cabover4us
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- Back in Salem, New York
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- 1987 john deere 855 sold and bought a YT235 Yanmar, love this tractor
I reread your post only to find the info you stated, my apologies on that..
John Deere 855 Hydraulic Oil Leak
- Thread starter samcritton
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samcritton
New member
cabover4us,
I purchased a kit from here: Snow Blower Impeller Blade Modification Kit
My model has 3 impeller blades. This really helped improve the performance. It was a little tricky to install. I had to remove the chute and use a 90 degree angle drill to drill holes in the metal impellers (which is thick metal). It took me a couple of hours, but the improvement was totally worth it.
I purchased a kit from here: Snow Blower Impeller Blade Modification Kit
My model has 3 impeller blades. This really helped improve the performance. It was a little tricky to install. I had to remove the chute and use a 90 degree angle drill to drill holes in the metal impellers (which is thick metal). It took me a couple of hours, but the improvement was totally worth it.
TractorGuy
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- N. FL
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- John Deere 4310 CUT, Ford New Holland 575E Industrial Backhoe, John Deere F725 Front Mount Mower
A little late to this discussion but the first thing to check on any type oil leak is your vents. In the case of a hydraulic leak on the 855 the vent is a curved tube beside the fill hole right behind the seat. It has an 1/8 pipe thread so you can grab it with a pair of pliers and unscrew it. Mine has the auxiliary hydraulics so I had to use a small screw driver and bend it up just a little to clear that while unscrewing. If you have this be careful to bend it only the amount needed and don't break it off at the threads. If it were to break you should be able to get the threads out with an extractor.
Mine was hissing at the speed input shaft after running and getting things hot but not leaking oil out yet. My vent tube was totally clogged. I had to dig with a wire and spray in both ends with brake cleaner till I got it opened up and cleaned out. I may replace the tube with a hose barb fitting and put a small engine fuel filter on it one day.
Have seen similar problems on other machines. Had the axle vent on my Mustang stick shut and the same thing happened on a Z06 Corvette I had. Both caused axle seal leaks that went away after fixing the vents. Those both had a rubber disc with a spring on top so they should function like a check valve but the rubber would stick to the seat and fail to open under pressure.
Mine was hissing at the speed input shaft after running and getting things hot but not leaking oil out yet. My vent tube was totally clogged. I had to dig with a wire and spray in both ends with brake cleaner till I got it opened up and cleaned out. I may replace the tube with a hose barb fitting and put a small engine fuel filter on it one day.
Have seen similar problems on other machines. Had the axle vent on my Mustang stick shut and the same thing happened on a Z06 Corvette I had. Both caused axle seal leaks that went away after fixing the vents. Those both had a rubber disc with a spring on top so they should function like a check valve but the rubber would stick to the seat and fail to open under pressure.
