JD1050 Wont take power and blowing black smoke

[Jerry/MT]

I have a friend that just bought a JD 1050 with an engine problem. The tractor will idle but when the throttle is advanced to about 1200 rpm's it rattles, blows lots of black smoke and quits. The 1050 is a turbocharged tractor.

Things done to date:

1) Injectors checked by qualified shop and they checked good.
2) Disconnected the intake at the manifold to verify there isn't an air restriction.
3) Verified the return lines are open.
4) Verified the thermostart system isn't leaking extra fuel into the manifold.
5) Verified the compression is good (Over 400).
6) Intend to run the engine on an alternate fuel source but not done yet.

I think we are down to the injection pump or the turbocharger. I think it would be a good idea to verify the injector pump timing but we don't have any reason to think it's wrong. The pump doesn't look like it's been messed with.

Is disconnecting the air intake at the intake manifold a valid test? Will a turbocharged diesel run correctly with the turbo removed? I think this is a valid test but I do not completely understand the relationship between the fuel flow and the air intake, especially considering this is a turbocharged engine.

Does anyone have any thoughts on this problem? We are trying to be systematic but neither one of us has any real experience with the turbocharger.

You dine a pretty thorough troubleshooting check.

If the turbo is not supplying sufficient airflow, you'll blow black smoke. Is the muffler unrestricted? is there a place you can measure the compressor discharge pressure and a spec range for that. If the discharge pressure is below spec, the turbo may be damaged and is not supplying enough air.

But check the pump timing first. It could also be a problem within the injector pump. Sorry, no easy answers.

 

[Spanner]

Update on this thread:

My friend that owns this 1050 sent me a text last night that the muffler was plugged. Corrosion.

At one point or another we had convinced ourselves it was likely the turbo or the injection pump. The real cause is a reminder of how simple these engines really are and to always look at the simple things first. Either one of us should have thought to check this before anything else was done.........yet we overlooked the obvious. The good news is that it's a cheap fix.

You dine a pretty thorough troubleshooting check.

If the turbo is not supplying sufficient airflow, you'll blow black smoke. Is the muffler unrestricted? is there a place you can measure the compressor discharge pressure and a spec range for that. If the discharge pressure is below spec, the turbo may be damaged and is not supplying enough air.

But check the pump timing first. It could also be a problem within the injector pump. Sorry, no easy answers.

Always advisable to read the whole thread before re-inventing the wheel. Page 2 in particular.