3-point leaking down: Jinma Farmpro Agracat  -- Chinese Tractors Discussion Forum and Review 3-point leaking down: Jinma Farmpro Agracat -- Chinese Tractors Discussion Forum

  parts   |   manuals   |   discussion   |   photos   |   podcast   |   reviews   |   specs   |   dealers   |   classifieds   |   contact   |   faq   |   myProfile   |   home          Login Now | Sign Up


FAQ:   What is a tractor?

Forum Index

Kubota Tractors
  Kubota News
  Kubota Price
  Kubota Review
John Deere Tractors
  John Deere News
  John Deere Price
  John Deere Review
New Holland Tractors
  New Holland Tractor Price
  New Holland Tractor Revie
Other Tractor Brands
  Articulated Tractors
  Belarus
  Bobcat Tractors
  Case
  Cub Cadet
  Hinomoto
  Kioti Tractor
  Long
  Massey Ferguson
  Mitsubishi
  Other Tractor Brands
  Other Tractor News
  Shibaura
  Yanmar Tractors
Lawn and Garden Tractors
  Craftsman
  Cub Cadet Garden
  John Deere Garden
  Kubota Lawn Garden
  Other Garden Tractors
  Simplicity
  Toro Wheelhorse
  Ventrac Lawn Tractors
Antique Tractors
  Allis Chalmers
  Case David Brown
  Farmall IHC
  Ford
  Ford 9N 2N 8N
  Fordson
  Harry Ferguson
  John Deere Older
  Massey-Harris Ferguson
  Minneapolis Moline
  Oliver Cletrac Cockshutt
  Restoration
  Tractor Pulling
Tractor Attachments Implements 3ph
  Back Hoe
  Field Mowers Brush Cutter
  Grooming Mowers Finish Mo
  Loaders
  Snowblowers / Snow Plows
  Tillers and Ploughs
  Tractor Implements
  Trenchers
  Wood Chippers 3PH
Tractor Maintenance
  Diesel Fuel Lubrication E
  Tractor Engine Repair Reb
  Tractor Tires
Utility ATV
  All Terrain Vehicles
  John Deere Gator
  Mule Utility Vehicles
General Tractor
  Farming Ranching Agricult
  Photo Contest
  Size Tractor Needed
  Tractor Projects
  Tractor Safety
  Welding
Chinese Tractors
  Jinma Farmpro Agracat
  NorTrac Tractors
  Other Chinese Tractors
Cars
  All Brands
  Audi VW
  BMW
  Car Tires and Maintenance
  Chrysler
  Exotic, Sports, Racing
  Ford Cars
  General Motors
  Honda
  Hyundai
  Mercedes
  News
  Nissan
  Subaru
  SUV and Trucks
  Toyota Cars
Trucks Trailers
  Chevy Pickup Trucks
  Dodge Pickup Trucks
  Ford Pickup Trucks
  Toyota Pickup Trucks
  Chevy Pickup Trucks
  Dodge Pickup Trucks
  Ford Pickup Trucks
  Toyota Pickup Trucks
Home Building
  Alternate Electric Energy
  Barns Pole Barns
  Buying Ranch Farm Acreage
  Carpentry
  Contractors
  Electric
  Excavation
  Moldings Finish Trim
  Other Home Building
  Pellet Stoves
  Plumbing
  Wood Stoves
Tools
  Electirc Power Tools
  Gas Power Tools
  Generators
  Shop Tools
  Techniques Howto
Landscape
  Flowers Shrubs Garden
  Golf Course Maintenance
  Irrigation Systems
  Landscape Design
  Landscape Lighting
  Landscape Maintenance
  Lawn, Turf, and Grass
  Vegetable Gardening
Construction
  Caterpillar
  Komatsu
  Wheel Loaders
Current Events Health Happiness
  Current Events
  Dogs and other Pets
  Electronics And Computers
  Food
  Health
  Just For Fun Off Topic
  Movies Music Games
  Personal Finance Investme
  Sports Outdoors
Tractorpoint Site
  Member Photos
  Site Members
  Website Operations Howto


New As Posted | Active Subjects



Click to Post a New Message!

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

Page [ 1 ] | 2 | 3 | | Next >>
Reply | Pop Up Window Reply | Add PhotoAdd Photo
 07-01-2011, 16:15 Post: 179249
jnewport2



Join Date: Jul 2011
Location: Terre Haute, IN
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6

5
Filter by User
 3-point leaking down

I am borrowing a Tractor King JM200 2WD. I was driving it home from my friend's house and just as I pulled in the driveway, the 3-point lost pressure and dropped my box grader to the ground. I raised it back up thinking my hip hit the lever and it leaked back down. It was leaking pretty quickly, about 30-45 seconds from top to bottom. There was a small amount of hydraulic fluid leaking from a little set screw on top of the 3-point casing on the right side. If you were sitting on the seat, it would be right under your right hip. THe oil appeared to be boiling from this set screw (I did not notice a leak from anywhere else - and this one seemed to small to cause this kind of pressure loss). It leaked about 1 or 2 tablespoons of fluid. Since it was boiling, I thought maybe I was low on fluid and it got hot/thin causing me to loose pressure. I let it sit overnight, topped off the hydraulic oil in the 3-point sump, and tried it again. It was still leaking down, but much slower. No fluid leaking out. I used it for about a 1/2 hour and lost the ability to hold up the 3-point up altogether. Now when I raise it up, it lowers almost as fast as it raises. I really don't know how a 3-point works or where to start. Sounds like maybe I've lost a seal or o-ring that is keeping the fluid from holding pressure - but I have no idea where to start or what to look for. I did remove that little set screw on top of the casing, cleaned it, added teflon tape, and replaced it....I knew it was a long shot - and it didn't work. I don't think that leak is the source of my loss of pressure - though I wonder if there is an o-ring inside that has failed and the fluid is making its way to that screw. I just don't know how to find, check, where to start removing....etc. I have been all over the internet looking for schematics of how a 3-point hitch works and can't find much on a Jinma or Tractor King. I don't have an owner's manual. Any help with what my problem is, where to start, and what to do would be much appreciated. Pictures/diagrams would be AWESOME!

One more thing - I found on this site a forum about the pressure control valve and thought "no...it couldn't be that simple" It wasn't. I messed with the needle valve and didn't get any favorable results.

ideas? Thank you for your time and consideration!






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 07-01-2011, 18:07 Post: 179250
greg_g



View my Photos

View my Photos  Pics
Join Date: Jan 2004
Location: Western Kentucky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 1816

9
Filter by User
 3-point leaking down

There are thumbscrews on the lift lever linkage. My guess is that either they were not set properly, or you forced your way past them when you lifted the boxblade for transport. If/when the rear lift is raised too high, the O-ring and wiper(s) on the lift cylinder are damaged. Permanently.

But to be fair, some folks have had the thumbscrews set correctly - then unknowingly or unwittingly hitting a bump in the road during transport, which in turn raised the implement above the safe lift height. Result is the same, permanent damage to the lift cylinder seals.

By permanent, I mean it will leak permanently unless/until said O-ring and wiper(s) are replaced (some or all of items 15/17/19 on the diagram below)

//greg//





Picture Link
Jinma Farmpro Agracat: 3-point-leaking-down

Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 07-01-2011, 22:58 Post: 179255
jnewport2



Join Date: Jul 2011
Location: Terre Haute, IN
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6

5
Filter by User
 3-point leaking down

That makes total sense. I actually do remember misjudging a bump in the road and hit it pretty hard as I turned onto my road, I heard something - but figured it was just my box bouncing - so I would say this is my culprit! This was less than a minute before my box started dragging. Thank you! So a few questions:

1) Looking at this diagram (thank you for this btw), it looks like I would need to disassemble starting from the front plate. Would I just start with the front plate (14) and work my way in? Does that piston (or whatever you would call 16-19) just slide right out (or is it supposed to)? If so, this doesn't seem all that awful of a job. Is there any advantage to going through the back plate?

2) Where would I purchase the o-rings/rebuild kit and assuming I need to order online, what would I specifically ask for? Would it be as simple as "wipers and o-rings for the lift cylinder of a 3-point of a Tractor King JM200"? I get a little nervous without part numbers to verify with a parts person on the phone what I need - it is more my lack of official terminology. Know of anyplace that specializes in Tractor King parts?

3) Anything else I should know about the disassemble that I should plan for?

Thanks again for your help!






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 07-02-2011, 07:22 Post: 179256
greg_g



View my Photos

View my Photos  Pics
Join Date: Jan 2004
Location: Western Kentucky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 1816

9
Filter by User
 3-point leaking down

I've personally never had the need to perform that particular repair. But those who've had reported exactly as you describe; going in through the front. #16 however is the sleeve, I'm not sure that would actually have to come out. The piston is #18. The O-ring on the piston is #15 (metric , the wiper is #19.

What happens when the lift arms are raised too high, is that the piston gets moved partially beyond the lip of the sleeve. That exposes the O-ring and wiper. When the arms are subsequently let back down, the piston is pulled fully back into the sleeve. The O-ring and wiper are damaged as they're forced backwards through the lip. That's why I thought perhaps it might be prudent to have O-ring #17 on hand for the job. That said, the dealer may advise it's not necessary for that kind of mob.

As far as a parts source - any dealer that sells Jinma or any re-badged version of Jinma (FarmPro, NorTrac, etc). But over the years there've been several different lift boxes installed on the 200 Series. Unfortunately, the over-extension problem was never addressed in any of them. Although there was mention of a stop bolt in at least one of them. Anyway. As a result, most dealers will carry what they call a "lift cylinder repair kit". But which kit you need depends upon which box is on your tractor. Some pistons had more than 1 wiper, which is why I used "wiper(s)" earlier. So be prepared to tell the dealer the model year and serial number of your tractor. That info should be on a metal label glued either to the inside of a rear fender or alongside the transmission housing.

//greg//






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 07-07-2011, 22:36 Post: 179315
jnewport2



Join Date: Jul 2011
Location: Terre Haute, IN
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6

5
Filter by User
 3-point leaking down

I can't thank you enough for your help. I found a parts dealer online out of TX. They were very friendly on the phone - a smaller operation - which allowed for some real personal service. I asked the parts lady if I could speak to one of their mechanics and he helped walk me through what I would need to do. Between his directions and your picture, I was able to understand what I needed. Below is my experience for future readers:

I ended up taking off the back plate and the front plate. I started with the back to see if I could get to the piston from the back....can't without removing piston rod (27)- but I also wanted to check if I had a stop bolt. The drain plug for the oil located on the back plate and by removing the plate I was able make certain I get all the oil out. I do have a stop bolt - but it was mashed from a few too many hard bumps. It's hard to explain, but basically, the rocker (number 40) that is connected to the piston rod (27? - hard to read) is the part that hits the stop bolt. The connecting point almost straddles the bolt to where the actual contact point is on the outer 1/8" of both sides of the bolt....a few hard jolts and the stop bolt gets mashed out on the edge...allowing for an extra 1/8" of travel for the piston. Which I can attest - is too much.

Moving to the front, I had to remove the top of the gear box (where the shifter is located) in order to remove the front plate. I removed the front plate - it is kind of snug due to the o-ring (The first #15). I ended up using the oil left in the cylinder and pushed down on the 3-point (#30? - hard to read) to help push out the cylinder. It got it most of the way, but still had to work it out by hand a bit. All the oil made a mess....but had to get that oil out anyway. Having the rear plate off turned out to be necessary as I was able to push the piston out of the cylinder(16)with a piece of 1x1 wood. The cylinder is pressed in. Once out the o-ring (15)and neoprene rings (19) were easily replaced.(they were my culprit)

From there I just put it all back together.

The whole thing took less than 3 hours - and that was with my 4-year old "helping".

Pretty painless all-in-all....but next time I need to get the tractor.....I will use the trailer!!!






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 07-07-2011, 23:33 Post: 179317
greg_g



View my Photos

View my Photos  Pics
Join Date: Jan 2004
Location: Western Kentucky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 1816

9
Filter by User
 3-point leaking down

Great description. Too bad your initiation into the world of Chinese tractors had to be by way of fixing one !! But that's actually one of their attractions; that is, they're basic fix-in-the-field machines.

//greg//






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 07-07-2011, 23:58 Post: 179318
jnewport2



Join Date: Jul 2011
Location: Terre Haute, IN
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 6

5
Filter by User
 3-point leaking down

You are exactly right. "fix-in-the-field" is what I did and was easy to do. Or at least "fix-in-the-gravel-driveway." Plus the tools necessary are common amateur tinker-er tools.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 08-23-2011, 16:22 Post: 180005
johna1



Join Date: Aug 2011
Location: Tasmania,Australia
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 12

8
Filter by User
 3-point leaking down

quote
(Moving to the front, I had to remove the top of the gear box (where the shifter is located.)
was there much involved in removing the top of the gear box.Thats where i have to go.
john






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 08-24-2011, 10:12 Post: 180020
greg_g



View my Photos

View my Photos  Pics
Join Date: Jan 2004
Location: Western Kentucky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 1816

9
Filter by User
 3-point leaking down

Not at all. Just remove the hex head bolts and lift straight up. But be prepared to cut a new gasket. They usually tear when you lift the cover. And when you get to replacing the cover, just remember to align the lever(s) so that the finger at the bottom fits into the associated sliding fork before you bolt it back down.

//greg//






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 08-24-2011, 16:30 Post: 180031
johna1



Join Date: Aug 2011
Location: Tasmania,Australia
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 12

8
Filter by User
 3-point leaking down

Thanks for that greg_g.
Buti have found that something elce is wrong with it as i have got the lift working by turning the steering,so the lift must be ok.took it out yesterday and completly lost my steering.This thing is a nightmare.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
Reply | Pop Up Window Reply | Add PhotoAdd Photo


Page [ 1 ] | 2 | 3 | | Next >>

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

Thread 179249 Filter by Poster:
greg_g 9 | jnewport2 5 | johna1 8 |

 (advanced search)

Picture of the Day
pauljmtz

Other Tractor Brands - Foton ft404 black diesel splat out of exhaust
Foton ft404 black diesel splat out of exhaust


Unanswered Questions

Shibaura SD2203 rear axle oil
Mitsubishi MX55
Gator HPX ignition module
SL 1643
Removing LHS rear wheel beari
Gear Grinding 1200A - primary
Replacing a friction diskwashe
Bolens k1502 mitsubishi K3 ove


Active Subjects

Where Murf
Big country 4x2 utility vehicl
Operation
lift cylinder for 3pt hitch wo
Still have jerk in hydro
Flatulent gifts human and dog
front mount snowblower
Hydraulics Won t Work


Hot Topics

NorTrac Tractor Quality Review
Case 446 hydraulic pump
Long 460 hydraulic problem
Jinma Tractor w transmission p
Flatulent gifts human and dog
Generator set up ideas wanted
6X4 Gator Sometimes Shudders
Roof VP75 Brush Mower Manual


Featured Suppliers

Mountain Creek Labradoodles
      MountainCreekLabradoodles.com





New Forums on Gun Sport Shooting and Hunting -- BarrelPoint.com  New Forums on Horses ManePoint.com
Talk Horses at ManePoint
Hunting + Gun Sports at BarrelPoint



Most Viewed

+ Jinma Tractors Are They Worth It
+ Jinma 284 Ammeter 30 Amp fuse keeps blowing
+ JAPANESE or CHINESE
+ Rebuild Yang Dong Y385 Tractor Engine Settings Man
+ Anyone use a Jinma chipper
+ Jinma 224 Loader does not lift or tilt
+ Farm Pro 2420 won t start
+ Farm Pro 2425 4WD working
+ SHould i buy a JInma
+ Jinma 200 LE tractor dies will not start

Most Discussion

+ New Chinese Tractors Board
+ Clutch for 354 Jinma
+ Jinma 200 LE tractor dies will
+ Jinma 284 Ammeter 30 Amp fuse
+ JAPANESE or CHINESE
+ Farm Pro 2420 won t start
+ Jinma clutch does not disengag
+ Agracat Tractor
+ Jinma Tractors Are They Worth
+ backblading snow

Newest Topics

+ jinma 254 hydraulics belching out the ovreflow
+ Agracat 3720 Magnum Clutch Issues
+ farm pro 2420
+ jinma 284 has no power to anything
+ jinma 284 has no power to anything
+ Nortrac 254 will not start
+ Nortrac 254 will not start
+ fan and cooling
+ Jinma 254 Hydraulics foaming
+ farm pro support
















Turbochargers for Tractors and Industrial Machines
Cab Glass for Tractors and Industrial Machines

Alternators for Tractors and Industrial Machines
Radiators for Tractors and Industrial Machines

Driveline Components for Tractors and Industrial Machines
Starter Motors for Tractors and Industrial Machines