Oil & Fuel GC1715 Blowing hydraulic fluid

DMW · Jul 3, 2022

The most likely spot to get air in the suction side is the strainer/filter behind the left rear tire. There is an o ring on the tractor side of the housing that may not be installed correctly. It may not leak oil, but could allow air to enter. If you just did a fluid change, I would assume you removed it to clean the strainer. There are videos of it on YouTube.

Coyote1 · Jul 3, 2022

No I didn't remove i took it out the last time I did service and it looked like new so this time I didn't remove it.

DMW · Jul 3, 2022

Coyote1 said:
No I didn't remove i took it out the last time I did service and it looked like new so this time I didn't remove it.

Unless the fluid is looking a little milky, I would doubt an air leak. Check the filler cap. They are poorly constructed for a $25 part.

Just curious, what hydro fluid are you using?

Coyote1 · Jul 10, 2022

Drained fluid and changed the filter again put a new filter on it again this time put the filter on that matched the one I took off turns out it fits the GC2300 it is about a inch taller. That didn't help turn out I think it does it when I run on a hill on my property. Talked to mechanic at local dealer said he never heard of one doing that.

Coyote1 · Jul 10, 2022

Did like this tractor a lot, now thinking about trading for a new one .

DMW · Jul 10, 2022

Did you try opening the vent hole on the filler cap? The pressure builds in the hydro housing, can blow out the sight gauge, and eject oil out the fill tube when going up hill.

Oil & Fuel - Gear Case Vents on MF GC1720?

I Just purchased a new 2018 GC1720. So far the tractor has performed flawlessly. I have about 10 hrs on the tach and decided I should look the tractor over for any issues. When I removed the fill cap for the transmission I was surprised to hear a good bit of pressure escape from the filler neck...

www.tractorbynet.com

Coyote1 · Jul 10, 2022

Pushed a toothpick in hole at the side of cap and could see it from bottom of cap

DMW · Jul 10, 2022

Coyote1 said:
Pushed a toothpick in hole at the side of cap and could see it from bottom of cap

Was there a lot of resistance?

DMW · Jul 10, 2022

Early version of the GCs also had a breather hose that seems to be missing on the GC1705/10. They never suffered from these issues. From what I know, the only vent for the transmission case now is the filler cap. It is poor quality.

WranglerX · Jul 11, 2022

There is about a 1/16 hole in cap/plug that directly connects to bottom side of plug for vent, if you can take something like a can of WD 40 or PB Blaster with a wand and blow product through hole, venting is not your problem....

IF you change filters and problem did not go away, filter is not your problem....

Only other way to change volume of hydraulic fluid if it is drawing air in some place and aerating fluid enough to change volume in HST drive and the only way extra volume can excape is through cap/vent ....

Coyote1 · Jul 23, 2022

It blowed fluid out again today so I emptied the tractor and checked the intake screen and it was clean. Is it possible
the fluid is bad that is the only thing that is different from when it worked.

Coyote1 · Jul 23, 2022

I smelled oil so I stopped the tractor and got off and I could see the fluid coming out of the vent hole slowed the RPM down and it stopped.

DMW · Jul 23, 2022

Coyote1 said:
It blowed fluid out again today so I emptied the tractor and checked the intake screen and it was clean. Is it possible
the fluid is bad that is the only thing that is different from when it worked.

What fluid did you use?

Coyote1 · Jul 30, 2022

Permatran 821XL SEMI SYNTHETIC
The old didn,t say semi synthetic on can

Coyote1 · Aug 8, 2022

Coyote1 · Aug 8, 2022

Shot video and uploaded pictures you can see sight glass isn't full but fluid is coming out fill tube.

K5lwq · Aug 8, 2022

When you changed the fluid how many quarts of hydraulic fluid did you add? Did you have the loader on the ground or extended?

Best I can tell it should be 11 Liters. It is difficult to see clean oil sometimes in a sight glass. May try some dye to help you see it.

hube2 · Aug 9, 2022

Seeing the last images you posted my immediate reaction is that you have some kind of blockage inside the transmission that is preventing the fluid from flowing properly. The transmission is separated internally into sections and there are ports between these sections that allow fluid flow. Fluid returns to the top compartment that is connected to the fill tube. There is a port between this compartment and the one below it where the sight glass is located. This makes me suspect that there is something blocking that port.