Well I am late to this post. So here goes. The JD 4630 is an OK early higher horse power tractor. What I mean by that is they did not have many issues but has some limits. The main one being they had a poor torque curve. If you lugged them much under 1800-1900 they fell on there face. So that means IF your doing tillage you need to be able to change gears. Therefore the Power shifts and Quad range transmissions are the most desired. There where a fair number of the JD 4630s with the 8 speed syncro range transmission. I have bought/sold/traded 3-4 of them. They mainly where sold in the south but you do see them in the Midwest. The 8 speed synrco transmissions was the cheapest. The positive is they where pretty rugged. The negative is they usually where the "big dog" on just about any farm they were in when they were newer. So they got the hard jobs and usually where turned up too. The majority of them around here where running 200 HP. That is pushing a JD 404 a long ways. So they can be pretty beat in the motors/transmission/rear ends. They also where 1 3/8 1000 PTO only. So no 540 PTO. They had the early sound guard cab so with working AC they are not a bad ride.
Now for value. The JD 4630 is the cheapest 30 series tractor in value. A JD 4230 or 4430 will out sell them. The 1000 PTO kills them. Then you add in the one your looking at having the 8 speed syncro it is not a high value tractor. If it is in perfect shape with shiny paint and an overhaul engine your still talking around $10,000 top end. I have seen good running but poor paint and cab rough one not bring $6500-7500. Even then they do not have buyers fighting over them. Heck pretty nice JD 4640s are hard pressed to go for much over $12-14K now at private sales.
So if you want it for mainly 1000 Rpm PTO work and can get it for the $8-9K then it would be an OK deal. Much more money than that and I would pass. You can get a newer better tractor for a little more money.
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