MF 35 hydraulics/135

Hi all I've got a MF 35 3cycl with a 135
swept axel lift lift head no 897 558M1

I'm sure this is a 135 lift head as it's
much thicker in depth has a bigger cross
shaft and the big cylinder and piston.
The quadrant on it is the same as the 35.

I decided to replace the cylinder/pistons
and rings on it recently.
I'm now trying to set the levers in there
respective marking to the force of 3
pounds and adjust the eccentric cam etc.I
can to this no problem with the draft
lever but the lift control lever is
pulling to a force of 14 pounds before
reaching the end leaving me that I can't
set it to 3 pounds. It takes a great
force to pull the position controls back
no mater where the lever is on the
quadrant
What's going on here from the pic
attached can you tell me if I have the
internal control and draft guides sitting
in the right place? I'm pretty sure
that's where they were I was stripping
them down?
Any help greatly appreciated..

Hi, it would appear that you have assembled the quadrant rollers in the frame linkage incorrectly. To require that much load you must be compressing the frame spring and not mimicking the 3lb load applied by the control valve lever.
DavidP, South Wales.

Thank you David ill see can I put the position control in another way.
It's very odd as when I move the quadrant lever the lever and rod on the spring moves.

I'll report back.with my progress

(quoted from post at 12:54:45 10/21/18) Thank you David ill see can I put the position control in another way.
It's very odd as when I move the quadrant lever the lever and rod on the spring moves.

I'll report back.with my progress

Click to expand...

I see that you used one of the jigs for lifting and turning your top cover over. I had a machine shop make me one and also the adjustable handle for turning it up and resting it on the ground.

I haven't tried using mine since I didn't have to remove the top cover to solve the problem. Glad to see someone using one.

I don't know, but I can guess. 35 has version Mark1 lift hydraulics and 135 has Mark2 lift hydraulics. So you have Mark2 eccentric cam pushing Mark1 rods. Maybe that eccentric cam is bigger and pushes the follower when the link arms are in down position as much as older model cam would push in the top position?

If that worked before you took it apart, then I'm probably wrong.

Yes Caryc the hindge for the hydralic lift head is a must as its a heavy piece of kit and no fun lifting even with help!! I hope you dont need to use yours lol but still very handy to have.

Yes Fievel Farmanimal I understand what you mean. As far as Im aware although Im open to correction the 35 had a Mk 1 and 2 lift head and the 135 had a Mk1 and 2 lift head.

The depth of the metal casting was mainly the difference on the 35s and the 135 Mk 1 head was on the swept axel (early) 135s and had the same way of working as the 35, pretty much the same internal linkage. The only difference is there grease nipples on the top for to grease the cross shaft and the draft rod is a straight rod as you can see like mine where as the 35 had a more bent/crooked draft control.
Mk 2 135 heads the square straight axel had a difffernt system were the whole internal hydraulics were differnt and the lift controls worked the opposite way. Position lever when up - lift went down... and vice versa.

Back to my problem though I took a look at it again and the quadrant control lever and internal levers seem to be in the correct place. I flipped the cover back over and put my phone in the side plate to take a video. Ive attached the link. All appears to work right Although Ive still not required the 3 pound force on the postion lever its some what greater 14 pounds. Problem now is the control lever is not going totally back to the down position and leaving the pump valve lever to become open causing the lift to come up when I start the (Mk1 pump) although I cant see it making any difference as all was working before, all I done was replace the cyclinder, piston and piston rings.

Ive attached some pics of the internals and the video and I hope someone can tell me where Im going wrong here and what goes where?

Many Thanks

Pics of internals with and with out quadrant in


https://youtu.be/3BcaKdpIObU




Untitled URL Link

with quadrant

without quadrant