PanicSync,
Welcome to the forum...glad to have you.
You are probably one of the few people that does have a service manual on here.
There has been a few discussions about the hydro oil, and as you said, regular 10W30 was the original.
Other owners have reccomended a synthetic 10W30 or straight 40 weight. I tend to think the heavier
straight 40 would be better. Here is a quote from another thread about changing the oil...
From fellow member Meofuse---
"There is a thread on this forum that I started early last summer with pictures included. I rebuilt the hydro on my YT6700 because of lack of maintenance by the previous owner. There is no drain plug in the hydro to drain the old oil but there are two ways to drain it if you are somewhat mechanical inclined. The first and easiest way would be to remove the filler cup that attaches to the unit and using a small syringe and small tube try to suck out the oil. You will find that this doesn't work very well and will not get all the gunk and dirt accumlated on the inside bottom. The second way is to raise the tractor so you can access the hydro. If you remove the rear tire on the side where you pull the lift lever for hydro neutral you can see where the lift lever actuates a small button on the hydro. This button actually opens a passage that allows the oil to flow freely in the unit to prevent damage if you need to move the tractor without the engine running. Be that as it may, the button is held in place by a hex nut. Loosen and remove the hex nut around the button... be careful there is a small spring in the unit, do not lose it! The oil will drain out. If you can, flush the unit with kerosene or something to remove the sediment, blow the unit out with an airhose and replace the spring/button nut/lever. The book calls for regular 10W/30 motor oil but I put a straight 40 weight in, it improves performance on the older unit and adds better wear protection."
Glad to see an original owner on here...especially with that nice service record.
Rattosh51
YT6800
Locked
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