Lost Steering on my 1850

   / Lost Steering on my 1850 #41  
The o-rings were all dried out and hard in mine. The cylinders' removable ends had a gouge in them - not sure if from when they were made or if the marks occurred when they had been rebuilt once before. Mine is a 2003 that I bought used. If your o-rings have not gone hard, then you might want to hone your cylinders next time if you have not been doing so.

Ken
Well did you get it going? Hope so, some times on cylinders that have a screw on cap they will take a chisel and or punch and make an indention to keep it from backing back out but that wouldn't be a very big gouge, just something that a few strokes with a three cornered file can take out if it needs rebuilt.
 
   / Lost Steering on my 1850
  • Thread Starter
#42  
Yes, it works well. Did a bunch of minihoe work with it which must be hard on a tractor - lots of leverage causing strain.

Ken
 
   / Lost Steering on my 1850 #43  
Ksimolo,
Glad you got your PT back to work without having to shell out for new cylinders like I had to. How many ours between a rebuild on these cylinders for your PT?
I've got CNC mills and lathes and can help out machining for your cylinders (cost of shipping them back only) when I get back in country.
 
   / Lost Steering on my 1850
  • Thread Starter
#44  
Hi PT1445Farmer,

Thanks. I do not think that it is not too bad. My guess is that age of the o-rings was as much of an issue as anything - they had turned hard and were deformed. The rebuild is pretty easy - first one took 45 minutes partially from taking pictures, the second was less than 15 minutes. I just need to find a hone that can go smaller than 2" but hopefully with bigger stones than the brake cylinder ones. Saw some reasonably 2" - 7" ones for less than $30. I have put 300 hours on the tractor, I think - will have to go back and look. It had 430 hrs on the meter when i got it - 430 hard hours.

Got my camera working again so I will shoot for better pictures next time when i am doing it by myself.

Ken
 
   / Lost Steering on my 1850 #45  
15 minutes for a rebuild is good news. Seems I will be needing that rebuild kit and much more because...
MY PT is toast again!!

Was lifting with the forks and suddenly saw oil squirting from the reservoir - so it appeared. Quickly dropped my load from the forks and backed up. No leaking. Ran fine for a while.
Mowed for about 90 minutes with some struggling through tall grass but got the job done. Then the thing would not move. Dead. No forward, backward or anything. The lift still works. Just no movement.
Unbelievable. Must have been something from my earlier repair, though it seemed fine at the time.
 
   / Lost Steering on my 1850 #46  
Huh? Wha? Squirting from the reservoir? Can you be more specific? There is the tank, but I do not know of any reservoir... Got some pix?

There could be a few different reasons for this, brakes, bypassing.. But first lets see what this spurting is all about...
 
   / Lost Steering on my 1850 #47  
Hello WF - I am going to start a new post because i do not want to hi-jack this one.

To ksimolo - if you need a hone set-up of almost any kind, I have it. Let me know and I can ship it to you.
 
   / Lost Steering on my 1850 #48  
Carl,

Hydraulic stowage tank, and reservoir are the same thing. If your engine cover is down, where do you see oil coming from, or is this with the cover up?
 
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   / Lost Steering on my 1850 #49  
marrt,

If those hyd cylinders were done correctly, they should last a good while. However, if a nick or cut occurred when reinstalling the piston assembly, or wrong o-rings, or incorrect direction of some seals, would give a short life. Did you rebuild those cylinders yourself, or have them done. If a shop did them, they should have tested them at some higher pressure than what is normally used, and state that on the bill. What kind of fluid are you using in the hydraulic system?

Someone mentioned about the o-rings broken and some pushed out of the groove. What would happen in that case, is that the pressure of the fluid would try and push the piston over to the side, further compressing the o-ring, and allowing more fluid to pass by, and the particles smaller than 10 microns would be wearing down spots on the cylinder wall. If an inside tube micrometer were used to measure the tube for true roundness, you might have cause for obtaining another cylinder. I have no idea what the tolerances would be.
 
   / Lost Steering on my 1850
  • Thread Starter
#50  
Hi PT1445Farmer,

the hones with 2" stones that i found did 2" - 7" cylinders. I think the ID of ours are more like 1 3/4". What would be ideal is something that did 1 1/2" - 5" with ~2"stones. If you know of a reasonable source for something like that, i would like to buy one to have on hand when i needed it. That size could be used for the PT up to a heavy duty log splitter cylinder.

Thanks,

Ken
 

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