[AT] Spam> Hydraulic Oil Ffoaming

Wed Sep 16 06:45:06 PDT 2015

My old Allis tractors have high pressure (3500 psi) piston
pumps and they use 20 wt auto transmission fluid or hytran.

Charlie

-----Original Message----- 
From: Cecil R Bearden
Sent: Wednesday, September 16, 2015 8:49 AM
To: Antique tractor email discussion group
Subject: Re: [AT] Spam> Hydraulic Oil Ffoaming

The old 65 had multi power and used the PMO, The mf135 had the piston
pump in the sump, so I would use PMO if it were mine.

Cecil in OKla

On 9/16/2015 7:22 AM, Chuck Saunders wrote:
> The need for PMO is due to brass components and an incompatibility with
> additives in later formulations. I have gotten it from NAPA though it did
> have to be ordered into the store.
>
> On Tue, Sep 15, 2015 at 11:41 PM, Scott Williams 
> <swillia5 at rochester.rr.com>
> wrote:
>
>> So would my '72 MF 135 use the PMO?  When you asked if it was a 35 
>> Deluxe,
>> I
>> thought of Multi Power, is that the reason a Deluxe needs the PMO?  I 
>> don't
>> have that, just the 6 forward, 2 reverse.
>>
>> Scott in Brighton NY
>>
>> -----Original Message-----
>> From: at-bounces at lists.antique-tractor.com
>> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Cecil R 
>> Bearden
>> Sent: Tuesday, September 15, 2015 7:02 PM
>> To: Antique tractor email discussion group
>> Subject: Re: [AT] Spam> Hydraulic Oil Ffoaming
>>
>> Charlie:
>> Most all of them used the PMO 90 Fords and Ferguson and MF until MF 
>> started
>> using the engine  mounted pumps and ford when they started the
>> 1000-5000 series.  The old ferguson system with the piston pump in the
>> bottom of the rear end used PMO 90.  The easiest way to remember was the
>> piston pumps used the PMO...
>>
>> Cecil in oKla
>>
>>
>> On 9/15/2015 2:51 PM, charlie hill wrote:
>>> Cecil,  I never knew the Deluxe model used mineral oil.
>>> If I remember right that is the same thing you run in Fuller
>>> Roadranger transmissions.
>>>
>>> Charlie
>>>
>>> -----Original Message-----
>>> From: Cecil R Bearden
>>> Sent: Tuesday, September 15, 2015 2:20 PM
>>> To: Antique tractor email discussion group
>>> Subject: Re: [AT] Spam> Hydraulic Oil Ffoaming
>>>
>>> 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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