In Reply to: Re: Shiftr boot myth debunked! posted by Bruce (VA) on November 18, 2017 at 07:20:44:
Yes, the Draft Control Spring, p/n 9N-547 on the 9N-500/8N-500 Lift Cover assembly has but the one felt washer, p/n 9N-529 between the outside and internal access to the hydraulic system. It has always been the major focal point of water contamination. I wish to add too that I have worked on a few tractors that came to me with no hydraulic oil dipstick at all or some type of ho-made device and water can easily get in thru there too. One guy had the dipstick port stuffed with a paper towel. That is like putting a magnetic sponge there and acts like a wick. We can't control engine condensation but can ensure other precautions are met. Keep tractor stored inside the barn or tractor shed or garage when not in use. Keep it covered if it needs to be stored outside, especially the rear end/seat area with spring assembly. Lastly, periodic preventive maintenance -checking the oil level and condition every time you go to fire up the tractor for use. Once oil starts looking contaminated, it is time to drain, check system, and refill. Good clean oil will be a clearish, honey-colored shade and consistency. Water contaminated oil will be a murky brown, and really bad will be whitish. I recently worked on a guys 9N and when I pulled the dipstick, I asked him facetiously if he had any biscuits as the oil on the dipstick looked like gravy -white and brown and just as lumpy and thick.