3-Point Hitch nortrac NT204C

[kstred]

Hello. I just bought this tractor used and it runs great. When I bought it the owner told me that there was an issue with the 3pth leaking down. Well I thought that meant it leaked slowly which it did until i put a load on it then it leaks down quickly. I am sure it is a seal or an oring somewhere but where? It raises fine.

 

[Grommit]

Sounds like the same problem I had with my Siromer where I over raised the 3PL without a load - the piston came out of the hydraulic cylinder and then damaged the o ring seal upon lowering - easy fix with a seal kit but just a bit messy with all the oil involved.

You will need to remove the seat and hydraulic oil reservoir cover and then raise the 3PL as high as you can, the rest will be self evident once you get going.

Might be best to wait until a superior member diagnoses the problem however as I am just a forum newcomer and have not touched the "holy cloth" of the senior members:laughing:

Have fun

 

[Rich Waugh]

I'm not familiar with the 200 series Jinmas, but my 304 Jinma has a knob on the front of the lift box just below the seat. That knob controls the rate at which the TPH drops. It has a set screw to lock i, which you have to look hard to find and then loosen before trying to turn the knob.

Rich

 

[Affordable]

Sounds like you need to rebuild the 3- point lift cylinder, not a hard job and the kit is pretty cheap

Let me know if we can help on the kit


Tommy
Affordable Tractor Sales Co
"Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[kstred]

Well sounds like I need to tear it apart. I tried the knob already that doesnt help. The rings sound more plausible as the previous owner told me he actually took the arms out and rotated them down one notch on their spline so they would go lower to the ground. This probablly damaged the rings. So I need to take the seat off and the hydraulic cover off to see what I need to do? I thought maybe it was a seal in the box where the shift lever goes in. Any ideas where I can get a service manual for nortrac tractors. Hey affordable you have the seal kit for nortrac?

Thanks for all the help!

 

[Affordable]

Yes I have the kit,you do not have to take the seat off,you remove the rear cover where the top link goes,and the front cover where the draft control knob is,you can then take the piston out and replace the o-rings,you can always give me a call if you have a question

Parts you need are a 200 series 3-point repair kit,rear cover gasket,you to my website under 200 series Jinma you should find what you need


I have the manuals also you will need a 200 series parts book,200 series operation manual,Y380 engine parts book




Tommy
Affordable Tractor Sales
" Your Jinma Parts Superstore"
www.affordabletractorsalesco.com

 

[quicksandfarmer]

Tommy --

Is the 300 series the same procedure? Also, do you need to drain the hydraulic fluid?

 

[Affordable]

The 300 series is a little different,plus they used several different lift boxs and yes you have to drain the hydraulic fluid.

The o-rings and wipers are on the internal piston,also on the 300 series there is a plastic stop ring that does not come in the kits.

Tommy
Affordable Tractor Sales
"Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[sphuddle]

The 300 series is a little different,plus they used several different lift boxs and yes you have to drain the hydraulic fluid.

The o-rings and wipers are on the internal piston,also on the 300 series there is a plastic stop ring that does not come in the kits.

Tommy
Affordable Tractor Sales
"Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

Tommy

I believed I may have talked with you on the telephone. I have a Nortrac with a pto problem. I tried to fix the pto cylinder thinking that it had blown the seal. I tried every way in which to see how I can get to it. I think I might have damaged it, I was trying to remove the rear coupling out of it and I believe that I sheared off the set pins that hold the spring in a certain position. It looks as though I will have to completely remove the whole housing and flip it upside down to get the cylinder casing out of the housing in which it is bolted through the bottom. I can't get the coupling to thread back onto the linkage that feeds through the housing. I really can't believe that there isn't a way in which we as owners of these tractors can get a service manual in which it actually shows you how to tear it down to repair it. The companies which sell these tractors should work with the manufactures to help the owners get these service manuals.

Thanks Stanley

 

[Affordable]

Sorry ,there are no service manuals, you are loosing me on what you are trying to do,give ma a call I will try to help


Tommy
Affordable Tractor Sales
"Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[sphuddle]

Tommy

I believed I may have talked with you on the telephone. I have a Nortrac with a pto problem. I tried to fix the pto cylinder thinking that it had blown the seal. I tried every way in which to see how I can get to it. I think I might have damaged it, I was trying to remove the rear coupling out of it and I believe that I sheared off the set pins that hold the spring in a certain position. It looks as though I will have to completely remove the whole housing and flip it upside down to get the cylinder casing out of the housing in which it is bolted through the bottom. I can't get the coupling to thread back onto the linkage that feeds through the housing. I really can't believe that there isn't a way in which we as owners of these tractors can get a service manual in which it actually shows you how to tear it down to repair it. The companies which sell these tractors should work with the manufactures to help the owners get these service manuals.

Thanks Stanley

Hey Guys

Here is an update on that cylinder that lifts the bush hog. I have tore it down, however I had to put a least 40 pounds of pressure to blow out the piston. The seal and scraper look okay, that is they don't look damaged. The piston wouldn't come out all the way because the cylinder is located to close to the shaft casting where the shaft that connects to the levers that come out of the reservoir box. Would there be something else like a relief valve located in the system that could be stuck open. The pump still lifts the front loader. It is super clean in the reservoir and the filter isn't clogged.
What else would keep the system from working. I looked on the shaft and nothing is stripped. I just can't tell what the problem is.

 

[quicksandfarmer]

There is a relief valve.

 

[RonMar]

There is a relief valve in the 3PH control valve. look for a square headed plug on top of the 3PH control valve. Under that plug you will see some washers and a spring and below that a valve plug that sets on a valve seat... If that was not seated fully, I think the 3PH would leak down. A way to check and or isolate this problem is to raise the 3PH, then screw that speed regulator valve in front of the seat all the way closed. This should seal off the 3PH cylinder and isolate it from the 3PH valve. If it still leaks down, the problem is most likley in the 3PH cylinder. If it does not leak down, then the 3PH cylinder is OK, and the problem exists in the 3PH control valve and or it's associated relief valve...

 

[sphuddle]

Tommy

I believed I may have talked with you on the telephone. I have a Nortrac with a pto problem. I tried to fix the pto cylinder thinking that it had blown the seal. I tried every way in which to see how I can get to it. I think I might have damaged it, I was trying to remove the rear coupling out of it and I believe that I sheared off the set pins that hold the spring in a certain position. It looks as though I will have to completely remove the whole housing and flip it upside down to get the cylinder casing out of the housing in which it is bolted through the bottom. I can't get the coupling to thread back onto the linkage that feeds through the housing. I really can't believe that there isn't a way in which we as owners of these tractors can get a service manual in which it actually shows you how to tear it down to repair it. The companies which sell these tractors should work with the manufactures to help the owners get these service manuals.

Thanks Stanley

Hey Guys

Finally got the lift fixed. What took 3 weeks to do, could have taken me 4 hours. I took pictures of the tear down to make sure that I rebuilt it the way I tore it down. It wasn't very complicated, however it did take take some reasoning to figure out why the engineers decided to make something like this. I didn't take the reservoir of the tractor. I thought I would see if I could replace the cylinder seal. It was still good. It took 40 pounds of air pressure to get it out of the cylinder housing. This tractor only has around 67 hours on it, and I find it amazing that the part that I removed had rust on it. This part fits into the block housing that operates the stem which has the oil by pass ports. The controls where useless because the stem had stuck inside of the cylinder. The spring wasn't strong enough to push the stem back out to to touch the controls. In essence the oil was by passing the lift mechanism acting more like a relief valve. Here are some pictures in which you will see the parts that got stuck. After looking at the last picture you will notice that the stem is sticking out about 3/4 of inch. When I first started working on it I didn't know that it was stuck and needed to be out this far. It was push flat to the block. I hope this will help anyone else that is having a problem. I really can't explain why it has rust in it. I took a brass wire brush and to the cylinder and 1000 grade emery cloth to the stem. Thinking that I found the problem I re-installed everything and it started working again.

Stanley

 

[Circle G Tractors]

Stanley, we have seen this happen before on the 200 series more often than the 300 but glad you got her figured out.

Ben
Circle G Tractor Sales, Inc.
Jinma Tractor Parts, Farm Pro Tractor Parts, Farmpro, Nortrack, Agracat

 

[greg_g]

This tractor only has around 67 hours on it, and I find it amazing that the part that I removed had rust on it.

Hydraulic fluid is hydrophobic, which means your hydraulic fluid has been contaminated with water. When oil and water are combined with heat and vibration, they form an emulsion, sorta like a sticky foam. That crud will be sticking to any interior parts of the hydraulic system that are not keep clean by regular flow. Unless you get rid of it, it will continue to contaminate. You should perform a thorough flush with kerosene before refilling with fresh hydraulic fluid.

//greg//

 

[Circle G Tractors]

We flush all of our new units when they come in, the fluids are much better than they used to be but we still take that precaution.

Ben
Jinma Tractor Parts, Farm Pro Tractor Parts, Farmpro, Nortrack, Agracat