HOSE AS 2D8928 - Caterpillar

Introduction
Troubleshooting can be difficult. To make a repair to a problem, refer to the possible cause and the corrective action. Also, refer to Electronic Troubleshooting for 3406E and 3456.This list of problems, causes and corrections will only give an indication of the location of a possible problem. This will also list the type of repairs that are needed.Service personnel may remember similar complaints which were corrected by a previous method of troubleshooting. A similar complaint can have a different cause.Get a good description of the problem from the operator and/or the person that owns the vehicle. Knowing the details of the problem can save time. This will make the repair job faster and easier.Troubleshooting Problems
Combustion Noise
Probable Cause
Poor Quality Or Water In The Fuel - Refer to Special Instruction, SEHS7067, "Fuel Recommendations For Caterpillar Diesel Engines". Also, Special Instruction, SEHS6947 has fuel correction factors and tables.The Wrong Timing Position Sensor Calibration - Refer to Electronic Troubleshooting for 3406E and 3456.Fuel Consumption Too High
Probable Cause
Poor Quality Or Water In The Fuel - Refer to Special Instructions, SEHS7067, "Fuel Recommendations For Caterpillar Diesel Engines". Also, Special Instruction, SEHS6947 has fuel correction factors and tables.Fuel System Leaks - Inspect the fuel system for leaks. As needed, make repairs or replacements.Excess Idle Time - The engine should be shut off when the engine is not active.Fuel And Combustion Noise (knock) - Refer to Electronic Troubleshooting for 3406E and 3456.Wrong Timing Position Sensor Calibration - Refer to Electronic Troubleshooting for 3406E and 3456.Excessive Black Smoke
Probable Cause
Not Enough Air For Combustion - Check for a plugged air cleaner element or for blockage in the air lines. Refer to Testing And Adjusting for the procedures to check inlet manifold pressure and aftercooler core leakage.Wrong Timing Position Sensor Calibration - Refer to Electronic Troubleshooting for 3406E and 3456.Too Much White Smoke
Probable Cause
Engine Misfire - Refer to Electronic Troubleshooting for 3406E and 3456.Wrong Timing Position Sensor Calibration - Refer to Electronic Troubleshooting for 3406E and 3456.Coolant In The Combustion System - White smoke can also be caused from the following problems.
Coolant in the combustion chamber
A cracked cylinder head
A cracked cylinder liner
A faulty cylinder head gasketToo Much Blue Smoke
Probable Cause
Too Much Oil In The Engine - Do not put too much oil in the crankcase. If the oil level in the crankcase increases during engine operation, check for fuel in the crankcase. Fuel can be eliminated from the crankcase by making repairs or replacements to the fuel injection lines and the nozzles.Failed Turbocharger Oil Seal - Check the inlet manifold and the aftercooler core for oil. The turbocharger should be repaired or replaced.Worn Valve Guides - See the Specifications module for the maximum permissible wear of the valve guides.Worn Piston Rings - Worn piston rings and/or cylinder walls can be the cause of blue smoke and a loss of compression. Make a visual inspection of the cylinder walls and the piston rings. If necessary, measure the cylinder walls and the piston rings. Refer to the Specifications module for the