Just read a very informative article in the latest issue of HPOCA magazine concerning the hydraulic system and use of single and double acting cylinders.  

I found this article helpful, especially since my three point doesn't function (it wasn't working when I purchased the tractor several years ago and the links and arms were removed) I have since replaced the external equipment and I have had the lift work once. I'll get to that in a second.

In one photo and in the text of the article it mentioned a plug by your right foot and if not turned in the three point won't work. I thought I might have this as my problem, but then I went and looked and my 1800 series B doesn't have this plug. Ah, but I do have an external hard line going between a port on the forward face, right side of the hydraulic switch pack and the top of the operators platform right where the back of your right foot would be.

Now, I did get my three point to work. I did it when I replaced my entire rockshaft housing.  It was an easier fix for the broken corner of the casting where the rearmost left side remote screwed in. (I bought the tractor this way, and JB weld doesn't last forever.)

When I swapped over the housing, I removed the aformentioned external tube that was between the right forward side of the hydraulic switch pack and the top of the operators platform. I installed the same hydraulic switch pack. Once back together I had my leak fixed and three point worked, but at the time I didn't know why. I soon learned.

When I went to use the remote to operate the cylinder on my haybine. It worked once. I was able to &quot;lift&quot; one time and &quot;lower&quot; one time, then nothing. It was as if the system was locked up. I hadn't fooled with either/any of the screws on the top cover, and prior to removal of the tube between top cover and top of operators platform the remote(s) worked fine.  So I put the tube back in.  Remotes work, but now I have no three point again, and I know that it has to do with this line installation. 

My operators manual shows a &quot;bypass&quot; valve that could've been installed to use single acting cylinders in this location, but I have no valve just a very well made flared line with matching fittings. I'm not using single acting cylinders, and my double acting works. I haven't tried it yet, but before I take out this line (and make a mess with fluid) again, I'm wondering if my interlock screws are the real culprits. I want to say that they look to be screwed out some. If I screw them in and remove this &quot;bypass&quot; line what is the chances that my three point will function and I will still be able use my double acting cylinder? Does screwing the interlocks screws out have any effect on the three point?

The article didn't make any mention of a &quot;field&quot; installation kit like what is shown in my operators manual (which is not necessarily for the series B) and in my I.T. shop manual. 

My tractor serial number puts it as a 1962 model. It has the earlier rockshaft housing with the filter on the side, which is the same as the original that I removed which also has the steering &quot;priority&quot; valve on the front.

Just having read about the &quot;quick way&quot; to switch between cylinder types and having this &quot;tube&quot; on my tractor with what I know about it has me thinking. I guess the next step is to go experiment. 

Great article.