1070BK

Member
finally getting to this project. Pto ran continuously and after receiving info from this forum, I was ready to attack this problem. I have a late model 670. It is not a super. The tractor has the plug hole on the side to access the internal workings of the pto. I was able to easily remove the plug but I can't seriously see how I'm suppose to be able do any adjustment through that hole. I can't see anything. Some of you indicated that I should remove the hydraulic assembly above and then access the pto from the top. If I'm correct, it appears that if I disconnect the lines from the pump and power steering lines that the top unit should lift off. Am I looking at this correctly? I'm thinking it would make the job much easier.
 
Here's a dumb question, are you saying the pto turns all the time under load without engaging it? We had a 670 and the pto turned all the time from new, but not if it was hooked up to a baler etc. without engaging it.
 
There is no brake on any MM pto until 670 Supers. They will turn all the time even more so in colder weather. The oil will be thicker. Easy way to check is with tractor off and pto not engaged put a punch in hole in pto and see if it will turn. If set properly it will turn. If too tight or clutch pack worn it will not turn.
 
Do you mean it's possible that nothing is wrong with the pto? I just got the tractor this summer and haven't actually used the pto. It's just that it was turning and I couldn't shut it off with the handle. Guess I should put it under load and see how it operates. Wow I learnt something today. Thanks.
 
Example: Had a M5 was almost new. When sitting idling pto turned. Hook up to a 1100 IH mower.baler or whatever. Requires a little resistance otherwise it will rotate. You may be trying to create a problem!
 
Yes, hook your PTO up to something and see if it still turns with a load. I think all MMs of that era will turn without being hooked up to something. They do have a brake band but are not reliable. Yes, you would access it from the top. I replaced the yoke on my JS3. Not difficult but messy work. This might be one of those things you "leave well enough alone". Brian
 
I agree, it might not need any adjusting. I have an M5 that I bought from a guy and he said the pto turned all the time since new. Like was said, heavy oil drag is the main cause. It is supposed to be technically possible to adjust the pto through the plug in the top cover but I cant even get the plug out of my M5. You can look through the hole and see if you can find the adjusting pin. You might have to turn it over some to get it so it is visible. Does your pto lever have good "snap" to it? If it has good resistance when snapping into gear I would use it as is.
 
Take a pipe flange that slides over the pto shaft, whatever diameter you like. Weld it to a couple metal straps and bolt to pto housing. Take a length of that pipe with a cap on it. Easy on easy off... and safe too... now wasn't that easy !
 
Not likely anything wrong with the PTO. Enjoy one of the quirks of MM tractors and resign to shut the tractor off to hook up anything PTO. With MM, your friends can repeatedly point out that there's something wrong with your PTO, you'll know that there isn't. Next thing you know, you'll be drilling a hole in a new thermostat, another MM trick. Enjoy your tractor and it's unique features, leave the PTO alone and don't be like so many who think that if they ream on the lever that the PTO will stop. Unaware operators do that and that's when thinks get broken, like yokes and levers.
 
302 and 5-star I owned were that way and I think 670 and 900 as well. One word of safety is always shut off the tractor to hook up the pto if it is turning. Don't try to stop the pto by hand. And as mentioned the colder it is the more it takes to stop the pto.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top