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Hi There,

Looking for a little help with the rear PTO on a Massey 1650. I purchased it from a fella who had rebuilt the engine and transmission. It's running great, but it looks like at some point there was an electric clutch for the rear PTO that was removed.

There is still a switch for when the PTO lever is set to off, but the wires from the ignition are butt spliced together. Does anyone have a picture of how the shaft for the rear PTO should look? Maybe some further info on this, or how I could add a clutch back in? This is a bit of a headache, as the rear PTO is always spinning when the tensioner pulley is off, and the belts fly off, not to mention wear.

Also - quick question - Anyone know where to find the clips that hold the rear PTO pulleys in place on the back of the shaft?

I have the wiring diagram and all manuals. Feel free to use them as a reference.

Much appreciated.
 

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Your tractor never came factory with an electric rear PTO. Just a lever that tightened the belts for it to run. Post some pics, maybe we can figure it out for you.
 

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The PTO shaft is driven from the main drive shaft. There is one double groove pulley on the main drive shaft (engine to transmission), that pulley is connected by two belts to a double groove pulley on the PTO drive shaft. That drive shaft runs under your seat to the rear PTO,where it is connected to the lower (output) pulley of the PTO by two belts. The PTO lever that is on your right hand fender controls the tension of the belts between the PTO drive shaft and the output pulley. The PTo drive shaft is always turning because it is directly connected to the main drive shaft. I suspect that someone put on the wrong belts between the PTO drive shaft and the output pulley.

The wires that you see connected together are a bypass for the PTO safety switch. The tractor is not supposed to start if the PTO lever is in the on position.
 

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Discussion Starter · #4 ·
Great information, that helps a lot thanks. He must have just bypassed the safety switch with the butt splice.

Would you happen to know off hand the size of the retaining ring that holds the pulley above the output pulley? That might be contributing to my problem as the upper pulley on the PTO shaft slides back towards the seat, grinding against bolts from time to time.

The groove for the retaining ring is also worn slightly. Do you think that a small sleeve or washers might be able to do the same job as the ring?

Thanks again.
 

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Great information, that helps a lot thanks. He must have just bypassed the safety switch with the butt splice.

Would you happen to know off hand the size of the retaining ring that holds the pulley above the output pulley? That might be contributing to my problem as the upper pulley on the PTO shaft slides back towards the seat, grinding against bolts from time to time.

The groove for the retaining ring is also worn slightly. Do you think that a small sleeve or washers might be able to do the same job as the ring?

Thanks again.
3/4" snap rings for those splined shafts.

Yes machine washers or some other type of spacer should do the job but you will need a snapring on the back side to keep the pulley on the shaft.
 
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Discussion Starter · #6 ·
3/4" snap rings for those splined shafts.
Yes machine washers or some other type of spacer should do the job but you will need a snapring on the back side to keep the pulley on the shaft.
Thanks much. Fortunately the groove on the back side is in perfect shape. This should help greatly.
 
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