Hydraulic lift does not lift all the way up

Anonymous-0

Well-known Member
Hydraulics stopped working so I removed cover, cleaned and replaced the ORings. Replaced fluid. Lift only raises @2/3 of the way up. Do I need to adjust something, or could it be air in the system?
 
(quoted from post at 09:13:03 04/15/13) Hydraulics stopped working so I removed cover, cleaned and replaced the ORings. Replaced fluid. Lift only raises @2/3 of the way up. Do I need to adjust something, or could it be air in the system?
hat tractor?
 
(quoted from post at 09:44:38 04/15/13) Ford 861 (1961 model)
f it will go all the way up in DRAFT CONTROL mode , but not all the way up in POSITION CONTROL mode, that is generally wear of position control pin/cam. Pin can be pressed out/driven out & replaced & if cam worn significantly, it can be built up with weld.
 
Jmor, thank you for the input, and for you quick response. I am learning a lot reading responses from you, soundguy, old and others. All who come to this forum benefit from your knowledge and willingness to help. Thanks.
 
(quoted from post at 10:37:47 04/15/13) Jmor, thank you for the input, and for you quick response. I am learning a lot reading responses from you, soundguy, old and others. All who come to this forum benefit from your knowledge and willingness to help. Thanks.
lways welcome.
 
when you repalce that cam pin and look at the cam.. many time it wears in profile, so you have a witnes mark with which to build it up to and file down. some also use a longer pin to ride the entire surface.. or some.. just us ethe longer pin to rid ethe rest of the good surface and don't build it up.

I'm a fan of replacing the pin, building up the cam.. and using the longer pin so it rides the entire surface..e tc.

good luck
 
Soundguy, thank you. I would have replaced pin, ut thought it looked ok. I should have pulled it. Let me ask you, would not system compress under load. That is what I was taught about water & air in the USAF.
 
Correction: trying to ask "if the presence of air or water would contribute to failure of lift to raise as high, because they will compress more than oil." Right?
 
water, as a fluid, is just as uncompressable as oil. air compresses.. but that piston seal is not air tight, and thus will self bleed.

EVEN IF there was air in there.. the air would compress and or escape AND the system would still ultimately reach full height
 
(quoted from post at 12:00:10 04/16/13) Correction: trying to ask "if the presence of air or water would contribute to failure of lift to raise as high, because they will compress more than oil." Right?
ir will resolve itselfover s short period of use & water, while bad for corrosion, is as incompressible as oil. Did you ever say whether it will lift all the way in DRAFT mode?
 
Jmor and Soundguy:

I went to farm today and tried the test Jmor suggested.

RESULTS:

In Position Control [lever parallel with cover] the lift arms lift to 21" off ground--no higher. This is normally the position of the lever.

In Draft Control [lever pointing down (vertical)] the implement drops to the ground even with Touch Control arm in the UP position. There is no lift at all.

FYI: I had left lift arms in the up position last weekend--all weight of implement remaining on system. It has remained in that position.

Additional info: When I removed the Lift cover to rebuild, I found the control valve linkage screwed out as far as it would go; and it was in a bind, so I turned it in until the binding ended, and no slack was caused. I confirmed that the valve was functional. HOW should I adjust this? and would that affect the failure to lift all the way up? Thank you.
 
The FO-20 goes through the adjustment procedure both with special tools (which 99.44% of owners do not have) and a method without the special tools. Just follow instructions to the letter.
 

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