Re: Re: Largest IH plow in production

Posted by Bleedinred on March 11, 2002 at 18:39:59 from (67.227.213.190):

In Reply to: Re: Largest IH plow in production posted by Hugh MacKay on March 11, 2002 at 02:34:36:

Thanks Hugh, IH made the only 4-way leveler for years starting with the 151, the 403 and the 453. Four-way leveling was discontinued with the development of the 1470. The leveling was strictly mechanical/hyd. and used a pendulum to the right of the operator's platform. The bottom of the pendulum, or counterweight, was dampened by hyd. oil and it's flow was governed by a control valve. Leveling valves were further up the pipe and to make it level faster you opened up the flow valve a little more. Too much and it would "hunt" back and forth or front to back. When going uphill the hind end would be stretched way out and looking back at that frail set up made you wonder how long it would last, but it did pretty good. When the 403 came out with hydrostatic drive I think a lot of guys breathed a little easier as it made handling so much better. Shifting gears on a steep corner could sometimes get a little tricky. Yes, they do (did) slide off the hills sometimes, notably on the real steep grass fields. Usually OK until drive wheels get on loose straw then it's wake up time.

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