NH TC33DA Hydraulics leak: Diesel Fuel Lubrication Engine Additives  -- Tractor Maintenance Discussion Forum and Review NH TC33DA Hydraulics leak: Diesel Fuel Lubrication Engine Additives -- Tractor Maintenance Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Diesel Fuel Lubrication Engine Additives Forum

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 12-15-2007, 19:13 Post: 149340
tom21769



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 NH TC33DA Hydraulics leak

I have a New Holland TC33DA, HST & SuperSteer, 149 hours on it. Complete newbie to hydraulic systems (my previous tractor was an old 8N).

I started it up this morning in 31 degree weather.
After operating for about 10 minutes, I noticed fluid spurting down around the HST filter. I assumed it was coming out of the filter and replaced the filter. Went to top off the hydraulic/tranny oil and was surprised it took 2 1/2 gallons to come up to level.

Re-started the tractor. After about 5 minutes, fluid is spurting all over the engine compartment. It is about the color of butter, and seems to be coming out of the left side of the shoebox-sized part that looks like a small radiator. Would this be a hydraulic fluid radiator that has blown a leak?

I had lept this tractor in my garage its first year. Last few months it's been out in the weather. I suspect moisture has gotten into the hydraulics.

Can anyone tell me what I seem to be dealing with, and how to fix? The radiator where the leak is appearing looks like it'd be easy to replace.






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 12-15-2007, 20:55 Post: 149345
earthwrks

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 NH TC33DA Hydraulics leak

If you mean the oil cooler in front of the radiator, then yes there are two rubber hoses that tend to leak or break. I'm on my second set and these are ready to go. There's a lot of vibration that wreaks havoc on them. Easy to replace--but check that the clamps aren't loose first. There will likley be tell-tale oil misting down the radiator. Use some engine degreaser and get it off there as it will really pick up dust and clog the radiator and hot hot which could casue damage to the engine block, gasket or head.

The butter-like oil could be that is is very cold and tends to get air in it like whipped butter (same principle of air in the butter to make it light) AND/OR the level was so low that you were picking up mositure (which is typically always in the system in the reservoir which is the trans and axle. You might want to drain it and start fresh. Don't use the cheap universal hydraulic oil to fill it--buy the stuff made for it at the dealer --it's much thinner and won't be slow to warnm up.

Why the filter blew, I'm not sure---I use the universal oil in my TC33D with no unusual effects, other than it takes a little longer to warm up. The fluid in your fliletr and systen in general may have had so much water it that it froze and the pump blew it out. Try changing the fluid to the thinner stuff and buy the filter from the NH dealer, NOT an autoparts store---guys here have found that they don't always work and do blow out like you found.


Feel free to write back in with more questions, or the solution.






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 12-15-2007, 21:07 Post: 149346
tom21769



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 NH TC33DA Hydraulics leak

Thanks for your detailed reply.

Yes, that would be the oil cooler in front of the radiator I'm talking about.
I looked up the part on the NH web site.
But the oil is not coming from broken hoses, it is spurting from the front of the cooler itself. I suppose that means the whole cooler needs to be replaced.






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 12-15-2007, 21:27 Post: 149347
earthwrks

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 NH TC33DA Hydraulics leak

I'm not sure if the oil cooler is down or up stream from the pump or the filter, but to me it sounds like maybe just maybe too much water in the system froze and split the cooler. I'd be tempted to remove the cooler, carefully sand or wire brush off the paint at the leak and see if it can be soldered, silver-soldered or brazed---take it to a radiator shop for best results. My gut feeling is that's about a $150 cooler if not more (I'm guessing as my formula for NH parts is: take the value of what you think it will cost and then---double it Smile .

And don't run the machine until you get all that bad oil out which may take 3 or 4 complete and total fluid and filter changes. Water in the system will also wipe out the aux. pump and hydrostatic pump and motor which could be $3000 or more to repair. Not to mention causing rusting inside the trans and the rear axle on bearing and wera surfaces.

You mentioned you had an 8N--I had a 2N before this NH and it had "rustcicles" hanging down inside from the seat cover over the trans which is over the hyd. pump. A 2" long rustcicle broke off and got lodged inside the pump housing. $500 in parts later I got it working again. And it was because there too much water in the system.






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 12-16-2007, 09:19 Post: 149352
tom21769



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 NH TC33DA Hydraulics leak

How about adding a bottle of Iso-Heet (water remover) to the cheap oil I use to flush the system? The iso-Heet (red bottle, not yellow) is compatible with diesel fuel so I suppose it is compatible with hysdraulic/transmission oil.






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 12-16-2007, 12:32 Post: 149354
earthwrks

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 NH TC33DA Hydraulics leak

Do that, then call me right away. I'll bring a trailer and $100 cash, 'cause after that, that's what it'll be worth.

That stuff doesn't remove the water--it helps combine it with the fuel so it can be burned. Those chemicals will surely destroy the seals and anything rubberish in the system.

You need to physically remove the water droplettes from the system by draining and flushing with new.

Do I still need your address? Smile tehehe






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 12-16-2007, 16:57 Post: 149356
tom21769



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 NH TC33DA Hydraulics leak

>>Do I still need your address?

Well, I hope not!

I can appreciate what you're saying about the rubber parts. The idea was not to toss in a bottle of additive and be done with it, but to add it, let it absorb the moisture, then drain.

Iso-Heet is just isopropyl alchohol. Once drained and refilled with high quality oil (w/o additive), I would think any remaining alchohol would be too diluted to damage the seals. But maybe any advantage in absorbing the moisture is outweighed by the risk of not getting enough of it out. The system holds nearly 9 gallons, but I won't be able to drain every drop of that.

I do hate the thought of flushing 18 gallons or more of oil through the tractor, if there is some way to get all the moisture out with just one drain.






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