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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF 65 hydraulic question.

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ozarkguy

05-18-2005 13:13:52




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Ok, recently bought a MF 65 diesel at auction. Steering wobbly, usual things, but run ok and hydraulics seemed to work.

Then I start getting leaks from around little plate that bolts with 2 bolts to cover on hydraulic resevoir. Enough leak it soaked right pant leg. Took it off and out comes long tube. Previous owner had tried to glue the plate on with silicone. Made it though auction so guess he succeeded for his purposes. Fine, made gasket and trying to get tube back in when whoosh, tube flies down to nether regions. Couldnt get it out with magnet on stick so off comes the top cover with the controls and lift arms. Tube jammed where I'd never got it with magnet. Well put cover on, tube in, and little plate back on. No hydraulics. Well lift arms showed tiniest little wobble, but no lift. Does this system need to be primed or something? Bolt holes all aligned, cover seems to fit properly though I took it off again just to see if I missed something obvious. Tube with o-rings properly seated both ends.

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ozarkguy

05-26-2005 16:46:34




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 Re: MF 65 hydraulic question. in reply to ozarkguy, 05-18-2005 13:13:52  
I pulled the big liftarm top cover off again. Tied a loop of fishline to hold control valve open. Set liftarm top cover back down, screwed couple bolts loose in their holes, then just ever so slightly lifted rear of lifthead, cut one side of loop of fishline and pulled it out. Then bolted everything down. Didnt have to drain oil or open side access cover.

Hydraulics now work. Thanks everyone who offered suggestions.

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buck01

05-20-2005 06:46:23




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 Re: MF 65 hydraulic question. in reply to ozarkguy, 05-18-2005 13:13:52  
when I put the top cover on it took two people. and had the right side cover off so you could see the levers are on the right side of the control lever.



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ozarkguy

05-20-2005 09:25:31




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 Re: MF 65 hydraulic question. in reply to buck01, 05-20-2005 06:46:23  
Well I dont have two people, but can rig way to do it with comealongs or something. Do you know which side the upper arms are of the lower arm with the rollers?



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Thomas

05-20-2005 15:30:40




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 Re: MF 65 hydraulic question. in reply to ozarkguy, 05-20-2005 09:25:31  
Lift it by a crane about the front seat bolt (7/16 UNC). The levers should be in front of the rollers. Have you set up the lift head while it was off? It's worth doing, not difficult but needs to be done carefully following the procedure in the manual. I sometimes wedge the control valve open (roller right back) when fitting the lift head, to ensure the levers go the right way around.



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ozarkguy

05-21-2005 06:25:12




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 Re: MF 65 hydraulic question. in reply to Thomas, 05-20-2005 15:30:40  
Thanks Thomas, I'm pretty sure this is the problem. I'll figure way to wedge the roller back and do this again. Really annoyed me that they want $30 for tiny little IT manual so didnt buy it or I would have my answer without posting here. I am still on lookout for a used one.

Get this done then onto getting incredible slop out of the steering (you herd this thing, you dont steer it), relining the brakes, and installing a front pump to use with loader off my old tractor. All fun projects from what I've read of this tractor.

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rednight (IL)

05-22-2005 04:30:22




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 Re: MF 65 hydraulic question. in reply to ozarkguy, 05-21-2005 06:25:12  
I had rebuilt my hydraulic pump in my 65 and it sounds like you have the correct advice. Now on to the steering. I had about a round and a half of slop in mine. Opened the side cover on the steering pedestal and found all the ball bearings had disintegrated. Pulled the steering shaft and cleaned up all the "mud" in the housing. You might be able to find the bearing and races as new parts somewhere, I could not. Instead I polished the races as good as possible and went to a hydraulic shop where they stock several different sizes of steel balls. Reassembled with wheel bearing grease to hold the bearings in place, refilled with new gear lube, made the adjustments and viola" steering like a new one. Also 30 bucks is cheap for a book if you are going to keep the tractor. I have probably got about a $1000 worth of information out of mine if nothing more than a schematic sometimes.

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ozarkguy

05-22-2005 17:04:04




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 Re: MF 65 hydraulic question. in reply to rednight (IL), 05-22-2005 04:30:22  
I dont much want to expand this thread into other subjects, but I would say I traced most of steering slop to that casting in front of radiator that hydraulic cylinder attaches to and which goes down to connect to pitman arm. There are no bearings and casting is way worn where it moves on shaft. Obviously somebody along line didnt regularly lube it. hydraulic cylinder for power assist also leaks some.

I dont like how this steering system is designed, no way, no how. First dang housing for steering gearbox is cast as part of lid for transmission. So I cant easily get rid of it to make space to re-engineer steering to truck type power sector. Also the manual box seems fairly decent shape. Something bit goofy as steering wheel shaft screws upward 3/4 inch when turned in one direction before steering is engaged. Otherwise seems fairly tight. That centered front pitman arm also makes adding external front hydraulic pump difficult.

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Thomas

05-19-2005 14:50:24




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 Re: MF 65 hydraulic question. in reply to ozarkguy, 05-18-2005 13:13:52  
Are you certain that you have the pipe fitted into the pump? It is easy to miss and think that you've got it right when you haven't. Take off the right hand side cover and feel inside (drop some oil out first. Another favourite if you've had the top cover off is to fit it with the levers from the lift cover on the wrong side of the pump control valve roller. Try operating the valve by hand to test. I think that the levers should be in front of the roller, but could be wrong... Ref your original problem, the plate should have an o-ring seal where the fluid travels back into the lift head to power the ram. This is probably missing, and as this runs at full system pressure silicone will not seal it.

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ozarkguy

05-19-2005 15:18:55




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 Re: MF 65 hydraulic question. in reply to Thomas, 05-19-2005 14:50:24  
I am pretty sure the tube is seated. I wondered about the roller and levers, but this cover weighs a ton, not sure how one makes sure anything is just so-so inside when letting cover down.

If something is wrong, would strongly guess rollers and control levers arent aligned right. How did you other folk who've had cover off get things lined up.

If I remove cover and just stick my hand down and pull on rollers would that shoot up oil?

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Ben UK

05-19-2005 07:23:37




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 Re: MF 65 hydraulic question. in reply to ozarkguy, 05-18-2005 13:13:52  
Link

Big deans website....hell sort you out! Email him, link on there somewhere.

Ben



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buck01

05-19-2005 05:06:00




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 Re: MF 65 hydraulic question. in reply to ozarkguy, 05-18-2005 13:13:52  
probably just missing the O-rings on either end of the stand pipe. The pipe that came out.

Make sure the O-rings are on there and the pipe is seated tightly inside the tractor and the little plate you took off.

You can also leave that little plate off and
make sure fluid is coming up out of the pipe.

it will be a little messy though.

I am no expert on this. I did however just rebuild my hydraulics.

Hope that helps.

Joel

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ozarkguy

05-19-2005 06:10:02




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 Re: MF 65 hydraulic question. in reply to buck01, 05-19-2005 05:06:00  
O-rings intact. Everything seated. I did try it with cover off. No oil coming up.



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Dale in WV

05-18-2005 17:35:15




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 You Need Big Dean! in reply to ozarkguy, 05-18-2005 13:13:52  
Dude - you need Big Dean. If he doesn't answer, Google him. You'll find his website.



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