[aras]

We have a Gleaner L3 with the big engine and hydrostatic. Last fall the engine threw a rod so this summer we replaced it with an engine from a L2. Now there is a vibration that is rather pronounced at 1700 RPM. I did replace the oil seal on the flywheel and change the harmonic balancer to the four groove model from the old L3 engine.

Any suggestions -- Thanks for your help

 

[hellandharvester]

Did you try running the engine with the hydro belt removed to make sure the vibration is in the engine and not from somthing else?

 

[js5020]

I would suggest the same thing to isolate the problem, start unhooking stuff till ya find it. Didn't have any pieces left over after the engine exchange?

 

[js5020]

Can't say I blame you for wanting the engine to stay together,,, I had to swap one out in the field once,, what a pain in the butt,, oh almost forgot EXPENSIVE! I guess you didn't notice if there was a vibration while the engine was in the old machine? I'm also guessing the old engine didn't have this vibration?

 

[gleanerman]

A long shot... The only time we had an engine vibration it was caused by dirt buildup in the flywheel cavity behind the PTO drive plate.. but it sounds as if you were already in there if you replaced a bearing. Can't imagine why there would be a pilot bearing in the flywheel unless that engine or flywheel was originally in a tractor.

 

[drallis]

Did you use a dial indicator to align the rear PTO shaft to the engine?? or just bolt things together?????

 

[aras]

I did not use an indicator when I bolted the dampening disc to the flywheel. Didn't seem to be any play in the bolts either. The bearing in the flywheel centers the shaft on the flywheel but it did look like the shaft rubbed on the flywheel once upon a time -- probably why the bearing was installed. I did check the flywheel with an indicator.

Should I remove the bearing and indicate the shaft?

Good suggestion -- Thanks

 

[drallis]

Why don't you remove the rear PTO shaft by pulling it backwards and run the engine and see what happens. Only takes four bolts to remove for a test.

 

[aras]

Thanks -- but I tried that and it appears to be in the engine. I was a little concerned about running the charge pressure to the hydro with the belt off so I didn't run it long but the vibration was still there. Is it possible that the main idler could pull the belt off center enough to cause a vibration? Also the parts book doesn't show a bearing in the flywheel but there was one there that I replaced as long as it was apart.

Keep the suggestions coming -- I want this engine to stay together!