Strange Hydraulic Fluid Cloudiness (Massey GC1725M)

   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #1  

hube2

Veteran Member
Joined
Sep 4, 2020
Messages
1,197
Location
Paris, NY
Tractor
Masey Ferguson GC1725M
This is about my Massey Ferguson GC1725M, but I don't really think it is specific to this tractor. Asking here in order to maybe get more input.

So this is weird to me. I have never seen cloudiness in the hydro fluid through the sight glass when checking fluid level either before or after running my tractor.

With winter I let the tractor warm up anywhere from 10 to 20 minutes before I use it. Recently I have developed a habit of looking at the glass after the warm up. This is something new. Until recently I would look at it before running and then again after shutting it down. It is when I look at the fluid after the initial warm up that I am seeing what appears to be cloudiness. I have tried wiping off the glass with my finger and this cloudiness appears to remain.

Another change is that I put a little red hydraulic fluid dye in to better see it. Just enough to give the fluid a pink tinge, but it is a dye recommended for hydro oil.

Anyway.
1) The fluid is clear before I start
2) The fluid appears a bit cloudy after sitting an warming up 10 to 20 minutes
3) After using the tractor, running PTO, moving the FEL, or anything that moves the fluid around for as little as 5 minutes the fluid is clear again.
4) Fluid is clear when I put it away, usually runs for at least 45 minutes up to 2 hours blowing snow and pushing, scraping, moving snow with the bucket.

I've read quite a few "cloudy hydro fluid" threads and my initial reaction on seeing the cloudiness the first time was that air was being sucked into the lines. But this doesn't make sense to me because it clears up after using the tractor for a short period of time. I'm thinking if air was entering from suction that it would remain cloudy.

It has been cold, below freezing above 0f when starting. Is it possible that the sight glass is just fogging up in the cold? That seems odd because it would need to be fogging up on the inside since I'm wiping of the outside and not having any effect.

Is it possible for air to get it when its cold but for it to seal up when it warms up? Maybe an o-ring on the suction line to be going bad? Even so, once the it's warmed up wouldn't the air still remain in the agitated oil for more than 5 munutes until it was given time to settle out?

Could this be a sign of condensation in the oil? And the water cooks out when it's warmed up?

I can't be sure if this has something to do with the dye making the cloudiness more apparent. I can't honestly say if I have or have not looked at the glass at this point in the past. I think I have, I'm a little **** that way. But the reason I've started making sure that I do is that I noticed the fluid was a little lower than expected after is sat for more than 2 months after getting it ready for winter before we got first snow here. I've been keeping a close eye on it to see if the level is going down.

Another thing I noticed regarding the low fluid after it sat is that the fluid level was higher immediately after starting the tractor, it went from less than 1/2 on the glass to nearly the top of the glass, which I found odd. Can this be a sign of anything?

Anyway, putting the question out there because I find it strange that it appears cloudy and then goes away. I will continue to monitor this, but at this point I'm not sure I should worry about it or do anything. Just curious if there are any opinions on what I am seeing or why.
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #2  
Maybe the hydraulic fluid is simply cold enough to be ever so slightly transforming into a solid (almost a slight waxy look). I've never had that problem myself, so I'm just guessing.

If it runs fine after the warm up, I wouldn't worry about it too much.

when the weather turns warmer, maybe pull out the hydraulic filter and see what it looks like; doesn't hurt to replace it.
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #3  
Cloudy oil could be due to water in the oil. But it can also be due to tiny air bubbles. After going through all the valves with the 3pt last, the oil dumps into the transmission. It can entrain air then. The bubbles would be gone by the time the oil reaches the pickup point at the bottom of the trans.

Keep in mind that the sight glass is at the back which is where the oil dumps in. So it's close to the source of the bubbles. The pickup is about 6 feet forwards, at least on my Branson. The glass being close to where the oil dumps in would also explain the higher level when the tractor is running.
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #4  
Could it be that the cold oil entrains some air because of the higher viscosity and then releases the air once warm and thin?
Eric
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #5  
The hydraulic reservoir on our Kubota B2910 is vented. The vent is under the seat and consists of a short molded rubber hose shaped like a shepard's crook, which is attached to a nipple, with the downward facing portion with the hole in it serving as entry/exit point for air.

Eventually, after 12+ years or so, the hose rotted away at the bend, leaving a hole facing upwards.

Since the unit is left outside a good bit, I am prone to leaving the seat up and resting on the steering wheel ... so it won't be wet when I go to use it.

Of course, that left there now rotted off breather hose out in the elements and rain water found its way in.

Caught it before it was too bad and replaced the breather hose.

IIRC, it was about due for fluid change anyways.
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #6  
Could it be that the cold oil entrains some air because of the higher viscosity and then releases the air once warm and thin?
Eric

I like Eric's idea. In the JD 310 I'm trying a different hydraulic oil this year, and on one cold day this winter I started it and got an immediate automatic shutdown with a warning message about low oil in the suction line. A restart worked ok, but I figure that the original warning was real, and probably due to hydraulic oil viscosity being too high to be sucked into the pump. Some oil must have moved and that is why the restart went OK.

I didn't check the sight glass and proabably should have. But if what happened was viscosity related, then suction from the pump would create a situation where if I did have an older O ring or connection then it is conceivable that some air might leak in and microbubbles cloud the cold oil......the bubbles would then dissipate as the oil warmed and circulated.

All speculation of course, but on your Massey you might just keep an eye to see if the cloudiness is related to cold oil.
rScotty
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #7  
I have had JD hy-guard cloud in COLD weather.

76 brand tractor/hyd. Oil would cloud also in the cold.

Both clouded in original buckets

I asked the 76 bulk dealer about it and they reassured that there was nothing wrong with the oil.
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #8  
I’ve been using Amsoil Tractor Hydraulic Transmission oil since the factory fill break-in oil was changed. Sent a sample for analysis at 400 hours and it was good for continued service, so I just changed the filters. Will check again after 300 hours? The oil always looks clear even after 2hours of blowing snow or 3 hours cutting grass. I checked the info online and one feature mentioned was “rapid air release” amongst multiple other features. Is that mentioned with other brands? Not sure, but I’m very happy with it, especially the fast hydraulics with only just a short warmup in our cold Canadian winter temperatures. Not cheap but if I can extend the change out for 2/3 times, it’s more than worth it to me. I’ll try to post a picture of the info…
 
   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M) #9  
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   / Strange Hydraulic Fluid Cloudiness (Massey GC1725M)
  • Thread Starter
#10  
Thanks for the input on this so far. I'm going to keep watching it and see what happens. Next time I use the tractor I'm going to watch the oil while is it warming. I want to get a better idea of when it starts to appear cloudy and then when it clears up. I'm also going to try to take some pictures of it but I'm guessing that will be difficult with the position of the glass, but maybe if I can get enough light in there.

Unfortunately updates may be long in coming. It's been a relatively light winter this year, I have only put 11 hours on the tractor so far this winter. By this time last year I had done 4X that.

This all could be completely normal for winter operation, who knows. I doubt many people look at the fluid while it is basically in the process of warming up when it's sub freezing outside. If I had not been worried about the possibility of an fluid leak I'm sure I never would have noticed it. But the level has stayed steady since I noticed it was a little low and topped it off, and that could simply have been contraction of the fluid in the cold, it only takes about a cup of fluid to go from the bottom of the glass to the top.
 

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