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Re: Re: Re: FastHitch depth control question
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Posted by Hugh MacKay on December 26, 2002 at 08:01:12 from (209.226.106.33):
In Reply to: Re: Re: FastHitch depth control question posted by REDinMINN on December 26, 2002 at 06:28:42:
You are getting some confusing information on this matter, First the 300 and 400 series were the only ones with two cylinders on system from factory. The second cylinder lies just to the right of torque tube, kind of under the brake pedal. This cylinder was nothing more than a depth controll and not a draft controll. All that cylinder did was raise or lower the front of hitch pivot. The 350, 450, 460, 560 and others of those series had only one hydraulic cylinder. There was a pull up lever at rear left of platform with D type handle which could be pulled straight up or down. It changed a cam at base of lift cylinder. There was a mechanical linkage from cylinder to your controll valve. Some of these were a series steel rods and pivots and later ones were an enclosed cable linkage. The hydraulic controll valves for these used the same housing as regular valves. The difference being, there were external hookup levers on both sides. One side was hooked to your controll lever, while the other side was hooked to that linkage coming from your lift cylinder. Inside the controll valve there was a differential type gear connecting the two input levers. Unlike the 300-400 this system gave you true draft controll. I will warn you that this differential gear seemed to give a lot of problems when these tractors were 15-20 years old. The differential gears seemed to be hard to come by and many of these valves were converted to regular valves, thus no more draft controll. I hope I have covered it all and I hope this helps.
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