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MF 35 hydraulic lift problems - need help

R

rveach

New User
I just put in a new hydraulic pump, ram piston, and ram piston rings in my MF35 Deluxe. All new from AI Products. Now my gear oil foams and I get no lift. It tries to lift, but there is no pressure.

I took off the stand pipe cover and fluid is flowing up the tube but its not building any pressure. I get some fluid dripping from the opening of the ram cylinder but not as much as is coming up the standpipe.

What did I miss?
 
Oil
a78760.jpg
 
OK, the "problem" was pretty simple. The operators control lever wasnt opening the control value on the pump all the way. I needed to adjust the lever. So now I have full pressure (2500 PSI) and the lift works; however, the operating lever only actuates the control valve in the last two or so inches of travel. Is this normal? I'm used to having more throw in the lift lever but I've never used a MF35 before.
 
Are you using a 90w--GL5 oil. I'm not sure if this is correct for the 35,(look at top filler plug) manual should show right oil. May be reason for the foaming.
 
If you refer back a few days, you will find my post on almost the same problem., Well, you got some serious foaming... carbonating affair gong on, not mine, but... I finally got into the porthole, pushed the pump's roller with my finger- the long tapered lever hitting the roller isn't going rearward far enough- 3/8 to 1/2 shy of a good strong lift of the rock shaft.. Not a fluid issue, nothing expensvie broken, but I bet both of us are going to have to adjust these levers to do the job. I am expecting the cover is going to have to come off.
 
I took the top cover off today and I think I made it worse. I just dont understand how to do the adjustment. There are two spring loaded adjustment screws one for draft and one for the control lever. Yesterday, before taking off the top cover I tightened the nut on the control lever and it went back far enough to operate the control value. Today I messed with the draft screw and then I had to loosen the control lever nut to make the control lever go back. So one day tightening makes it go back and the next loosening makes it go back!

Oh, and I took the top cover off because I dropped my socket wrench under the pump. You can adjust those nuts without taking off the top cover with a 1/2" socket on a 1/4" drive ratchet, but tie a string to your tools!
 
Yep, my day didn't go any better. But I bought the DVD on massey hydraulics from the online store here, came in a couple days, atleast you can watch it over and over, and I am reading that chapter on every MF repair manual I have, but I just couldn't get anything done thru the porthole- being left handed didn't help- but I believe my problem is further back having to do with the ferguson system spring.... but I am thinking about welding a little tab to the lever that is suppose to push the pump roller further back. But I will try going by the book, just to teach myself how to do it.. by the book...
 
The adjustments are best done with the lift off for sure.......I'm a lefty too and I don't really think that has too much to do with it. You need a spring scale with small increments, I used a fish weighing scale I had in my tackle box. You adjust the nuts so that when the levers are in a certain position, it takes EXACTLY 3lbs of pull to make the control arms hit the back of the bracket..........it'll make sense once you have it off, I (almost) promise........I'm very careful with promises.
John (UK) has a very good set of written instructions which I for some reason can not find on my computer anywhere. You can send him an email or holler for him over on the Harry Ferguson forum. He'll email them to you.
 
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