What is Brake Cylinder Overstroke

Brake Cylinder Overstroke Switch IllustrationThe overstroke switch is closed to ground during normal operation. The switch circuit opens when one of the brake cylinders reach the overstroke switch. The open switch informs the ECM of the overstroke....

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How to maintenance Air Dryer

AIR DRYER FOR VEHICLE AIR SYSTEMSMaintenanceNOTE: The check for water may be made at 250 service hours but it is not expected that maintenance of the desiccant will be required for at least 1000 service hours.Put a new or rebuilt desiccant cartridge in the air dryer when the desiccant in the cartridge does not have enough water absorption ability. First, make the checks that follow.1. Check for water in the air tanks. Open the...

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How to Jumper Battery

Engine Starting with Jump Start Cables------ WARNING! ------Batteries give off flammable fumes that can explode resulting in personal injury.Prevent sparks near the batteries. They could cause vapors to explode. Do not allow the jump start cable ends to contact each other or the machine.Do not smoke when checking battery electrolyte levels.Electrolyte is an acid and can cause personal injury if it contacts skin or eyes.Always...

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How if the Exhaust Temperature is to High

Exhaust Temperature Is Too HighProbable Causes * Diagnostic codes * Air inlet and exhaust system * Air leakRecommended ActionsDiagnostic CodesConnect Caterpillar Electronic Technician (ET) in order to determine if any diagnostic codes for the injector solenoids are present. Check that the injector trim codes have been entered. Perform the "Injector Solenoid Test". Observe that the injector solenoids are being energized on...

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Troubleshooting Boost Pressure Below Normal

Boost Pressure Below Normal The probable root causes are listed below: Air inlet restrictions Fuel supply Injector solenoid Wastegate Engine speed/timing signal Low fueling rate Active engine derate Intermittent sensor problem Perform the following checks: Check for restrictions in the air inlet system. Refer to Systems Operation, "Restriction of Air Inlet and Exhaust". Check fuel lines for the following problems:...

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Air Inlet and Exhaust System Operation

Air Inlet and Exhaust System OperationThe components of the air inlet and exhaust system control the quality and the amount of air that is available for combustion. There are separate turbochargers and exhaust manifolds on each side of the engine. An aftercooler is located between the cylinder heads in the center of the engine. The inlet manifold is a series of elbows that connect the aftercooler chamber to the inlet ports (passages)...

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CAT-Applied Failure Analysis OIL and your engine part 2

Diesel Engine Oil Recommendations Caterpillar Diesel Engine OilCaterpillar Oils have been developed and tested to provide the full performance and service life that has been designed and built into Caterpillar Engines. Caterpillar Oils are currently used to fill diesel engines at the factory. These oils are offered by Caterpillar dealers...

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CAT-Applied Failure Analysis OIL and your engine

Applied Failure AnalysisOIL and your engineBearing failure, piston ring sticking, and excessive oil consumption are classic symptoms of oil-related engine failure. How do you avoid them? There are numerous ways, three of the most important being Scheduled Oil Sampling (S·O·S SM), regular maintenance of the lubrication system, and the use of correct lubricants. Following these recommendations can mean the difference between experiencing...

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How to the Contamination Control at CAT machine

Caterpillar Machine Fluids Recommendations Contamination ControlDefining ContaminationContaminants are any substance in the system that is not intended to be in the system. Contamination is the wear particles, water, fibers, dirt, dust, or products of combustion that are suspended in the oil or the fuel. The size of these particles is much smaller than the size of a human hair. A human hair is 80 microns in diameter....

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What the action if the panel shown Intermittent Engine Shutdown

Intermittent Engine ShutdownNote: Use this procedure only if the engine shuts down completely during operation.Probable Causes * Diagnostic codes * Event codes * Electrical connectors * Air inlet and exhaust restrictions * Circuit breakers * Fuel supplyRecommended ActionsDiagnostic Codes and/or Event CodesCertain diagnostic codes and/or event codes may cause an engine shutdown. Connect the Caterpillar Electronic...

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Troubleshooting-Vital Information Management System (VIMS)

Troubleshooting784C, 785B, 785C, 789B, 789C, 793B, 793C, 793D, 797 and 797B Off-Highway Truck/Tractors Vital Information Management System (VIMS)General InformationTroubleshooting the Vital Information Management System requires additional information from the machine Service Manual, the Electrical System Schematic, and the Operation and Maintenance Manual.As a guide, a "VIMS schematic" is provided in the Testing and Adjusting...

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CAT-Belts - Inspect/Adjust/Replace

Belts - Inspect/Adjust/Replace784C and 785C Off-Highway Truck/TractorInspectionTo maximize the engine performance, inspect the belt for wear and for cracking. Check the belt tension. Adjust the belt tension in order to minimize belt slippage. Belt...

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