Sunday, September 02, 2007
Diesel Engine Repairing Troubleshooting
Diesel Engine Repairing & Troubleshooting requires some common sense and basic fundamentals to find a problem whatever it may be. I have lots of experience in the "will not run" category, there is one thing you should do first, "always check the source!"
Think about the source everytime you begin your search for a diesel engine fault. On a basic diesel engine without electronics the first thing you do for a "no run" condition is check the fuel tank, is there fuel? Check the fuel filter for the amount of fuel remaining in it, it should be high enough to reach the filter base pick-up [where it screws onto]
If you've got fuel just move up the line to the Primary fuel filter and then to the Secondary filter, the Primary filter is on the vacuum side of the fuel transfer pump while the Secondary filter is on the pressure side of the transfer pump. If your fuel filters are primed and unrestricted crack a line on the pressure side of the fuel transfer pump and crank over the engine, check for a positive fuel flow [if not checkout the pump which typically is a mechanical pump that runs off the camshaft] in the case of the 3116 Cat the pump is in the Governor housing.
If you have fuel go to the injection pump and crack a line and check for a positive fuel flow while cranking. If not check the fuel shutdown solenoid for proper operation [could be a mechanical or electrically activated type solenoid] then the injection pump drive, usually off of the camshaft gear. Once you understand that a diesel engine needs air and fuel to run that's where you start and always at the source. This a general procedure that might save you some grief and a tow truck bill.
Another favorite saying in this industry is "always check the simple things first!" It isn't rocket science but once you start going down the wrong path it will cost you time and money...