Help with lift drifting down/: Chinese Tractors -- Jinma Farmpro Agracat  -- Chinese Tractors Discussion Forum and Review Help with lift drifting down/: Chinese Tractors -- Jinma Farmpro Agracat -- Chinese Tractors Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Chinese Tractors -- Jinma Farmpro Agracat Forum

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 08-06-2010, 13:00 Post: 172842
TerryA



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 Help with lift drifting down/

I have a Jinma 254 tractor and I need help with the lift drifting down.

I have replaced lift valve on side of tractor and hasn't done any good.

Has anyone here had any problem with their lift and could share with me how you got it fixed.

Thanks, Terry






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 08-06-2010, 13:48 Post: 172843
greg_g



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 Help with lift drifting down/

Quote:
Originally Posted by TerryA | view 172842
I have replaced lift valve on side of tractor and hasn't done any good.

Explain "lift valve on side of tractor" please. Because your problem is internal; the O-ring seal and at least one wiper on the lift cylinder is damaged. 99 times outa 100 that's as a result of raising the rear lift too high. When that happens the seal and wiper(s) extend beyond the cylinder walls, and are damaged when lowering the lift forces them back inside the walls. Very common problem, repair kit is cheap, job is just a bit messy.

When it's fixed, note the thumbscrew stops on the lift linkage (to the right of the seat). You must physically set them to regulate lever travel, which in turn limits cylinder travel They're there help prevent the kind of problem you're having right now.

//greg//






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 08-06-2010, 19:10 Post: 172854
TerryA



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 Help with lift drifting down/

This picture at the link below shows what I replaced:

http://www.affordabletractorsalesco.com/cart/sub_catalog_gallery.php?cid=1249&catid=106&picid=1403&category=Parts%20Center&sub_category=Hydraulics&scid=100&PHPSESSID=d97135d724272d201e40f13619cd0e42

Please tell me what the lift cylinder is and where is it and how do I fix it.

Thanks so much for your help.






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 08-06-2010, 23:28 Post: 172870
greg_g



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 Help with lift drifting down/

It's unfortunate that you wasted your money on that control valve. The old one is probably perfectly fine. The lift cylinder is inside the hydraulic sump (reservoir) underneath the operator seat. There are 3-4 different sumps used on the Jinma 200 Series, so I can't tell you how exactly how to do yours. One way is to get at it from the rear, which involves removing both the rear plate and the front flow control valve. Others you remove the seat and go through the top. The repair kit is little more than a collection of O-rings, wipers, and seals (picture below). But - depending upon whether you go in through the top or the sides - you might want to consider ordering gaskets too (link below).

There's also a short video on U-Tube about repairing the Jinma lift cylinder that might help. ( http://www.youtube.com/watch?v=UW22rjKPuHQ )

//greg//






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Chinese Tractors -- Jinma Farmpro Agracat: Help-with-lift-drifting-down

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 08-11-2010, 16:08 Post: 173032
TerryA



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 Help with lift drifting down/

Hey Greg. Thanks for the utube and the link. I haven't had time to get into this again, but will as soon as possibe and will let you know how it goes.






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Discussion Boards > Active Subjects > Messages as Posted > Chinese Tractors -- Jinma Farmpro Agracat Forum

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