3406E and 3456 Engines for Caterpillar Built Machines Engine Oil Cooler - Remove
784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Air Control Valve (Retarder)
784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Brake Valve (Parking and Secondary)
784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Air Control Valve (Parking Brake)
784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Air Control Valve (Secondary Brake)
583R Pipelayer Power Train Torque Converter Outlet Relief Valve - Assemble
784C, 785C, 785D, 789C, 789D, 793C and 793D Off-Highway Trucks Power Train Electronic Control System Load Counter Function
784C and 785C Off-Highway Trucks Machine Systems Air/Hydraulic Cylinder (Front Brake) - Remove
784C, 785C, 785D, 789C, 789D, 793C and 793D Off-Highway Trucks Power Train Electronic Control System Prelubrication Function
784C, 785C and 785C HAA Off-Highway Truck/Tractors Hydraulic System Relief Valve (Hoist Dual Stage)
950G Wheel Loader, 962G Wheel Loader and IT62G Integrated Toolcarrier Hydraulic System Ride Control Accumulator - Test and Charge
583R Pipelayer Power Train Torque Divider - Remove
Caterpillar<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> AP-1050B and Barber-Greene<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> BG-245C Asphalt Pavers Auxiliary System Hydraulic Cylinder (Hopper Hoist)
AP-1055B and BG-2455C Asphalt Pavers Auxiliary System Hydraulic Cylinder (Tow Point)
AP-1055B and BG-2455C Asphalt Pavers Auxiliary System Hydraulic Cylinder (Auger Hoist)
3408E and 3412E Industrial Engines Crankshaft
583R Pipelayer Power Train Torque Divider - Disassemble
Caterpillar<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> AP-1050B and Barber-Greene<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> BG-245C Asphalt Pavers Auxiliary System Hydraulic Cylinder (Screed Hoist)
Caterpillar<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> AP-1050B andBarber-Greene<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> BG-245C Asphalt Pavers Propel System Hydraulic Cylinder (Throttle Control)
Caterpillar<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> AP-1050B and Barber-Greene<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> BG-245C Asphalt Pavers Auxiliary System Flow Control Valve (Ventilation System)
Caterpillar<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> AP-1050B and Barber-Greene<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> BG-245C Asphalt Pavers Auxiliary System Gear Motor (Ventilation System)
69D and 769D Off-Highway Trucks and 771D Quarry Truck Turbocharger Manifold - Remove and Install
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Power Train Differential Steering System Power Flow