mramend You are welcome. I suspect my problem was a low transmission oil level and cold transmission oil temperature. When the transmission oil was foaming out of the transmission vent cap (cold temp. 0 degrees F.) the snow plow barely moved up and down. It took a lot of hydraulic grinding sound to finally get the snow plow to move up and down. After the transmission oil change (John Deere Low Viscosity Hy-Guard) and transmission filter change, I run (warm up) the John Deere 445 tractor engine a good 5 minutes before I start working the snow plow hydraulic levers. No more transmission oil leaks and the snow plow hydraulic levers moved up and down smoothly after the 5 minute engine warm up. I tested again last week at -6 degrees F and no transmission oil leaks were observed and snow plow hydraulic movement was smooth and not stiff.
Hi I have an 09 X729 and I just replaced the control pump and put 7 quarts of low viscosity oil and it wines and nothing really works. Needing help to figure out if I need to bleed anything or release air out of the system, and how I do that?
+Joshua Woolley Hi Joshua, Yes, no more leaking issues after replacing transmission oil filter and transmission oil. I suspect the transmission oil was low and the cold weather caused the transmission oil to bubble up (transmission oil with lots of air bubbles - foamy) through the transmission oil vent and leak on the floor. In cold weather, I now let the engine and transmission oil warm up for at least 5 minutes before I start using the snow plow. With proper transmission oil level and warm transmission oil, I have not seen any transmission oil coming out of the transmission oil vent.
Thank you for sharing. This is exactly what I was looking for!
mramend You are welcome.
I suspect my problem was a low transmission oil level and cold transmission oil temperature. When the transmission oil was foaming out of the transmission vent cap (cold temp. 0 degrees F.) the snow plow barely moved up and down. It took a lot of hydraulic grinding sound to finally get the snow plow to move up and down. After the transmission oil change (John Deere Low Viscosity Hy-Guard) and transmission filter change, I run (warm up) the John Deere 445 tractor engine a good 5 minutes before I start working the snow plow hydraulic levers. No more transmission oil leaks and the snow plow hydraulic levers moved up and down smoothly after the 5 minute engine warm up. I tested again last week at -6 degrees F and no transmission oil leaks were observed and snow plow hydraulic movement was smooth and not stiff.
Hi I have an 09 X729 and I just replaced the control pump and put 7 quarts of low viscosity oil and it wines and nothing really works. Needing help to figure out if I need to bleed anything or release air out of the system, and how I do that?
Did you that fix the issue? I'm having leak and I'm trying to isolate it.
+Joshua Woolley
Hi Joshua,
Yes, no more leaking issues after replacing transmission oil filter and transmission oil. I suspect the transmission oil was low and the cold weather caused the transmission oil to bubble up (transmission oil with lots of air bubbles - foamy) through the transmission oil vent and leak on the floor. In cold weather, I now let the engine and transmission oil warm up for at least 5 minutes before I start using the snow plow. With proper transmission oil level and warm transmission oil, I have not seen any transmission oil coming out of the transmission oil vent.