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Setting Lever Springs For MF35 Hydraulics

 

Making the settings on the lever springs for the Massey Ferguson 35 hydraulic system is quite a fiddly job, and the method is shown in detail on the MF35 Hydraulics DVD.  However, we just thought that a written description of the process may also help.

Setting levers of hydraulics on massey ferguson 35

The spring balance should be attached at the very end of the levers

So here it is…

  • Loosen retainer nut and eccentric cam.
  • Make sure quadrant levers are set at their sector marks. The round lever exactly over where it says ‘FAST’, the square lever next to where it says ‘DRAFT’ between the two dots and exactly where the arrow is.
  • Make sure the lift arms are in the fully lowered position. (that is upwards if the top cover is flipped upside down).
  • Make sure your spring balance is connected right at the top of the lever (if it is connected lower down the lever it will require more force to move the lever).
  • When 3 lb. of pressure is applied it should only just spring it into contact with the front of the slot in the lever support bracket.
  • Obviously adjustment of the spring pressure is made with the self-locking nut on the guide rods.


After this adjustment is made the eccentric cam can be moved around into firm contact with the cam arm and the nut tightened.  The above adjustments can be checked – move the operational lever from its sector marks into the response range, as the lever leaves the ‘FAST’ position the levers that we set with the spring balance should begin to move to the rear of the guides.
The adjustment is very fine and fiddly.  It is often right at the end of the movement of the levers where the 3 lb. can be achieved.
The setting is 3 lb. (1361 grams) of force to move the lever.  The reason for this is that this equals the force applied by the control valve spring when the assembly is fitted and connected in the tractor.  It is a very difficult setting to make and when using a spring balance the 3 lb. setting cannot ever be particularly accurate.
 

5 Responses to “Setting Lever Springs For MF35 Hydraulics”

  1. Hi there , wondered if you could help , after studying your video numerous times we cannot seem to acheive 3 pounds of pressure on the on the quadrant levers actually more like 8 pounds !! but also by adjusting the lock nuts dosent make any difference to the pressure , the nuts are actually now at the end of the threaded bars , also by winding the nuts further up the threads to achive any sort of movement it still reads 8 pounds , everything is freely moving and not jammed up …. at a bit of a loss at the momment , any help would be brilliant , regards Darren Davies

     
    • Darren Davies
  2. Hi Darren,

    This is a fiddly job and although normally when we have performed this setting ourselves we have achieved the desired 3 lb., there have been ocassions when it hasn’t been possible to get to that figure.

    One question. Is it the original lift cylinder? The reason I ask is because there is a batch or replacement lift cylinders out there in the tractor parts supply chain that have the mounting holes (for the triangular plate) drilled in an incorrect place. This throws out all the settings and the ability of the system to work properly.

    Undertake the following check…

    “The adjustments can be checked – move the operational lever from its sector marks into the response range, as the lever leaves the ‘FAST’ position the levers that we set with the spring balance should begin to move to the rear of the guides.”

    Steve.

     
    • Vintage Tractor Engineer
  3. Thanks for your reply steve , checked lift ram and it is the original MF unit ! think I may now no the problem , I removed the quadrant levers prior to all this and totally stripped down to restore fully but even though I marked up the levers when I disassembled them (cos as you know there braised on)there is a possibility they havn’t gone back where they should (don’t ask) problem now is I carnt seem to find a drawing detailed enough to explain the correct position of them relevant to the cams at the opposite end ……. any ideas !!! regards Daz Davies

     
    • Darren Davies
  4. My lift goes up no bother but comes crashing down at an alarming rate of knots.how do I try and cure this

     
    • Euan
  5. HiDarren,
    The Diff on my 35x 1968 is ceased on. with a lot of work oil,heat and tapping with a hammer the pedal has freed up as it should be.But the axel remains locked?What can I do.
    regards
    Brian

     
    • Brian McCabe
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