Yanmar 1401 Stuck Arms 3 point jammed

[JPS3]

Hi everyone

Not sure if I am in the right category here as I am trying to help someone with their small tractor.

Its a Yanmar 1401 and the problem with it is the arms will not raise or lower.

The PTO works fine and engages in all 3 positions

I have attached some photos so you can see it and I have looked on line for a service and user manual. So far I have found a generic user manual for it and a parts catalogue in Chinese!!

He told me he had changed the oil using a red HV46 which he says is the correct one for this model but he had not removed and cleaned the filter which I did today.

Sadly it didn't make any difference and the arms still remain stuck in the Up Position.

I tried altering the flow Valve and I can feel the Operating Lever Selector Spring when I push it forward for Up but not so much when I pull it back for Down.

We have both tried pulling the arms down by hand but it appears seized or locked there.

I am not sure if by removing the the top over plate would allow access to free it off? or if there is a safety override lock that needs resetting?

So I would welcome any advice on how to fix it?

 

[oldnslo]

Not familiar with Yanmar but on a lot of different brands there is a knob usually located below the seat for controlling how fast the 3 point will lower or drop. If this is closed the arms will raise and stay in raised position.

Hopefully some knowledgeable in Yanmar will chime in and confirm this is an option on that model.

 

[JPS3]

Not familiar with Yanmar but on a lot of different brands there is a knob usually located below the seat for controlling how fast the 3 point will lower or drop. If this is closed the arms will raise and stay in raised position.

Hopefully some knowledgeable in Yanmar will chime in and confirm this is an option on that model.

Thanks for the reply as I said I did try adjusting the knob but sadly it made no difference

 

[JPS3]

I think I got the terminology wrong I probably should have said rear end loader

 

[jigs_n_fixtures]

I think I got the terminology wrong I probably should have said rear end loader

3-point lift arms

 

[JPS3]

3-point lift arms

Thanks for the reply i hope tour arm is getting better!!!

 

[JPS3]

Thank you for all the replies and advice. I have done some further research and I think that the 3 point piston is jammed and is either rusted inside or a blockage.

I cannot find a good diagram or photos of this and although some links have been posted referencing southern tractors when I click on them they just go to their homepage

So if anyone has any photos or diagrams they could post I would be very grateful.