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question Zetor Crystal 8045 hydraulic problem

D

damiench

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Jan 22, 2018
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damo
I have recently bought a zetor 8045 with a seized motor i have got it running but the hydraulics and 3pl will not work none of the levers do anything gearbox is full of oil is that where it gets it oil from ?
Suggestions of what to check next
Also the steering box is leaking oil out of the top can you replace the seal from the top or have to pull the steering box apart

 

Yes the oil from the gearbox is used for hydraulics, if the hydraulics aren`t working I would start to see if the lift pump is working, if it is then there could a problem with the linkage in the back end then it could be in what's called the black box. If the 3pl not working try open the big nut where the return coupling is, put in a long screwdriver and hit the screw head inside and see will the arms raise , if doesn`t work then the rubber rings on lift cylinder under the lift cover are worn . so you will have take off the lift cover to check linkage for both 3pl and hyds.

when you say steering box do you mean the steering unit under the radiator?


To check the hydraulic pump is working ok before you go trying anything else. Shift the hydraulic levers in the cab all the way forward or all the way back you should hear the hydraulics humming at least then you will know if the pump is working.
 
Thanks for reply how is best to check the lift pump .
Yes the steering box under the radiator it leaking out the top of sector shaft seal .



There was no noise couldnt hear anything trying to work the lever on the left hand side of gearbox is all the way forward
 
Thanks for reply how is best to check the lift pump .
Yes the steering box under the radiator it leaking out the top of sector shaft seal .
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If you hear it humming at least you will know its going, but you can get a pressure clock and plug it into one of the couplings on the back. No pressure will show on the clock If the pump isn`t working though

As for the steering unit yes it has be taking apart to put seals in it. One I had before I brought it to a garage to recondition it, but I have a parts book for it now. Its in 2 sections


There was no noise couldnt hear anything trying to work the lever on the left hand side of gearbox is all the way forward
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The levers for the hydraulics is on your right hand side as you sit
 
There is no humming no noise when operating levers in any position
 
There is no humming no noise when operating levers in any position
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Well then check the pump is not turned off, there is a handle on the pump on left side of the bell housing. make sure the handle is not pointing at 0
 
Just to double check you have pushed the lever for hydraulics which on your right and closes to the seat, slide it all the way back towards the window and hold there to engage, now you should be able to hear the pump humming and also the engine will sound under pressure. you also see the hyd couplings vibrate on the back.


I have recently bought a zetor 8045 with a seized motor i have got it running but the hydraulics and 3pl will not work none of the levers do anything apart
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There is a flow control knob under the seat make sure it is not wound into the last it will stop the arm lifting.
 
I have also found the pto will not turn either . Is that driven the same as the hydraulic pump ? Does the hand brake on the right hand side have anything to do with it ? the small lever at my right foot seems to clunk/grind so something is moving in there either way it doesnt seem to spin anything is there a hand cluch that could stop it
 

No the hand brake is only for the brakes, there is no hand clutch on a 8045. the PTO is no worked by the hydraulic pump. there is a lever on the floor near the hand brake that will put the PTO in neutral , putting that in to gear when the engine is off could be why the PTO not working
 
I had the engine running the pto still didnt work
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You need to check to see is hi/lo working too, there is a pump that works the PTO and the splitter in the bell housing that works both
Be sure there lever on the dashboard is working ok for turning on the PTO, so many times they are sized
 
Thanks pto working once i put it in either high or low feel a bit silly about yhat one . Still dont seem to have hydraulic pressure. removed pressure line comes out L/H side next to lever and goes to front end loader controls has no pressure a bit of oil not pumping not even air pulled cartridge filter off l/h side had a bit of oil not lots gearbox has oil to just above 2nd notch on dip stick . Tractor had been sitting for over 2 years before i bought it would i need to bleed the pump and how best would i . But it doesnt seem to make any bad noises ?
 
Never had to bleed pump but to do this you need to raise up the back of the tractor so the oil runs to the pump and work the lever, but you should hear the tractor engine sound under pressure if you engage the hydraulics without any thing plugged into it. If you have a loader on it pull out the pipe on the back going to the valve chest or you won't hear if it humming or not.



Unless the pump is stuck it sounds like you be replacing the hydraulic pump
 
It is looking that way the pressure line sraight out of pump i removed and it had nothing . Can you remove the pump out the side cover or do you have to stlit or remove something to get to it i might pull it out and have a look through it if it is not to hard to remove ? Thankyou for your info and help it is very much appreciated
 

Yes the pump will come out of the side of the tractor at the bell housing, you need to raise up the front wheels high or up a ramp so you don't have to drain the oil, remove the plate open the bolts and pry off the pump off the shaft , put a drum under the hole in the bell housing as there will some oil still come out and then you'll be able to wiggle the pump out.


There is No trouble answering questions on your tractor that is my favourite subject Zetor Crystals. I did so much work on them in the past chopping and changing them, it all stopped when we changed to Forterra sort of miss it.

I have the parts number the pump if you need it. What part of the world are you in?
 
Im in Australia lovely weather here over 40 degrees here the last 5 days not much fun.
This is my first zetor got it not running stripped and put back together the engine it runs well now . havent played much with tractors i work with trucks .

 
Im in Australia lovely weather here over 40 degrees here the last 5 days not much fun.
This is my first zetor got it not running stripped and put back together the engine it runs well now . havent played much with tractors i work with trucks .
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Wow down under 40c bit hot ok, 8c in Ireland today. Well fair play on getting it going again and working on your first Zetor easy enough tractors to work on. I bought my first Zetor 8045 in 1992 and since then I`d always owned Zetor and now I`m on my fourteen, a new 140 HSX, and We had about 25 Zetors on the home farm I worked on nearly all of them so if you want any advice ask away


Did you try see is the four wheel drive working? and how are the brakes?
 
Not sure if 4wd is working cable seized that operates it i think the one on the left that goes down to the valve. How is best to check it ? Does that cable valve thing have to engage it ? The brakes seem to work i rekitted both the master cylenders they were leaking .
 

Yes the cable that works the 4wd can be either behind the driver seat on the left hand side on the floor near the back window or a knob under the driver seat, it's not always in the same place. but if the cable is seized inside you can only test it by cutting it near the valve and pull the inner wire by a vice grips down at the valve.
If you can pull out the wire by 25mm it should be in 4wd, then if you drive on loose ground and let out the clutch a bit quick the front wheels should spin.
To fix the cable try put wd40 around the top .


If you need to buy a new cable the inner wire needs to be soldered into the lock nut that's on the valve when you open it you will see the way it's done


What age is your 8045? My first one was from 1978 and the steering was very heavy.
 
84a-200 how do you tell the year ? The steering felt ok to me seemed light but i have only driven it out of the shed ! How much oil does the gearbox hold ? Im going to take the pump out and inspect it .


Any tricks or things i should be aware of taking the hydraulic pump off ?
 
84a-200 how do you tell the year ? The steering felt ok to me seemed light but i have only driven it out of the shed ! How much oil does the gearbox hold ? Im going to take the pump out and inspect it .
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There should be a plate under the dash down near the break pedal failing that there should be a plate on the engine block that has the year of manufacture stamped on it.

The gearbox holds 52 litres, I'm not sure you will be able to tell a lot from looking at a pump, I have never opened one but some people have put kits into them, we only took them off and replaced them.


Any tricks or things i should be aware of taking the hydraulic pump off ?
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Either empty the oil from the gearbox or raise up the front wheels so you don't get covered in it, you will need to pry the pump out of the shaft and mind the O ring. 2 bolts hold it in, the inside one is the hardest
 
I only got 18 litres out of the gearbox i guess that could be why its not working ill get some more oil next week and fill it with 52 litres .
 
Your sure that the engine not humming when you engaged the lever. That test I mention earlier only works when nothing is plugged into the hydraulics and the oil has no where to go, and it's forced against the coupling. The tractor sounds under pressure.


I only got 18 litres out of the gearbox i guess that could be why its not working ill get some more oil next week and fill it with 52 litres .
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52 would be completely empty, it would 2 drums to be enough anyway, 18 is way under total amount it would want especially if there's a loader on it


There is 2 bung nuts to empty the backend, 1 at the gearbox and the other is under where the pickup hitch is, if you drop the hitch you will see it
 
I just drainded the front bung under gearbox is the back (diff ) joinded or 2 total seperate chambers ?
 
I just drainded the front bung under gearbox is the back (diff ) joinded or 2 total seperate chambers ?
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No it's all one big section, it's just if you want it to empty completely if your going to fill with all new oil it would be no harm to open both bung nuts, also the back one has a magnetic on it so you will get any steel particles out of the backend.


bit of oil not lots gearbox has oil to just above 2nd notch on dip stick . Tractor had been sitting for over 2 years before i bought it
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Unfortunately you cant always go by the dipstick in those tractors there was some of them had long sticks and a raiser on the top to bring the nut flush with the floor and more that were down under the floor that you would need a socket with an extension bar to reach. But the oil needs to be up to between the second and the third notch if you got a loader on it.
 
I finally got the hydraulics work thanks for your info i ended up pulling the pump off testing it and the drive replaced o rings and checked cartridge filter replaced that o ring as it was leaking filled all galleries with oil and filled with new oil 50 something litres and its working good . Just have power steering box to fix now . What is the recommended oil.for power steering? Is it ATF oil ?
 

Yes ATF oil its red colour. fill the tank and turn the steering wheel from lock to lock a few times.



Did you get the 4WD cable fixed too? you must have it all fixed well now so?
 
No i havent looked at the 4wd yet ive been busy havent worked on the tractor much lately . Now my next problem is the steering box leaking out the thread on top from the sector shaft how is best to fix that is there a seal in that or just the thread tension to stop oil leaking from there ?
 
Now my next problem is the steering box leaking out the thread on top from the sector shaft how is best to fix that is there a seal in that or just the thread tension to stop oil leaking from there ?
Click to expand...

When your looking down at it from the top first is a the tab washer and a circlip from a cover under that is a sealing ring.
 
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