35 3ph lifts with loader?

[guyd]

my elderly neighbour has a 35 and it does something odd:

hydraulic 'switch' in 3ph mode - works normally.

switch on loader mode - 3ph lifts, then once its at the top, the loader lifts, then acts as you would expect, but the 3ph stays at the top.

im guessing there is a leak in the valve allowing the fluid to go into the 3ph cylinder forcing it up?

thanks for any tips

guy

 

[CRE1992]

Did it just start doing this? If so does it have an isolator valve under the seat? If thats the valve you talking about there maybe a leaky gasket or o-ring. If it has always done this and the hydraulic lines just come out of top cover and go to a valve then the loader is most likely driven off the same pump as the three-point and is not isolated so when the loader lifts the 3 points lifts, a common fix would be to chain the 3 point arms down if they were not being used. The three point lifts first because it is lighter, than the loader which is heavier lifts later. Just my thoughts, don't hold me to chaining the arms down though.

 

[guyd]

afaik it has just started doing this - the owner is 80 years old, and although fit, sometimes his memory isnt the best.

There is a three way lever under the seat area - they relate to:-
1 = loader
2 = 3ph
3 = aux (used for lifting a tipper trailer)

the order here might not be correct.

when in aux mode, you can get to the end of the travel, and hear the hydraulics load up / the relief valve open, and the 3ph stays put.

in loader mode, the 3ph goes up, then at the end of its travel, the loader then lifts. lower the loader, and the 3ph stays put at the top.

hence the idea that a seal has gone. But how difficult is it to open this valve up and replace seals - and what should I look for?

thanks for the thoughts

 

[CRE1992]

I am by no means and expert, and unfortunately there are not many people on the Massey forum with old tractors . As for it loading up, maybe there is something clogging the lines? When was the last time the fluid was changed? Yet alone the filter if it has one depending on year...

If there are three separate levers under the seat, I know nothing about it except that a new one cost like $600. However if it is a simple block with one lever than you can move approximately 180 degrees read below...

You have the order correct, push it towards the dash and the loader should work, pull it to the center 3 point and push it toward rear of tractor and you get the auxiliary. I would pull off the 2 bolt diverter or isolator valve (what ever you prefer to call it) under the seat, however make sure that you get o-rings, as the standpipe which the pressurized hydraulic oil comes up should come out with the cap. If it doesn't do not be alarmed you will have to take it out from what I have been told, but MAKE sure it does not fall back into the rear end as you would have to pull of the pto lever cover to get it. Also when putting it back in, make sure you get it to sit right as if it doesn't, the three point as well as other hydraulic functions will cease to function.

I would check the the o-rings, and possibly the valve itself for wear. As the internal pump was only really designed to lift the three point, the hydraulic gpm isn't very high, so the loader takes a while to lift(most people with front end loaders out fitted them with front pumps.

HOWEVER I would first try and attach the 3pt to a heavy attachment such a set of disc's and then try using it to life the loader. If it solves the problem I would think there is a problem with the valve leaking or being worn. The good thing is they only cost $100! (I don't think the seals can be replaced)