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Levigarrett76

Zeus of the Sluice
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From the random cell phone pic thread....
1984 ford 2910 diesel approx. 3500 hrs maintained for 15 yrs ownership always stored out of rain
sdmuleman
sdmuleman said:
New Holland 2910 - 3 CYL AG TRACTOR(01/83 - 02/90) Parts Diagrams

Sheet 05B2 for ram and 05B4 for control valve seals.

Be cautious with aftermarket - there's one that says it fits a whole bunch of models but actually doesn't.
Click to expand...
Question, the lift will raise when no attachment is present and revving engine. Once raised wont budge but will hold.

If i jack up with a bush hog attached it will remain at height not leak down, and will lower with lever as normal. Ive got good pressure at the top cover hydraulic remotes, fluid level is good and clean, no leaks.
I pulled top cover and found i had the wrong sized piston seal. Even Messick's shows it 3" and mine is larger, this is an 84' model 2910 diesel 2wd no FEL
123.jpg

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After fucking around looking for awhile unsuccessfully i decided the piston was still good by air test and visual inspection and put back together because i need the fucker out of my way.

I replaced most all of the orings in the top cover while in there but most all of them looked fine, i was using the shitty one size fits all parts kit.
The (flow control valve??) moved freely in the cylinder assembly. The other stuff I didn't see anything alarming but wasn't really sure what i was looking for other than obvious broken or seized parts. It seems there are 2-3 names for alot of these parts when searching the net it gets really confusing.

65136.jpg



I did however find that behind the cap #47 was corrosion, i cleaned it up best i could. The front part (#48) would press in slightly but i could not pull or pry it out of there. I wasn't sure if #3 is supposed to move??? because it would not with a pick. Any idea what this part does?
1.jpg




Screenshot (44).png

Any suggestions would be much appreciated, Im ready to just unload the stupid thing im tired of fucking with it. Its been a damn good tractor for 15 yrs with only routine maint and some fluid changes/flushes.
 
Last edited:
I would probably find a PSI gauge and find out what HP oil pressure is.

It is really hard for a person to tell between 500 psi and 2000 psi without a gauge. Reving the engine to lift would leak to weak pump.

Does it get worse when it is hot?

Holding the load proved your cylinder and valving are fine.
 
Tiha said:
I would probably find a PSI gauge and find out what HP oil pressure is.

It is really hard for a person to tell between 500 psi and 2000 psi without a gauge. Reving the engine to lift would leak to weak pump.

Does it get worse when it is hot?

Holding the load proved your cylinder and valving are fine.
Click to expand...
I will do some googling and see what I can find for a gauge/test setup. Itd be nice if I could just test through the hydraulic remote quick connect.
When i Hit the remote at idle it bogs the engine pretty hard like it should.

At idle will lift the 3 pt arms with nothing attached, to lift my 120lb wife i had to rev engine some.

IT acts the same cold or hot, as in lifting the arms with no load. Its almost like the oil is bypassing and not able to build pressure in the cylinder.
As hard as the remote will bog the engine i would think thats plenty of pressure to lift a fairly light 6' bush hog?

Also I should add this just started suddenly.
Used it and 3 point worked fine, shut it off, few weeks went by went to use it again and no lift...
 
Possibly the pump. They can wear out and bypass internally, you'll still get pressure but no flow. Bogs when you deadhead the remotes because there's no flow required and it still pumps enough to make system pressure at no flow. When you want to raise a load it'll make pressure but so much of the oil leaks back through the pump none makes into the ram.

Or a bad relief, depending where it is in the system
 
Not getting worse when hot is a good sign for pump health.

Guess we would need a plumbing diagram to see what can be diverting or blocking the flow.

pressure would be good to know.
 
srf said:
Possibly the pump. They can wear out and bypass internally, you'll still get pressure but no flow. Bogs when you deadhead the remotes because there's no flow required and it still pumps enough to make system pressure at no flow. When you want to raise a load it'll make pressure but so much of the oil leaks back through the pump none makes into the ram.

Or a bad relief, depending where it is in the system
Click to expand...
That makes sense, last few time i used it, on a steep hill i would lose hydraulic pressure(no lift on 3 point) and sometimes pto would disengage until i got back on semi-flat ground it was back to normal. Turned out it was low on fluid, I didn't check that until the 3 point stopped working. Maybe I damaged the pump?
Tiha said:
Not getting worse when hot is a good sign for pump health.

Guess we would need a plumbing diagram to see what can be diverting or blocking the flow.

pressure would be good to know.
Click to expand...
Im looking now.


Thanks for yalls tips
 
After using it again with an un-raisable 3 point, I let it sit a few weeks, started it up to move it a week or so ago and it is back to working normally, lifting and lowering as it should?

I sourced a pressure gauge, but never put it on to test
 
I have an 85 Case with fel that had been working fine, then suddenly wouldn’t raise the fel. Thought bad pump. Turned out to be a plugged filter housing on the pickup. The filter was dirty and changed it, but that didn’t fix the problem. The pickup in the bottom of the transmission was plugged with crap and would only let a small amount of fluid through.
Not sure where your fluid pickup is. Just throwing out ideas.
 
Its covered in oil obviously, i initially ran my hand over it to feel for debris, Ill check it out closer next time it acts up
 
Mine had a bunch of what looked like paper that had been run through the washing machine. It was plugging up the screen. Was pretty obvious after we pulled it apart, but required draining the trans to get to it.
 
Levigarrett76 said:
After using it again with an un-raisable 3 point, I let it sit a few weeks, started it up to move it a week or so ago and it is back to working normally, lifting and lowering as it should?

I sourced a pressure gauge, but never put it on to test
Click to expand...
That is more likely pump losing prime when parked. If on a mild slope, park it nose down and may be less likely to lose prime. Usually can pop open a port on the pump to release air and get it in operation again. Or go through and reseal the pump and system so it doesnt pull air and lose prime.... something which I havent found the incentive to do that with on of my tractors. I just keep a wrench on it so I can bleed the air when it isnt working.
 
Levigarrett76 said:
From the random cell phone pic thread....
1984 ford 2910 diesel approx. 3500 hrs maintained for 15 yrs ownership always stored out of rain
sdmuleman

Question, the lift will raise when no attachment is present and revving engine. Once raised wont budge but will hold.

If i jack up with a bush hog attached it will remain at height not leak down, and will lower with lever as normal. Ive got good pressure at the top cover hydraulic remotes, fluid level is good and clean, no leaks.
I pulled top cover and found i had the wrong sized piston seal. Even Messick's shows it 3" and mine is larger, this is an 84' model 2910 diesel 2wd no FEL
123.jpg

2..png




After fucking around looking for awhile unsuccessfully i decided the piston was still good by air test and visual inspection and put back together because i need the fucker out of my way.

I replaced most all of the orings in the top cover while in there but most all of them looked fine, i was using the shitty one size fits all parts kit.
The (flow control valve??) moved freely in the cylinder assembly. The other stuff I didn't see anything alarming but wasn't really sure what i was looking for other than obvious broken or seized parts. It seems there are 2-3 names for alot of these parts when searching the net it gets really confusing.

65136.jpg



I did however find that behind the cap #47 was corrosion, i cleaned it up best i could. The front part (#48) would press in slightly but i could not pull or pry it out of there. I wasn't sure if #3 is supposed to move??? because it would not with a pick. Any idea what this part does?
1.jpg





Screenshot (44).png

Any suggestions would be much appreciated, Im ready to just unload the stupid thing im tired of fucking with it. Its been a damn good tractor for 15 yrs with only routine maint and some fluid changes/flushes.
Click to expand...

Something to look for. The 3-point height is controlled by a 1/4 radius handle on the right side, right? The shaft from the handle passes through the friction pad (holds the handle setting when in use) and in the hydraulics there is a spiral (kinda) plate that rides against a hardened pin. Over time, that hardened pin wears down (get a slot ground into it, or completely through particularly on older tractors). When it wears too much, the height setting while in use gets erratic. If some dumbass took all that apart and didnt put it back together correctly, the 3 point will do weird stuff as the draft control can drive the system sending the 3 point skyward with any load on it at all. Sorta sounds like what you are dealing with maybe?

Erratic behavior is hard to nail down. Been there.
 
Wasn't really intermittent, I suck at storytelling

It really broke, I took it apart and replaced some seals and cleaned shit, filled up with fluid and it was still broke.

Used the tractor with broken 3 point (wont raise bushhog on its own, but will hold and lower) for a few hours and parked it.

few weeks later, fire it up and its "fixed"
Parked for another week, fired up and used it, still fixed..
 
Levigarrett76 said:
Wasn't really intermittent, I suck at storytelling

It really broke, I took it apart and replaced some seals and cleaned shit, filled up with fluid and it was still broke.

Used the tractor with broken 3 point (wont raise bushhog on its own, but will hold and lower) for a few hours and parked it.

few weeks later, fire it up and its "fixed"
Parked for another week, fired up and used it, still fixed..
Click to expand...
I have a thread on here somewhere, but this reminds me of my Ford 555c backhoe. A couple of times the front loader would not lift after a cold start (all other hydraulics worked fine). And then almost every time I run it, the FEL won't lift after it's been running for a while. No other issues
 
Levigarrett76 said:
Wasn't really intermittent, I suck at storytelling

It really broke, I took it apart and replaced some seals and cleaned shit, filled up with fluid and it was still broke.

Used the tractor with broken 3 point (wont raise bushhog on its own, but will hold and lower) for a few hours and parked it.

few weeks later, fire it up and its "fixed"
Parked for another week, fired up and used it, still fixed..
Click to expand...
Air in the system that worked its way out? 3 points do weird stuff if they arent 100% happy. Glad it is working for you now.
 
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