Jinma 284 Steering Question

   / Jinma 284 Steering Question #11  
+1, the lines shouldn't drain too much when disconnected. Also the cylinder is full of fluid which will come out when you push/pull on the rod end so have a bucket under the ports to push the fluid into once it is disconnected. It is probably best to get the rod end disconnected before you disconnect the hydraulic lines...
 
   / Jinma 284 Steering Question
  • Thread Starter
#12  
Well Ron, unfortunately I did not see your post before disconnecting and taking apart the cylinder, I managed to squirt oil all over myself and my garage when I pushed on the rod! Hindsight, of course it would have done that, oops!

So I did manage to get everything disconnected and the taken apart, I have a couple questions that hopefully having some pictures will help.

First, when I was taking the cylinder off the tractor, is there a way to do it without completely destroying the rubber cover? I got fed up holding it back and decided to just cut it off, of course that was before I realized a new one was $20! Either way I don't know if I could have gotten it off without cutting it.

Second, on the right hand side (if you're sitting on the tractor) should you be able to disconnect the section highlighted in red? No matter what I tried I could NOT get it off so I ended up taking the entire plate that it is connected to off. Even after it was disconnected and put in a vice I could not remove it, even hitting it with a hammer (using a board to protect the threads) it would not budge.

steering cylinder 1.jpg

Next, in this piece it looks like there is a slot for an O-ring and there definitely was not one when I took it apart, I assume there is supposed to be one here?

steering cylinder 2.jpg

Also, the rest of the seals seem like they may have been replaced at some point, they are blue gaskets that look relatively new, all the replacement kits I am seeing are blue were the original ones blue as well? I don't see any obvious signs of damage on any of the other seals, they actually all look quite good. Should I still go ahead and replace all the seals or just the one that I assume is missing?

Thanks again for all the help! I would never have attempted this without this message board!
 
   / Jinma 284 Steering Question #15  
   / Jinma 284 Steering Question
  • Thread Starter
#16  
OK, what about the groove inside the piston is that supposed to have an o-ring?

In this picture it looks like there is supposed to be one (or possibly 2??) inside, mine had nothing at all when I took it out.

480_5side.JPG

If there is supposed to be one, do you know what size it is supposed to be? I should be able to find it locally hopefully if so.

Thanks!
 
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   / Jinma 284 Steering Question
  • Thread Starter
#17  
So I am out looking at my tractor again was going to disconnect and clean the diverter valve to see if that solves the problem and for the life of me I can not find it. Everything I have read said it should be by my right foot when sitting on the tractor, is this correct?

I am not finding anything on my tractor that resembles any of the pictures I am seeing online of the diverter valve.

When I trace the hydraulic lines from the steering cylinder back I see it connect to hard lines, which then in turn connect to the base of the steering column.

IMAG0578.jpg

From that, two other lines come out, one attaches to what looks like the hydraulic pump and one attaches to what looks like some sort of reservoir in front of the radiator. The reservoir then also connects back into the pump. The one it is connected to is the one on the left in the picture.

IMAG0577.jpg IMAG0576.jpg

Is it possible that there are 2 separate pumps, one for the steering and one for the 3-point hitch and the loader? It looks like the 3-point hitch valve connects directly to a line that is connected to the valve for the bucket loader.

Is this correct or did someone seriously screw up the hydraulics when assembling the tractor? If it is correct, could it be that I just need to put some hydraulic fluid in that reservoir at the front of the tractor? It doesn't have a dipstick or anything, when I unscrew the cap I just see a screen in the cap for filtering whatever goes in there, similar to the one when you open the fuel tank.

Thanks!
 
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   / Jinma 284 Steering Question #19  
   / Jinma 284 Steering Question
  • Thread Starter
#20  
Any idea how full the tank should be? Unlike the other hydraulic tank in the rear it doesn't have a dipstick or anything. Should I just fill it up almost to the brim?

I'm going to try to put it back together and top off that tank and will report back.

Thanks again guys!
 

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