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Discussion Starter · #1 ·
Helo
I was faced with the topic of buying a tractor, I came across a Ford 4630 in poor visual condition,
produced in the 1990, 6000 engine working hours with front loader.
Seller tells that everything is ok, without PTO - it works all the time, can't disengage.
Please help, could something like this suggest a serious failure that is difficult to remove?
Are there any typical faults that occur with tractors of this type?
Regards and thanks in advance for all the help
I have not had contact with tractors of this brand before
, so I do not know what to look for ...
Greetings from Poland and sorry for mistakes :)
Tire Wheel Cloud Sky Vehicle
 

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That model is a little newer than I am familiar with but I suspect the pto is similar to the older ones.
For a test, engage the pto and let the tractor idle. Then take a stout board and and use it as a lever against the ground or 3 point hitch and see if you can easily stop the pto from turning.
Those PTOs are engaged by means of a hydraulically operated clutch. There is a pto brake on them that should stop it from turning when you shut it off.
But that brake is just a flimsy little thing and NOT designed to stop a heavy bush hog from continuing to spin after you disengage the pto.
It wears out that brake quickly.
If you can stop it easily with your board then it is the little brake is worn out and the friction of the oil in the hydraulic pto clutch is causing it to turn. I had a 4000 that I could grab the pto with my BARE HAND and stop it.
If you can NOT easily stop it with your board it likely has been abused and has warped discs in the hyd clutch.
To fix either issue requires removing the rear end of the tractor.
So, depending on what your test shows:
If you can easily stop it I would just live with it.
If you can not stop it then I suggest you repair the pto clutch.
Photo shows the pto brake on a 4000.
Tha actual brake pad is that little bronze colored square.
Please let us know the results of your test.
Hand Glove Helmet Sleeve Waist
 

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Discussion Starter · #3 ·
Thanks for Your reply.
Okay, so if the PTO doesn't stop, you have to disassemble the tractor in half?
Will it be an expensive repair and it is better not to buy this tractor?
 

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Thanks for Your reply.
Okay, so if the PTO doesn't stop, you have to disassemble the tractor in half?
Will it be an expensive repair and it is better not to buy this tractor?

Test the pto by prying against it with a 50mm x 100mm x 3m board!
If you can easily stop it I would buy the tractor and live with it.
If you can not stop it then the tractor must come in half to fix it. In that case I would not buy the tractor or I would discount the price by $3000 USD.
 

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Discussion Starter · #6 ·
Test the pto by prying against it with a 50mm x 100mm x 3m board!
If you can easily stop it I would buy the tractor and live with it.
If you can not stop it then the tractor must come in half to fix it. In that case I would not buy the tractor or I would discount the price by $3000 USD.
Sorry for my question, but I need additional help,
should I:
1. turn on PTO lever
2. test it with board?
(PTO lever all time on position on and it should stop spinning?)
Is it ok?
Or test it with PTO lever off?
 

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Sorry for my question, but I need additional help,
should I:

2. test it with board?
(PTO lever all time on position on and it should stop spinning?)
Is it ok?
Or test it with PTO lever off?
1) Start tractor.
2) Set engine speed at low idle.
3) Leave pto OFF.
4 Use board as a lever to try to stop pto from turning.
5) After you have done that post back with results.
 

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You can also try turning the pto shaft by hand with the tractor shut off and the pto off.
It should turn just a bit.
Then try and find a partially released position on the engagement lever and it should turn freely in either direction.
If it turns freely with the lever in the disengaged position that is another indication the brake is out.
 

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Discussion Starter · #11 · (Edited)
1) Start tractor.
2) Set engine speed at low idle.
3) Leave pto OFF.
4 Use board as a lever to try to stop pto from turning.
5) After you have done that post back with results.
Ok, thank You very much.

I'v got another question about 4630 ford tractor,

Is there any known issues?

What should I search for in used tractor?

  • Test gearbox on any gear on L and H range,
    reverse (tractor must be fully stoped and clutch pressed to switch reverse?)
    8x8 gearbox are synchronized, so I could reduce gear like in car?

  • Test hydraulic on cold oil or try to heat it and test?

  • FWD - any problems with that? loose bearings? worn out gears?
  • Any known engine issues?

Sory for next maybe stupid questions, but I'v got only very old tractor from 70's :) with not synchronized gearbox
 
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