John i got an operators manual, form 432 204, dated july 1969. it has a good bit of info. mine has early style remote handles, i think Hydra-Lectric-stop control. Reason i beleive so, is there are switches on top of remote handles, and one cable on left side of hydraulic unit. coming out of something.?!? on hydro unit. There are hydraulic/wire schematics in manual for class 2 &amp; 3 lift systems in it.

 Maybe i should drive tractor back here to house, so we can talk on phone. my tools are here at home, books here, phones here. farms 10 miles  away from where i actuall live. 

Serial info of tractor 275 211099,  186-926-428

know when i plowed with it last year the draft control didn't really respond, i had to manually keep draft control with lever.

Link to post here with remote on left side ports to single acting main beam cylinders:
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Plus i will try to get better pics of bucket setup and plumbing to email to you. So you can see what i am talking about as we talk. if good with phone session i will go get tractor this weekend. have it here for when you get time. Thanks. Bill