Zetor 6211 No 3PL Lift But Power Steering Works

[MikeT777]

Hey everyone, I've got a 6211 I've been repeatedly tinkering with but having no luck.

There is no hydraulic pressure to the 3PL ram. Power steering works fine. There is oil getting back there but no oil is coming from the high pressure hose leading to the ram. I was running the tractor for a number of months after the high pressure hose burst. Hoping the hydraulic pump isn't damaged. Does anyone know how to prime the 3PL ram on the 6211? Really frustrating problem. I am assuming it is pressurised by the hydraulic pump at the front left side? If anyone can point me in the right direction that would really help. Seems like it is just needing to be primed but I have no idea how to do it. Tried parking it up and down hill with no luck. Maybe I should change out all the oil?

Thanks everyone. Can provide more information at your request.

 

[Handyman]

Had that model where I work, we used it for snow removal. lost hyd on it one year replaced filter, no go, took it inside for a few days to see if water had got in system and froze, still nothing. finally loosened the hydraulic line coming from the pump got some air, foamy oil, and then some oil tightened the line back up and the three point worked like it should after that.

 

[MikeT777]

Had that model where I work, we used it for snow removal. lost hyd on it one year replaced filter, no go, took it inside for a few days to see if water had got in system and froze, still nothing. finally loosened the hydraulic line coming from the pump got some air, foamy oil, and then some oil tightened the line back up and the three point worked like it should after that.

Thanks for taking the time to reply Handyman. Are you talking about the lines right at the pump at the front left of the tractor? Or the lines underneath the seat? I may try loosening the line coming from the pump again today and see if I have any luck. Here are a couple photos to help illustrate things:

Photo 1, Centre: lines above hydraulic pump which I assume were the ones that solved the issue for you?

Photo 2: underneath the seat

I probably should know more about the tractor I own. I'm not too bad with engines, but just a bit lost with this hydraulic issue. The 6211 has just the 1 pump right? Sorry for the trouble, I just have a fence to build and need the hydraulics working!

 

[Handyman]

Thanks for taking the time to reply Handyman. Are you talking about the lines right at the pump at the front left of the tractor? Or the lines underneath the seat? I may try loosening the line coming from the pump again today and see if I have any luck. Here are a couple photos to help illustrate things:

Photo 1, Centre: lines above hydraulic pump which I assume were the ones that solved the issue for you?

View attachment 77580

Photo 2: underneath the seat
View attachment 77583

I probably should know more about the tractor I own. I'm not too bad with engines, but just a bit lost with this hydraulic issue. The 6211 has just the 1 pump right? Sorry for the trouble, I just have a fence to build and need the hydraulics working!

right at the pump, it seems to lose its prime and needs to be bled once in a while.

 

[Pycoed]

Should never need to reprime the pump aslong as you have sufficient oil in the backend. Are you sure you haven't moved the PTO selector lever to neutral by mistake? The positions are Pump Only, Pump + PTO, Neutral & Ground Speed. Does the PTO work? Power steering has a separate pump & reservoir - separate system altogehter

 

[MikeT777]

Should never need to reprime the pump aslong as you have sufficient oil in the backend. Are you sure you haven't moved the PTO selector lever to neutral by mistake? The positions are Pump Only, Pump + PTO, Neutral & Ground Speed. Does the PTO work? Power steering has a separate pump & reservoir - separate system altogehter

Thanks Pycoed. I have a bad feeling the pump may have been wrecked due to being run dry for so long. Pto definitely working. Thanks for clarifying about the power steering being a separate system, I just started realising that when I saw the lines only lead to the power steering ram.
The backend is filled via the dipstick hole in the drivers floor, correct? There is definitely enough oil in there. Honestly at a loss with this. Hopefully won't have to open it up but I've tried everything I can think of. Best I could get was a tiny bit of oil to spit out the outlet leading to the ram when moving the height lever on the right. Only other thought I had was maybe I could reverse bleed it through the high pressure outlet using an external pump. If that doesn't work I assume the pump must be toasted? Thanks so much for your reply.

 

[Pycoed]

Thanks Pycoed. I have a bad feeling the pump may have been wrecked due to being run dry for so long. Pto definitely working. Thanks for clarifying about the power steering being a separate system, I just started realising that when I saw the lines only lead to the power steering ram.
The backend is filled via the dipstick hole in the drivers floor, correct? There is definitely enough oil in there. Honestly at a loss with this. Hopefully won't have to open it up but I've tried everything I can think of. Best I could get was a tiny bit of oil to spit out the outlet leading to the ram when moving the height lever on the right. Only other thought I had was maybe I could reverse bleed it through the high pressure outlet using an external pump. If that doesn't work I assume the pump must be toasted? Thanks so much for your reply.

I don't think the 12 series i.e. your 6211 is much different from the 10 series which I have (7045) but I know there was a change of power steering systems at the end of the 12 series. If you have a ram running from under the left floor behind the battery parallell to the engine, then it is the same as mine & definitely a completely separate system - it's power assisted steering rather than full power steering. Pump for this is on the front of the engine with a tank up near the rad.
If you connect a pipe to one of the spools & set the control lever (the inner one) to pump (i.e.backwards) you should get oil shooting out at full pressure (easy way to drain the oil into containers!) If not then you'll need to check the pump further.
Hydraulic pump is inside under the backend, you'll need to drop all the backend oil (about 70l - 14 galls) & theres a plate with the pump on & screen underneath you can drop - it doesn't look too difficult (never done it myself). If you are lucky it's just muck in the screen, but the pumps are not too expensive. Have a look on Zetorworld .com - there's lots of good info there.

 

[MikeT777]

I don't think the 12 series i.e. your 6211 is much different from the 10 series which I have (7045) but I know there was a change of power steering systems at the end of the 12 series. If you have a ram running from under the left floor behind the battery parallell to the engine, then it is the same as mine & definitely a completely separate system - it's power assisted steering rather than full power steering. Pump for this is on the front of the engine with a tank up near the rad.
If you connect a pipe to one of the spools & set the control lever (the inner one) to pump (i.e.backwards) you should get oil shooting out at full pressure (easy way to drain the oil into containers!) If not then you'll need to check the pump further.
Hydraulic pump is inside under the backend, you'll need to drop all the backend oil (about 70l - 14 galls) & theres a plate with the pump on & screen underneath you can drop - it doesn't look too difficult (never done it myself). If you are lucky it's just muck in the screen, but the pumps are not too expensive. Have a look on Zetorworld .com - there's lots of good info there.

Awesome info, thanks Pycoed. I've tried filling the backend oil up and had no luck other than a drip from the hose to the ram. I'm hoping it's just a clogged screen, so will be dropping the plate you mentioned in the next couple days. Any idea where the drain bolt is? (If no drain bolt I will just let it trickle out of that plate).. Appreciate your help/direction. I'll update the thread to let you know if the screen is clogged.

 

[Pycoed]

Awesome info, thanks Pycoed. I've tried filling the backend oil up and had no luck other than a drip from the hose to the ram. I'm hoping it's just a clogged screen, so will be dropping the plate you mentioned in the next couple days. Any idea where the drain bolt is? (If no drain bolt I will just let it trickle out of that plate).. Appreciate your help/direction. I'll update the thread to let you know if the screen is clogged.

Mine is a 4WD so the drain plug is at the rear of the drop box for the 4WD output, but I think there's another vertical plug further back as well. If you connect an open hose to the right hand quick connect (on mine anyway - if it doesn't work, try them both) & set the inner lever at the right of the seat (i.e not the three point lever) to the pump position i.e. all the way back, the hydraulic pump should pump out the rear end oil through that hose. It saves a lot of time messing with buckets underneath - you can just fill 5 gallon containers one after another with no risk of spillage (use the lever to switch the flow on & off). Leave a gallon or two in to save running the pump dry which you'll have to drain in the normal messy way.
If the pump doesn't send any oil out of this hose then you'll definitely need to investigate further via dropping that plate & checking the screen.

 

[Pycoed]

I've just remembered there's a screen filter & magnet etc under theseat which you can access without draining anything - tip the seat foward & lift the rubber & soundproofing & you should see a 2 1/2" diameter aluminium cap which unscrews to reveal a screen & set of magnets along a rod. Take a look at this first. I also found some gen from the manual online which I enclose below - you can probably get the manual & parts books from Zetorworld. I have the parts book for my series & when I need parts I make a note of the numbers & order direct from Czech republic online - a lot cheaper than UK prices but since Brexit the carriage costs have risen quite a bit.

 

[Pycoed]

I've just looked at that three way connector you pictured under your seat & I think the 12 series may have a diffferent hydraulic layout than mine (10 series). Do a Google search for "UR1 5211-7745 Parts Manual.pdf" which should help a lot. Please let us know what you find &fix.

 

[MikeT777]

I've just looked at that three way connector you pictured under your seat & I think the 12 series may have a diffferent hydraulic layout than mine (10 series). Do a Google search for "UR1 5211-7745 Parts Manual.pdf" which should help a lot. Please let us know what you find &fix.

Thanks so much for your time/replies Pycoed. I ended up pulling the entire plate off with the pump (after I cleaned the filter) and found the hydraulic pump to be working correctly as far as I could tell. When I placed my finger over the output it pushed my finger away. I am now suspecting there is something wrong with the lever or something else connected to the main 3pl lever is stuck. It had been sitting in the down position for a long period of time so perhaps a valve somewhere got stuck. When I push the remotes lever up or down (the one just to the left of the main 3PL lever), the revs dip. I'm considering running the 3PL ram straight from one of the remotes on the back. Do you think this is a viable option? At this time I'm not intending on digging too much into the hydraulics or splitting anything apart. I just need to be able to lift our implements!

 

[MikeT777]

I was thinking of running a hose from the ram from one of the spools is what I mean!

 

[MikeT777]

If you have any other knowledge on what exactly would be causing the main 3PL to not work that would be awesome. If it can be repaired without busting open the case that would be great. For now though I am willing to just skip that repair and use the other lever to lift and lower. Less of a PITA. From what I've read I'm wondering if there may be an issue with the hydraulic distributor since spools are working.

 

[Pycoed]

Sorry for the tardy response - I've had a bout of gastritis & been out of action for a while then got sidetracked with a little Yanmar I bought.
Did you get it fixed?
Unfortunately you have exhausted my expertise in Zetor hydraulics! I'd suggest a good look at the Zetormatic hydraulic distributor manuals available free online - I bet its a sticky valve or O ring decomposed somewhere - my only involvement with that has been on the spool outlet side of things curing a leak from an inappropriately sized copper washer that was the very devil to get out.
The Zetormatic system was quite sophisticated for its time with simultaneous operation of spools & three point - it certainloy is a big improvement on my previous UTB445DT which was a similar age.