I have a New Holland TT75A made in 2008. The front bucket went from great to less than great to barely to nothing. I thought perhaps it was the valve and replaced it; nothing. I then figured it had to be the hydraulic pump as, when I bought it for $5,000 from the lady next door, I didn't know the history but know it had some rough use. It ran great, though and that price was quite a steal. I ordered a new hydraulic pump, generic, and finally removed the old pump. The nut had come off the old pump and the gear had sheared the keyway. After retrieving all the pieces, looking back, I should have just put it back together and likely all would have been fine. No, I had a brand new pump and when I went to install it, the inlet/outlet ports were in the wrong orientation. Youtube told me to simply swap the gears and it would be fine. After installing it, I fired up the tractor and nothing happened, only the bucket would operate in one direction. The lift arms should have taken primary over the valve and they did not move. I continued to run the tractor until a few minutes passed and I was thinking air...all of a sudden, oil burst out of my dip stick onto the exhaust causing a smoke cloud. I shut off the key and the tractor continued to run so I put it in gear and choked it down. I let it sit for an hour and it would barely turn a little, not completely. After backing up and scratching my head, I determined several things which were basically the loss of brain cells. 1) By swapping the drive gears in the pump, I reversed the rotation. The movement of the bucket in one direction was caused by the suction side of the pump. The high pressure blew the pump seal and filled my crankcase with hydraulic oil. I let it run too long and now oil is in the cylinder(s). On a good note, I drained the oil and replaced the new pump with the old one, after sitting for a week, the engine will turn over. I'm wondering, after letting it sit for another week, is it possible that the engine will start. A horror story of my own making.
Roadworthy
Elite Member
If the engine starts (and it probably will) expect a cloud of smoke until the oil burns out of the cylinders.
Thank you for the input; makes me feel better.
Hopefully you didn't damage anything. I just copied this over in the "repairs" section where you may get better results.
www.tractorbynet.com
Now that you are here, you will find some of the members more knowledgeable than YouTube. At the very least, if somebody gives a bogus answer they will get called out.
If you haven't done so already, drain all of the fluids and change them. Before trying to start it, pull the injectors and crank it over to blow the cylinders clean.
You were smart to shut it down the way that you did. I have heard of somebody overfilling the crankcase in their pickup and not been able to shut it down. They let it race until the engine blew up.
Oh yeah, Welcome to TBN!
Hydrolic oil hydrolock
A new member just posted this in owning/operating. Although I know I'm being redundant, I thought he might get better results here. https://www.tractorbynet.com/forums/threads/hydrolic-oil-hydrolock.541804/
www.tractorbynet.com
Now that you are here, you will find some of the members more knowledgeable than YouTube. At the very least, if somebody gives a bogus answer they will get called out.
If you haven't done so already, drain all of the fluids and change them. Before trying to start it, pull the injectors and crank it over to blow the cylinders clean.
You were smart to shut it down the way that you did. I have heard of somebody overfilling the crankcase in their pickup and not been able to shut it down. They let it race until the engine blew up.
Oh yeah, Welcome to TBN!
I appreciate the comments, though I've learned the hard way that it's better to ask the ones who know. Everything you've said, I've already done but haven't refilled the hydraulics yet. That's this weekend, I'll let you know what happens. Thank you again for the input.Hopefully you didn't damage anything. I just copied this over in the "repairs" section where you may get better results.
Hydrolic oil hydrolock
A new member just posted this in owning/operating. Although I know I'm being redundant, I thought he might get better results here. https://www.tractorbynet.com/forums/threads/hydrolic-oil-hydrolock.541804/
Now that you are here, you will find some of the members more knowledgeable than YouTube. At the very least, if somebody gives a bogus answer they will get called out.
If you haven't done so already, drain all of the fluids and change them. Before trying to start it, pull the injectors and crank it over to blow the cylinders clean.
You were smart to shut it down the way that you did. I have heard of somebody overfilling the crankcase in their pickup and not been able to shut it down. They let it race until the engine blew up.
Oh yeah, Welcome to TBN!
And if I misspelled hydraulic, that was a typo!
RayIN
Platinum Member
- Joined
- Sep 10, 2024
- Messages
- 702
- Tractor
- 2002 MF 451
It's difficult to fill the compression area of cylinders with oil accidentally. Since the crankcase is not sealed, I doubt you have any mechanical damage.
I'd leave that hyd. pump disconnected until you get the tractor engine problems resolved.
You've already received the best advice, best of luck with your tractor.
I'd leave that hyd. pump disconnected until you get the tractor engine problems resolved.
You've already received the best advice, best of luck with your tractor.
Well, He must have been smiling down on me. I re-installed the original pump after removing the new pump and installing the components on the old one. After filling the hydraulic reservoir, I turned the key and hoped for the best. The tractor turned over a few times but a bit slower than normal. I stopped and let it sit for another 30 minutes, turned the key and it fired up! So much smoke, it was impossible to see the tractor, but after about 15 minutes, the smoke cleared up. All is good now. Thanks to all that responded.Hopefully you didn't damage anything. I just copied this over in the "repairs" section where you may get better results.
Hydrolic oil hydrolock
A new member just posted this in owning/operating. Although I know I'm being redundant, I thought he might get better results here. https://www.tractorbynet.com/forums/threads/hydrolic-oil-hydrolock.541804/
Now that you are here, you will find some of the members more knowledgeable than YouTube. At the very least, if somebody gives a bogus answer they will get called out.
If you haven't done so already, drain all of the fluids and change them. Before trying to start it, pull the injectors and crank it over to blow the cylinders clean.
You were smart to shut it down the way that you did. I have heard of somebody overfilling the crankcase in their pickup and not been able to shut it down. They let it race until the engine blew up.
Oh yeah, Welcome to TBN!
