Construction and Road Equipment
Construction and Road Equipment repair questions? Ask a mechanic ASAP
Hello there! I am a qualified Heavy Equipment Technician here at Just Answer, I will help you diagnose and repair the problem you are having with Excavator. There are a few problems that can cause black smoke with a diesel engine, I will do my best to walk you through a process of elimination to locate and repair the symptom you are having. Does the engine start quickly without any issues? If you perform whats called a "torque stall" you can identify if the problem is related to a powertrain or hydraulic issue, vs an engine issue. If you place the engine in gear and apply the throttle while your foot is on the brake, does the engine power out and smoke? If so, lets start with the following:Lets start with the simple, least expensive, possible problems. You mentioned that you have changed all the filters, have you check the air filter, housing, and intake piping for any restrictions? One of the most common problems with a black smoke symptom is a lack of air getting into the engine. If the airway is free of restriction there could be a problem with your turbocharger or fuel injection system, and can diagnose this issue further if you are still having problems.I hope this answer helps you, I am here if you need any further assistance!Take care,
It torque stalls with no symptoms such as loss of power, or black smoke?
Throwing parts at a problem is a great way to spend lots of money. Lets see if we can diagnose this problem the first time!
Referring back to my first post, have you check the air filter, as well as the intaking piping, to check for any possible blockages?
Ok, thats great. Is there any chance you would have access to a gauge you could hook into the charge side of the intake? We need to make sure that we have the proper amount of boost reaching the engine while under load.
The gauge should ready between 0 and 40 psi. At full torque stall this engine should produce more then 15 psi of boost.
I'm happy to hear the problem has been fixed! If there is anything else I can help you with, just let me know. If possible, please leave feedback on the help I provided today. It would be very appreciated!Take care,
I have now enabled the "I am ready to be rated" option.Thanks for your business, and if there is anything else I can help you with in the future, just let me know.Take care,Derek