MF 165 lift issues

Mike476 · May 5, 2011

Roger that, good luck.

SB farm guy · Jun 1, 2011

Well, back now with an update. Filter replacement did not change condition (still shakey and weak). Pulled top plate, ready to pull pump. MP may or may not force splitting tractor, though I am an optimist, and there does not seem to be a solid concensus about the question on line. I will if I have to, but would rather not.

SB farm guy · Jun 2, 2011

No Go on removing pump without splitting. Just not enough room to get it out, and probably hopeless to get it back in and lined up if I did. So... next I get to spilit my tractor. It is clear that pump removal and reinstall will be much simpler that way. On the good side, I now know a lot more about the machine than I did.

Mike476 · Jun 3, 2011

That's too bad, but like you said you'll have had the chance to take a good look at your tractor, especially after you've split it.

Mike476 · Jun 22, 2011

SB Farm Guy, was welding on a repair to my back blade this afternoon and was wondering what you may have found with your 3 pt problem.

cowski · Jun 22, 2011

i would hook a pressure gauge to it and check the pressure before i pulled the pump. your problem sounds like the cylinder o rings need replacing.

SB farm guy · Jun 23, 2011

Hello again. Thanks for thinking of me Mike476. Quite an adventure. I split the tractor, put a rebuild kit in the pump, and managed to get it all back together. Now nothing in the way of hydraulics at all. Did some troubleshooting (dont have pressure gage), and found no oil up standpipe at all. I have verified the stand pipe is seated, not cracked and orings are good. I know the pump is pumping since it rains inside the case (led me to double check stand pipe). Also know zero oil is getting up the standpipe, I looked at it with diverter valve off and tractor running, and did not get wet. I conclude it must be adjustment of the control valve or perhaps the pressure control is dumping everything back to tank.

I will have to drain some oil and go back in the side to see if I can figure it out, wish I had Big Dean's tutorial, but not luck laying hands on it.

Anyway, had to bale hay, and need the 165 to run the baler, so have been out getting some seat time without hydraulics. Tractor runs so well, it almost makes up for the anquish.

Fight the good fight

Farmwithjunk · Jun 23, 2011

SB farm guy said:
Hello again. Thanks for thinking of me Mike476. Quite an adventure. I split the tractor, put a rebuild kit in the pump, and managed to get it all back together. Now nothing in the way of hydraulics at all. Did some troubleshooting (dont have pressure gage), and found no oil up standpipe at all. I have verified the stand pipe is seated, not cracked and orings are good. I know the pump is pumping since it rains inside the case (led me to double check stand pipe). Also know zero oil is getting up the standpipe, I looked at it with diverter valve off and tractor running, and did not get wet. I conclude it must be adjustment of the control valve or perhaps the pressure control is dumping everything back to tank.

I will have to drain some oil and go back in the side to see if I can figure it out, wish I had Big Dean's tutorial, but not luck laying hands on it.

Anyway, had to bale hay, and need the 165 to run the baler, so have been out getting some seat time without hydraulics. Tractor runs so well, it almost makes up for the anquish.

Fight the good fight

I've got a copy of the Big Dean Austin MF100 series CD. (NO, I wouldn't part with it for love nor money...) I WILL however, spend some time with it this afternoon and see what he has to say. (The world is not the same place without Dean here with us)

I'm voting for relief valve issues at this point. What takes place when you pull position lever all the way to "constant pumping" position?

Mike476 · Jun 23, 2011

Fight the good fight is right, and cudos to you my friend for having not given up. Does sound like it could be a control valve issue, hopefully FWJ will be able to provide you with a little direction, great forum isn't it!

Regards.

SB farm guy · Jun 23, 2011

FWJ, Thanks. When troubleshooting, lever position had no effect at low rpm (some turbulence in sump), but at higher rev, splashing and falling fluid from above was visible through side plate, and more so when lever raised. We lifted the top again at that point and double checked standpipe and orings. bottom had cracked plastic spring ring, so we replaced both that and the oring there. splashing could have been a guyser from bottom of pipe or maybe from pressure control valve dump, hard to be sure.

This pump has no relief valve, I assume it is using the hitch "pressure control" feature to do that part, since the parts manual shows a variant with a plug where the relief should go like my pump has. The manuals simply dont tell you.

After reassembly, no more success, and have not been back in the side to see about leaks. standpipe did seem to be very well seated top and bottom.

The rest we know is that although I did not replace the lift piston or rings, and it MAY leak (arms did drop when shut off, so it probably does some) it has not had a chance to do so, and that was not the source of the "rain" we saw, since no fluid was making it up the standpipe. Thus my two hypothetical conclusions.

Mike472, you are right it is good to have someone to discuss this stuff with. looking back over the old threads on various sites, I am certainly not the first person to have such trouble.

As for Big Dean, I was not lucky enough to have known him, I came along too late. His impact is still clearly seen, however. It is obvious he is missed, that seems a good legasy to me.