NealKrueger
New member
I'm having trouble with my JD 4555 3 point won't lift. Any ideas?
JD 4555 3 point won'
- Thread starter NealKrueger
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George2615
Super Member
Welcome to TractorByNet....
Three Point is Down & Won't Go Up At All.
The first thing to check if you have a loader on the tractor is if the loader is still working. This will rule out a pump problem. If the loader is working you can move on to the next paragraph. If the loader is NOT working then there is something wrong with the pump (normally caused by unhooking the hoses while the tractor is running which dead-heads the pump) or a problem with the oil supply (out of oil, dirty filter or screen?). You may need to remove the pump & inspect it for damage if the oil is full & the filters are clean. If you don't have a loader or the loader is working and you have a clean filter & plenty of oil- the next place to check is the linkage going to the valve. Be sure that a rod or pin has not fallen out and that the lever actually moves all the way to the valve. If all of this is ok then you might need to do some more in depth troubleshooting. You could have a bad three point control valve. Three Point Won't Stay Up- Leaks Down. Lift the three point all the way up and close the lock valve (usually located between your knees lust under the seat- see fig A). Shut off the tractor. If the three point still seeps down then you probably have a bad lift piston oring because, by closing the lock out valve, you have eliminated the valve & everything else in the system. If the three point stays up then you likely have a problem with the three point control valve.
Three Point is Down & Won't Go Up At All.
The first thing to check if you have a loader on the tractor is if the loader is still working. This will rule out a pump problem. If the loader is working you can move on to the next paragraph. If the loader is NOT working then there is something wrong with the pump (normally caused by unhooking the hoses while the tractor is running which dead-heads the pump) or a problem with the oil supply (out of oil, dirty filter or screen?). You may need to remove the pump & inspect it for damage if the oil is full & the filters are clean. If you don't have a loader or the loader is working and you have a clean filter & plenty of oil- the next place to check is the linkage going to the valve. Be sure that a rod or pin has not fallen out and that the lever actually moves all the way to the valve. If all of this is ok then you might need to do some more in depth troubleshooting. You could have a bad three point control valve. Three Point Won't Stay Up- Leaks Down. Lift the three point all the way up and close the lock valve (usually located between your knees lust under the seat- see fig A). Shut off the tractor. If the three point still seeps down then you probably have a bad lift piston oring because, by closing the lock out valve, you have eliminated the valve & everything else in the system. If the three point stays up then you likely have a problem with the three point control valve.
Tx Jim
New Member
1st thing to do is put L/D control knob by your right heel seating in the seat into "minimum". Do other hyd function operate correctly?
OP
NealKrueger
New member
Yes, loader and remotes work fine. Linkage is ok. 3 point won't raise.
OP
NealKrueger
New member
Yes, other functions work. I'll look at L/D control this weekend.
Thanks.
Thanks.
Tx Jim
New Member
OP
NealKrueger
New member
Thanks Jim. I have them both ordered and will be able to try them tomorrow.
OP
NealKrueger
New member
I replaced both sensors and it still doesn't work. I wonder if it's the electro hydrolic controller or the valve, hydronic Orifice control asm?
Tx Jim
New Member
I was afraid of that when you stated you ordered the sensors. Do sensors have voltage? I will suggest to get and read a JD 4555 service manual. Have you asked your local JD dealer service manager?
OP
NealKrueger
New member
I'll talk to the dealer and see what they say. Thanks.