When the engine is shut down the oil returns out of the hydrosatic drive section slowly. This section is normally completely full when engine is running. So, if you check oil level shut off the dip stick will read way over full. If you shut it down and check it right away you will have a pretty close check but you will have to be pretty fast and probably do it a few times running it for a few minutes and shutting down to establish a reliable reading. It is supposed to be checked after engine has run a few minutes and while engine is still running, but if you cannot do that then you can't. I would not recommend returning oil into that filler port though as it will cause aeration and that is second worse situation for a hydrostic transmission behind dirt. The normal return flow from the aux valves on all the 656 series is directly back into the suction tube in the rear end. If it is impossible to use one of the aux valves to return oil I would at the very least return it below the oil level in the rear to minimize airation.
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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