Oliver 77 PTO Repair Question

JF Calhoun · Mar 19, 2015

I have quite a problem and really need some advice. My Oliver 77 gas has a problem. It seems that the long PTO gear drive shaft that goes from the front of the transmission to the rear of the tractor has overheated and it has spun in two pieces. It spun off at the engine end of the shaft deep in the tractor. I need to remove the part of the shaft that is still in the tractor. Any suggestions would be greatly appreciated!

chucksoliver77 · Mar 19, 2015

How long is the piece that you have removed?

oliver90owner · Mar 19, 2015

With the information supplied, I would not be trying a quick fix. Needs investigating properly with the machine taken apart - as in engine removed? Apart from that, a magnet on a stick might be your best attempt!

rrlund · Mar 19, 2015

Can you take the main drive shaft coupler apart,then unbolt the bell housing,then slide that back far enough to get the PTO shaft slid back? It will depend on how long the front piece is,but I'm thinking if that works,you can take the 4 bolts out that hold the entire PTO housing on the rear and get ahold of the piece to pull it on out.
Might have to unbolt the pressure plate and slide that back on the shaft to get ahold of the PTO shaft?

Of course we might be making too much of this. If the piece is long enough,maybe just taking the cover off the top of the transmission will let you get ahold of it to slide it back.
Any way you do it,I'd take off the PTO housing first.

Jared Chaddock · Mar 19, 2015

We repaired one of those once... Had to pull the engine. Lifted it and slid it forward to get it out. It had broken inside the input shaft and jammed, so it actually made the tractor drive with the main clutch pushed in!

Ken Grimm · Mar 19, 2015

If all else fails: Take a 1/2 inch rod long enough to shove into the tractor that will touch the broken shaft and stick out the back of the tractor a few inches. First wrap the rod very well with electricians tape, except for each end. Next hook your welder electrode holder up to the rod and clamp the ground onto the engine. Turn your welder on and the rod should spark and "spot weld" itself to the broken shaft. Then, pull it out. An old Oliver mechanic taught me this a long time ago. He said they used this trick many many times. Be careful, but it works.

Gary Mitchell · Mar 20, 2015

I'd have to give a long "think" to how many transmission bearings and races I may be arcing little dits on before I tried that method.

JF Calhoun · Mar 20, 2015

I believe that the broken off piece is approximately an inch and a half long. Thank you for all the great answers. I know it will be quite a job. I will see which option works best and will try it.

rrlund · Mar 20, 2015

If it's no longer than that,just take the coupler apart and unbolt the bell housing.

Ken Grimm · Mar 22, 2015

Hey, it works! If the shaft is wrapped and you push it up to the broken shaft, then barely back it up, turn the welder on, push it to the broken shaft, it will arc, shut the welder off and carefully pull it out.

Oliver 77 PTO Repair Question

JF Calhoun

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chucksoliver77

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oliver90owner

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rrlund

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Jared Chaddock

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Ken Grimm

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Gary Mitchell

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JF Calhoun

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rrlund

Well-known Member

Ken Grimm

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