Oil & Fuel TC30 hydraulics-Brain Picking...

   / TC30 hydraulics-Brain Picking... #1  

Dartagnan

Bronze Member
Joined
May 19, 2004
Messages
63
Location
Oakdale TN
Tractor
NH TC30 Woods1009ldr
I've been having a problem with the filter (small one on the left) leaking around the seal. Bad enough to see the oil on the ground and wonder what those stripes were in the yard... It started last winter during a cold snap. I ,at the time, thought it was just due to the temp of the oil and my failure to warm up. Come spring I did a filter and oil change. Did not cure the problem. I crushed one filter getting it on too tight. So I know it's not the filter. I am using the tsc universal oil, could that be the issue? At this late date I can't remember if the large filter was changed just before the prob started or after. Could it have a problem that is causing over pressure?

Any help would be greatly appreciated.

Dartagnan
 
   / TC30 hydraulics-Brain Picking... #2  
Dartagnan, you have an HST tractor, don't you? There is a special ruggedized filter for HST tractors for winter use when charge pump pressure is higher than normal. Many tractors have experienced blowout of the filters. Check with your dealer for the special filter. I believe the part number for that filter is SBA340501030, but I'm not 100% sure. It's a few dollars more ($7 or $8) than the normal filter.
 
   / TC30 hydraulics-Brain Picking... #3  
+1 if this a charge pump filter it must be a heavier duty than normal spin-ons.
 
   / TC30 hydraulics-Brain Picking...
  • Thread Starter
#4  
jinman said:
Dartagnan, you have an HST tractor, don't you? There is a special ruggedized filter for HST tractors for winter use when charge pump pressure is higher than normal. Many tractors have experienced blowout of the filters. Check with your dealer for the special filter. I believe the part number for that filter is SBA340501030, but I'm not 100% sure. It's a few dollars more ($7 or $8) than the normal filter.

Yes it is hst. Will try the new filter next trip by the dealership.
 
   / TC30 hydraulics-Brain Picking...
  • Thread Starter
#5  
Well, it's been a weekend.... dropped front tires of a little ledge and hung the steering cylinder up. Bent the rod. Didn't realize it until it was stuck going around in circles. So three trips back and forth to the shed for all the right tools to take the cyl off the tractor later(not too bad only 1500 ft or so each way...just time consuming) Go inside and log on to Messicks....484$ for new cyl. Holy !@#$. So back to the shed to see about repairs. There was So much side pressur on the gland I couldn't get it out. Had to use the porta power to re extend the cylinder. That let me unscrew the gland end. (after I found a set of tips for the split ring pliers that were not so worn (or H frieght) out that the didn't just slip out of the ring). I have a 2 car garage worth of shop tools stuffed into a 10 x10 shed. Finding some of those seldom used tools can take a bit of time...it's rapidly reaching the point to where a shop/barn/garage is going to be more important than eating. Anyway, took the rod over to the Neighbors 20 ton shop press, used some rags to pad the ends and started applying pressure. I did not get it perfect but it's within a couple hundreths. Take it back to the house, re assemble cyclinder. Moves in and out by hand with no stiff spots, so back through the woods to the tractor we go. Reinstall, crank tractor to check cylinder end for leaks and bleed system. Standing next to the tractor turning lock to lock and it wasn't until I mounted up and tried to go back to the barn that I realized I had hooked the lines up bassackwards. DUh! About now I realize the filter seal is taking another break and letting all my fluid pump onto the groud again. If I idle all the way down it stops pumping, still dripping but not pumping so I creep back to the shed slower than I could walk. Steering backwards is more difficult than you would think. Back to Messicks to look at some diagrams to see if I cn figure out where the restriction might be. OIl comes from lower mid section to filter mount, thru filter, out front (all metal lines til 2inch rubber hose, cooler, 2inch rubber hose, metal line back to filter mount, where it is spliced to another metal line with rubber hose, then back to upper side of midsection. So first thing I did was verify that the oil I had in it met the specs for multi g134. It does. Now I'm no engineer but in my experience you do not use hose clamps in a high pressure line, and if the restriction was somewhere after those 3 pieces of rubber hose, they would most likely leak prior to the filter seal? So looking at the diagram I see a check ball and spring is under the outgoing banjo fitting. What the hey who knows. So I clean it up with some brake cleaner, unbolt the banjo and pull the ball out. No it didn't act like it had been stuck or anything. re assembled, cleaned filter and seal, screwed it back on to contact plus 3/4 turn. Crank and check for leaks. Dry at idle so wind it up to pto speed...still dry...hmmm... move forward, backward, hold brake while trying to move...still dry....back to the wood to do some more fel work, 2 or three hours later and several dozen dismounts to verify still dry...I'm not leaking. Neither is the power steering cylinder btw! I'm going to keep watching it tho.
 
   / TC30 hydraulics-Brain Picking... #6  
Can't say much about the PS cylinder repair except good job.:thumbsup:

The HST filter can have 250 to 300 psi when the fluid is cold. Actually, the ball check valve is to allow HST cooler bypass when the pressure is high. That keeps from having an exploding HST cooler and hoses. My guess is that you got a much better seal on the filter when you re-installed it this time. I'm sorry you are having such a hassle, but Messicks should be aware of the special filter since they list two of them on their website and the one # I gave is the more expensive filter, so I think it's the ruggedized one.

With your filter, I'd say you should check it on a cool/cold morning. If it holds then, you are probably good to go. I remember the first time I changed my HST filter. I thought I'd never get it off. I was sure a gorilla had tightened it at the factory. In my experience, this filter needs to be much, much tighter than an engine oil filter that only sees 60-65 psi maximum.

I'm glad everything worked out, but sorry for all your grief. Maybe next time will be more pleasant.:)
 
   / TC30 hydraulics-Brain Picking...
  • Thread Starter
#7  
Hey thanks Inman, all good in the end...Got some seat time after all. I'm "cleaning" the back corner of the property, maybe 3/4 acre, the brush is so thick you cant walk thru it, down in a little holler. Been on my to do list since we bought the place. Had some time and energy this weekend. (amazing how those two items seem to match up less and less as I get older) The terrain makes things "interesting" at times, thus the bent steering cyl. Found three more 60+/- foot yellow pine that the beetles got 9-10 years ago. Good thing I got close to 120 foot of chain and snatch strap....those things scare the bejesus out of me. Bark falls off just when you drive by at 20ft. Project for next weekend.
 
   / TC30 hydraulics-Brain Picking...
  • Thread Starter
#8  
Just some follow up info for you guys...

Filter continued leaking almost every time I used the tractor. Did some research here and on my receipts, realized that this issue did not start until I did the 300 hour service with...you guessed it..tractor supply universal fluid. So went to the somewhat local dealer and picked up a winter filter(pretty sure that was what i had on it but cant find the reciept) and 10 gallon of 134 multi g. 1.5 hours travel and 2 hours work later...no leak. dry on start...wait 5 minutes crank to pto speed and still dry. Kind of knew it was the issue as soon as I picked up the 5 gallon bucket of 134, noticable difference in the weight compared to the universal stuff. Moral of this story? The 50 bucks I saved on fluid ended up on the ground anyway, plus I had to do the work twice....use the oem recommended fluids and filters.
 
   / TC30 hydraulics-Brain Picking... #9  
Just some follow up info for you guys...

Filter continued leaking almost every time I used the tractor. Did some research here and on my receipts, realized that this issue did not start until I did the 300 hour service with...you guessed it..tractor supply universal fluid. So went to the somewhat local dealer and picked up a winter filter(pretty sure that was what i had on it but cant find the reciept) and 10 gallon of 134 multi g. 1.5 hours travel and 2 hours work later...no leak. dry on start...wait 5 minutes crank to pto speed and still dry. Kind of knew it was the issue as soon as I picked up the 5 gallon bucket of 134, noticable difference in the weight compared to the universal stuff. Moral of this story? The 50 bucks I saved on fluid ended up on the ground anyway, plus I had to do the work twice....use the oem recommended fluids and filters.

Another case where "just as good" isn't good enough.
SBA340501030 is the current regular-duty hydro filter. We haven't seen many filter problems since this part number was introduced. SBA340500980 is, I believe, the p/n for the cold weather hydro filter. It is more than several dollars more expensive than the SBA340501030 filter and should be considered in SEVERE cold climates and in instances where filter seal leakage is a problem. We used to sell a dozen or more of the 980 filters each winter, but haven't sold more than two in the last 24 months.
 

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