[AT] Spam> Hydraulic Oil Ffoaming

[Dennis Johnson]

Cecil,

Thanks, I bet that is the issue. It was low and I topped off with gear oil, since that is all I could find at Tractor Supply, or similar place.
Where do you get the mineral oil??

Thanks,
Dennis


Sent from my iPad

> On Sep 15, 2015, at 1:23 PM, Cecil R Bearden <crbearden at copper.net> wrote:
> 
> I would also bet its water in the oil instead of really foaming.  The 
> gearshift boot and the top link shaft into the tip deck are the 2 places 
> to get water in.  Try to keep the tractor out of the =weather if at all 
> possible.
> Also, if it is a  35 Deluxe, it requires PMO 90Wt  This is a Pure 
> Mineral OIl 90 Wt.  303 fluid and MF1129A is20 wt.  90Wt gear oil is 
> equal to about 50 wt motor oil.  It must be Pure mineral oil or it will 
> foam. Gear oil like GL5 will foam. The screen should be located between 
> 2 "cups" one on top and one on bottom and held with a bolt with a tab on 
> the head to remove it.  I worked in the local MF dealership while in 
> H.S. and college from 68-75, back there in the old days....
> 
> Cecil in OKla
> 
> 
> 
> 
>> On 9/15/2015 11:00 AM, charlie hill wrote:
>> Dennis,  Bo's advice is sound but one thing you can
>> look for.  If it sits completely unused until you get back to it,
>> before you start it up take the drain plug out.  The fluid will
>> have had time to completely settle out and if there is water
>> in the system it will come pouring out first, followed by the oil.
>> If you drain it like that and let some of the oil out, then put the
>> plug back in, top it off and try it and see if the problems is gone
>> or improved.
>> 
>> I don't have a lot of MF experience but I've had water get into the
>> hydraulics on my Allis tractors and was able to get it out using this
>> method.
>> I agree with Bo, changing it out is good advice.  Either way drain it before
>> you ever start it up and the water and crud should come out first.
>> 
>> Charlie
>> 
>> -----Original Message-----
>> From: Dennis Johnson
>> Sent: Tuesday, September 15, 2015 10:11 AM
>> To: Antique tractor email discussion group
>> Subject: [AT] Spam> Hydraulic Oil Ffoaming
>> 
>> I have a MF35 Deluxe on Oklahoma. 3 point used to work fine a year ago, but
>> get weak and slow after 2 hours of use. Now it works for 10 to 15 minutes
>> and then the oil foams and lift stops working until after it sets and the
>> foam goes away.
>> I have checked the screen and it seems to be OK by feeling around it, but
>> have not taken it out. Feels like it is wired in place. Oil level is fine.
>> I wonder if there is condensation in the oil causing the foaming.
>> I also wonder if the relief valve is dumping oil and that is causing
>> foaming.
>> I have not had enough time in Oklahoma to spend a lot of time trying various
>> things. Next time there I plan to completely drain the system and reseal
>> covers that are leaking.
>> 
>> Any thoughts on why this is foaming?
>> 
>> Thanks
>> Dennis
>> 
>> Sent from my iPad
>> 
>> Sent from my iPad
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