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solved Zetor 8011 crystal hydraulic question

C

camelot

Member
Level 2
Joined
Dec 9, 2024
Messages
5
Location
Vittoria, ON, Canada
First name
Russell
Machinery:
Zetor 8011 crystal
While working on a neighbour's 8011 crystal the hydraulics wouldn't raise so behind the seat is a knob and I decided to unscew the knob. The piece came out and I suspect I lost an o ring or copper washer or something because it leaks a little now. Can anyone tell me what this knob does and would you have an exploded diagram showing its parts especially washers or gaskets.

 
That knob locks the arms in a lifted position, it also can be used to adjust the speed you want the lift arms to go down. Was it the arms won't lift? OR The hydraulics won't lift? If the arms won't lift, 4 things. 1, you'd no oil in backend. 2. some linkage come off or broke in the lift cover. 3. The seals in the lift cylinder cover have popped. or 4. Your lift pump is knackered. If the hydraulics won't lift, your pump is knackered.

My parts book doesn't much there, only 2 rings.
 
Last edited:
Thanks so much. I'll assume that knob pulls up and pushes down and with his tractor it probably hasn't been moved for 50 years. Looks like I need part number 60. You would have the part number for 60 would you?
Do you know where I could download a parts manual for the 8011?
 
The owner came over and told me if it sat for long periods of time the system would get air in it si he showed me a hydraulic connection outside the cab but working through the step on the left side of the cab (standing at back) we loosened the connection and it spurted air foe a couple of seconds then it flowed oil and wde tightened it and the arms raise and lower as they should.
 
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