pto not engaging

[Greg Elsenrath]

Dad was brush hogging when the support arm for the brush hog broke making the brush hog drop in the back (where the wheel is)and keep using until the pto stopped working. Took off brush hog and took of overridding clutch. Clutch had a broke roll pin so I replaced and put back on. Turn pto on and it turned. Took to our farm and hooked brush hog back up and now it wont turn with a load on it.Any ideas what could be wrong??? If i take the pto shaft out to inspect will I have to break the tractor into to fix???
 

[Tom H.]

If you want to take the PTO shaft out, simply park the tractor with the front end in a ditch so that the transmission/hydraulic oil will pool forward in the housing and then remove the four bolts on the shaft housing to pull the pto shaft straight out. Or jack up and support the rear end to do the same thing. There is around 7 gals of oil in the housing.

You may want to open the side plates and see it the PTO lever is engaging correctly first.
 

[Greg Elsenrath]

Ferguson to-20 is the tractor I am talking about
 

[Greg Elsenrath]

Do I have to drain oil to inspect the pto lever is engaging?? The lift arms go up and down so I thought the lever was engaging properly or is there a seperate operation for the lift arms versua the pto shaft??
 

[Dan S (NY)]

When you have the brush hog hooked up and it won't spin up, can you lift the hog up off the ground at the same time? If you can, the PTO shaft is turning in the pump and the problem must be somewhere behind the pump. Maybe the ORC is busted and not transmitting power when a load is put on it?

Dan
 

[Jerry/MT]

Check you ORC and make sure that its functioning properly. If you lift arms are working, the front half of the pto shaft is engaged in the pump and turning. If the external part of pto shaft isn"t turning either the ORC is damaged and slipping or the shaft is broken aft of the pump. Pull the right hand side plate off and look unless you find it"s the ORC.
 

[John(UK)]

A few things could have happened here, if the PTO shaft from the HOG is tight and it is hard to "telescope" into the other half, it could have pulled the PTO out of the gear inside, but usually it will show at the back end as the shaft will stick out more than it used to do.
You could have broken the PTO shaft in the tractor but it is unusual. You would need to pull the PTO out to check that. DON'T try the suggestion of dropping the front wheels into a hole to save draining the oil, all this will do is fill the Clutch Housing with oil if the oil seal is worn, it is OK if the seal is good but not when it is worn. You can pull the PTO shaft out without too much trouble, just four bolts and pull it out after draining the oil. Being that the pin in the ORC has broken, that is a clue that the pin was overloaded and that is why it broke and the cause could be that the PTO shaft on the Hog is tight, you should clean this anyway and make sure that it slides easily. If the Hog has been lifting too high then the PTO shaft will be bent. If the shaft was tight like it seems to have been, it could be the ORC has pulled apart as well. You will need to look closely at it. Because you didn't have anything on the PTO when you tried it after replacing the Pin it is quite possible that it would turn without any load on it, when you fitted the Hog again, that would prevent it turning. Now I have the information about your tractor and the type of Bush Hog you have I can now send you the information that I mentioned a couple of days ago....John(UK)...fergusontractors@hotmail.com