Jd 1050 turbo chirp?

Conservation · Jul 20, 2009

My 1050 seems to have a chirp or maybe a squeel coming from from the turbo area at mid to high rpms. It seems to be getting worse. Where do I start?

spruce Deere · Jul 20, 2009

Sounds like a bearing in the turbo getting ready to seize. Make sure there is no air leaks/exhaust smoke from a loose or cracked manifold or loose clamp some were. Had a cracked exhaust manifold on a 6BTA cummins that had a intermittent, shear squeel/ old steam engine whistle sound with varying RPMs. Thought it was the turbo at first, till I pulled a panel off the side of the timberjack and seen soot trail from the crack. Have had whistles, extreme black smoke and poor engine performance and strange noises from loose clamps on turbo-ed engines.

Conservation · Jul 21, 2009

Thanks. I will check for leaks first. Is there a way to check the turbo bearing? I imagine it has to come out to be checked. I assume there is one on each side of the turbo?

Dirthog · Jul 21, 2009

Pull either hose or tube off the turbo and see if you can turn the impeller by hand and see if there is any movement in it or if it is hard to turn. I would not try and replace the bearings in it myself they turn at Very high speeds and one little screw up and the turbo is toast and if the pieces go into the engine??? I have seen that happen more times than I care to count too.

spruce Deere · Jul 21, 2009

The turbo impeller should turn freely, easy and smooth with one finger. An impeller that does not turn as such, is a problem. Dirthog is right, if it is a bad turbo, just replace with a new one. I would not try too rebuild the turbo neither. A turbo may be a few hundred bucks, but a new engine is a few thousand bucks if turbo pieces get sucked in and digested.

RickB · Jul 21, 2009

Conservation said:
My 1050 seems to have a chirp or maybe a squeel coming from from the turbo area at mid to high rpms. It seems to be getting worse. Where do I start?

Likely from turbocharger bearing play allowing the turbine(s) to hit the housing.

Conservation · Jul 21, 2009

It seems to have more radial play then it should by feel. The axial play is minimal. I can easily turn it, but it stops soon after removing my fingers. JD wants $980 for a new turbo. Bearings are $70. I am going to remove and disassemble to see what it what, and what is bad now. If the shaft is worn, no sense trying to save it. If the impellers show wear, same deal. If it is just the bearings, they are held in from my understanding with c clips. I need to check the oil supply also. Any other suggestions? What is the general cause of this? I always idle down for a minute after removing load.

RickB · Jul 22, 2009

Find a local injection pump shop and get a quote from them on a rebuild/replacement. I wouldn't disassemble it before talking to them; they might not want to recieve it as a box of parts. Causes of bearing play are normal wear and tear, less than optimum oil flow, poor oil quality. It's not like a 1050 is a new tractor.

Conservation · Jul 22, 2009

Good call. But where would I find one of those shops? Not sure what to look under in yellow pages. Thanks for the help!

RickB said:
Find a local injection pump shop and get a quote from them on a rebuild/replacement. I wouldn't disassemble it before talking to them; they might not want to recieve it as a box of parts. Causes of bearing play are normal wear and tear, less than optimum oil flow, poor oil quality. It's not like a 1050 is a new tractor.

MikesTractor · Jul 22, 2009

Ask any good diesel mechanic. Maybe even your favorite tractor dealer. They should know where the best shop is.

Mike

Dirthog · Jul 22, 2009

The shaft could be bent slightly or out of balance or the housing could be wore a little. As I said I would not mess with it and I have spent 35+ years as a heavy equipment mechanic your engine turns at apx 2500 rpm the turbo turns at around 10 times that so even a small problem can cause big trouble with a turbo. If it explodes you will at the very least taking the manifolds off and more than likely the head depending on how far the pieces went and how fast you got it shut down. And it does happen more than you know

psj12 · Jul 22, 2009

If the chirp was indeed from contact withthe housing be sure to check the ends of the impeller blades and housing for the slightest amount of damage. If there is any damage at all replace the turbo. If not then a bearing is not that hard to replace.

spruce Deere · Jul 22, 2009

Chances are the diesel repair shop you find could get an aftermarket turbo like an air research or hole set. They just might be cheaper than deeres' $980 replacement. If you have them "rebuild" your turbo, the price may not be that much different from aftermarket anyhow. When a tubo gets lunched or is preparing to "go to lunch" like yours sounds like, I would still would go new turbo or aftermarket. It does not take much in parts, if you do it your self or have a repair shop do it, parts plus labor and prices start equaling out.

Conservation · Jul 22, 2009

Well. I may have good news. I checked all the clearances on the turbo, and they are right in spec. Hard to believe with a tractor with 2400 hours, but maybe it isn't the original. In any case, everything looks good with the turbo. So where is this chirp coming from?
Hard to tell if exhaust manifold gasket is leaking, so I orded a set of gaskets and will pull it apart when they come in. I also ordered a valve cover gasket, and will run the valves just to eliminate that as a posibility. I appreciate all the advice, and keep it coming.
Thanks,

Conservation · Jul 24, 2009

Kind of embarassing, but I always fess up. I found a crack in the muffler elbow. I didn't see it until I was cleaning up the parts. That's where the noise is coming from all right. Glad it wasn't expensive. Thanks for the input.

spruce Deere · Jul 24, 2009

Thats good! Those cracks can be sneaky!

Conservation · Jul 24, 2009

When I cleaned up the inside of the muffler elbow with carb cleaner, the crack became appearant. I really missed that diagnosis.. And I am glad it worked out that way! I was able to get some mowing done this afternoon.
Thanks for all the input.

sandman2234 · Jul 24, 2009

The turbo on the Freighliner I drive at work has been screaming for the last 30,000 miles. I told them about it several times, but to no avail. Since it is a Penske truck, I guess they will eat the costs when it goes. Glad yours wasn't as serious as first thought.
David from jax

Conservation · Jul 26, 2009

sandman2234 said:
The turbo on the Freighliner I drive at work has been screaming for the last 30,000 miles. I told them about it several times, but to no avail. Since it is a Penske truck, I guess they will eat the costs when it goes. Glad yours wasn't as serious as first thought.
David from jax

Pay me now, or pay me later! Maintenance.