New Holland 2120 no forward or reverse
- Thread starter MrTea
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I bought the manuals, the gauges, read a lot then started testing. The first test showed no pressure at the line going into the transmission control valve.
I was told and read the power steering was a separate system but it seamed odd they both quit at the same time. I traced all of the hydraulic lines to see what was up. My pumps are different than what the manuals show. Mine has a pump behind the timing cover for the loader etc then 2 pumps in front of the cover for steering and the transmission. I made sure there was a supply of oil to both pumps(there was) and the I checked for pressure coming out of the pumps, nothing.
I pulled the pumps, the splined shaft is sheared off. Maybe awesome. I have to figure out where to get it fixed or get the part then see if it fixes everything. I do wonder why it sheared.
I was told and read the power steering was a separate system but it seamed odd they both quit at the same time. I traced all of the hydraulic lines to see what was up. My pumps are different than what the manuals show. Mine has a pump behind the timing cover for the loader etc then 2 pumps in front of the cover for steering and the transmission. I made sure there was a supply of oil to both pumps(there was) and the I checked for pressure coming out of the pumps, nothing.
I pulled the pumps, the splined shaft is sheared off. Maybe awesome. I have to figure out where to get it fixed or get the part then see if it fixes everything. I do wonder why it sheared.
RickB
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Surely better news than needing clutch packs overhauled.
grcutter
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- Jan 3, 2016
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- Patterson, NY
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- 2000 NH 2120, 1999 NH 1920, 1986 Ford 1710
Mr. Tea,
My 2120 has the same 3 pump configuration that you describe. The pictures in the service manual do not match at all.
I'm afraid that I may have the same problem but not with the power steering pump but the HSS pump that is connected to it. I have not opened this yet as it is appears to be a LOT of work!
Were you able to find parts for this?
My search for parts comes up with either a seal kit or the whole pump a$$embly, but nothing for the internal parts.
If I did my homework correctly, this pump is SBA340451001 which is equivalent to SBA340451000.
grcutter
Member
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- Jan 3, 2016
- Messages
- 45
- Location
- Patterson, NY
- Tractor
- 2000 NH 2120, 1999 NH 1920, 1986 Ford 1710
BTW, my pump is also a KYB (Kayaba) model number model KRP4-12-5ANBHM
kbento7070
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- May 1, 2025
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- 1997 Ford 2120
My 1997 2120 had this issue. Wasn't the clutches or anything like that, turned out to be a bad diode in the computer module! The computer module is under the housing for the steering wheel, the "Do not remove" sticker on it, you have to remove and peel off that sticker to open it up. In there, test the diode, bet one is bad. It controls the solenoid for the forward abd reverse hydraulic flow. Just unsolder the bad one and solder in a new one. Pay attention to the direction of the diode, they are directional!!
Go to ebay and search for:
U19E / CROSSES TO ECG580, / CERAMIC DIODE / 3 PIECES (qzty)
Thats the one that'll work. Quick $15 fix.
Hope this helps future stuck 2120's
Go to ebay and search for:
U19E / CROSSES TO ECG580, / CERAMIC DIODE / 3 PIECES (qzty)
Thats the one that'll work. Quick $15 fix.
Hope this helps future stuck 2120's