MF35 hydraulic lift?

nboost · Jan 4, 2021

My rear hydraulic lift only goes up to a certain point. I can attach my box blade & it will only lift it about 8 inches of the ground with the lever positioned to the rear. If I push the lever all the way forward it with raise it a lot higher. Is there any adjustment that needs to be done or is the pump going out or what?

Dieseltech · Jan 4, 2021

If it lifts, the pump is working. Sounds like the lift cover may need adjustments. The FORWARD lever position should NOT be used for lifting, that's the fast/slow
response setting area. The TOP lever stop bolt might not be set right, and/or internal linkage set wrong too. Lift the arms fully up BY HAND, and place a mark across the
arm shoulder and lift cover. The upper stop should be set so the arms are about 1/8 to 3/16 inch BELOW fully up mark. You should NEVER hear the pump working hard when the arms
are fully up, set the upper lever stop bolt forward more if needed, or you might wreck the lift cover and/or rear diff case.

nboost · Jan 5, 2021

(quoted from post at 04:22:30 01/05/21) If it lifts, the pump is working. Sounds like the lift cover may need adjustments. The FORWARD lever position should NOT be used for lifting, that's the fast/slow
response setting area. The TOP lever stop bolt might not be set right, and/or internal linkage set wrong too. Lift the arms fully up BY HAND, and place a mark across the
arm shoulder and lift cover. The upper stop should be set so the arms are about 1/8 to 3/16 inch BELOW fully up mark. You should NEVER hear the pump working hard when the arms
are fully up, set the upper lever stop bolt forward more if needed, or you might wreck the lift cover and/or rear diff case.

Is there a video or something written on how to make these internal adjustments?

Thanks for your time

DavidP,South Wales · Jan 5, 2021

Agreed with Dieseltech. It would appear that the three point linkage and the pump control valve are not communicating properly. You have potentially 60 years of wear in the tractor. I frequently compare the hydraulic system to a see-saw. When working correctly the relationship between the quadrant lever, the control valve and the linkage position forms the ‘balance’ . Move the quadrant lever to upset the balance and the system will resume the balance after changing the position of the linkage. Having wear in the control spring, the ram arm, the frames and rollers is enough to cause your problem. I would advise that you do not waste time in trying to adjust it out. Remove the cover and understand how it works so that you can see where the problems are. A workshop manual, preferably a genuine one is essential. Again, agreeing with Dieseltech, the linkage must NOT be allowed to lock up at full lift.
DavidP, South Wales

John Deere D · Jan 5, 2021

Service manual.......
Way to much info to try without a Manual.......

"YT" used to sell a video on MF 35 lift ....servicing..
Bob..

miner09 · Jan 5, 2021

Where is the draft control levers set? This will make a big difference.
Should be between the two arrows. Look close next to where the levers
works up and down. Below the arrows will be fast-slow at bottom.

nboost · Jan 6, 2021

Okay, this gives some things to check. I ordered a manual so hopefully that will help also.

Thanks everyone

MF35 hydraulic lift?

nboost

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Dieseltech

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nboost

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DavidP,South Wales

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John Deere D

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miner09

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nboost

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