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Thanks for posting the pictures, Pacer! I've got a couple of questions. Is the square tube going vertical by the grinder for 'parking' it? I want to do something on that order. I see your grinder flings the chips away from the tractor. A guy I talked to that built his own made the remark if he...

I seriously considered PTO driven but the extending boom is what threw me. I just feel more comfortable working with hydraulic hose vs a driveshaft that would have to be able to extend while turning plus angling left to right. Honestly, I don't have a lot of experience with 3PH. Thanks for...

Time to weld everything up and make a unit out of it. Also welded up the guard. The outside plate for it will bolt on the weld tabs set into the outer ring. I know this much, I won't be lifting this guy by hand anymore! Getting heavy. I have to get the structure for the 3PH finalized before I...

Won't argue with your reasoning. Can a stump grinder for a tractor be rented? But beyond that, I have a history of building things first before I ever operated them. For example, the first sheet metal brake I operated was one that I built, capable of 73" x 1/8" steel. Hydraulic. Took about two...

Welded up the adapter head and tacked it on the end of the boom for a test fit. Mounted the right angle drive and motor on plus the cutting wheel. I knew the clearance was somewhat tight and was happy that the coast is clear. Finished welding the adapter to the boom.

Does anyone know if there is a source for CAD drawings for my L3901?

Finished fly cutting the surface and then rinse and repeat for the other side. This will give me parallel surfaces for mounting to the 3 point hitch. I'm at the point where I have to bring the tractor into the shop and start finalizing the hitch design. Also have to remember to put a grease zerk...

Working on the yoke here. Didn't have any 1-1/2 thick wall tube left, so I had to use solid bar which means drilling and boring the hole for the pin. Then I started fly cutting the surfaces for where it will attach to the 3 point hitch.

Good point. Since I've never operated a stump grinder, I'm not sure where the critical points are. I know from watching videos that it's going to throw dirt and rocks and I'm keeping that in mind as I go. Maybe I'm overthinking this, but the swing portion is working constantly and I want a way...

I've got some Oilite bronze but I don't think this would be the right application. Thinking it would be be a magnet for dirt/ abrasives.

The graphite bronze idea I like. I think I remember seeing ones in the Bible (McMaster) that had 'dots' of graphite in them. My reasoning for plastic was because of dirt being an issue at this joint. I'll check out the graphite. Thanks!

Shop time is going to be hard to come by for the next several weeks, but I managed a couple of hours yesterday. Enough time to make the horizontal pin for the boom swivel. I threaded the end because I left an 1/8" on each side for a thrust washer, and as it wears this will be able to take up the...

Made the weldment for boom swivel. Next will be getting it on the milling machine to drill and ream the pin bore and also true up the surfaces where it will be pinned to the 3 PH.

A guy tired of the rat race of city life, bought a section of land in Alaska and moved up there to live off the land. Built a nice log cabin and got all settled in. Then one day there was a knock on the door. He opened the door to find a huge, burly man that could barely fit through the door. He...

Working on the pivot end of the outer boom. Made up the 'bearings' out of 1-1/4" steel round stock and also made a spacer to allow for clearance of the extension cylinder. The cylinder and pivot will be using a common pin, made out of 4140 x .750. I'm showing my little positioner that I use for...

Again, thank you for your reply. Very good stuff! Got some research to do.

Wow! Really nice of you to post such a detailed reply. You touched on something that I've got in mind for this build, and that is to try and make it easily removable. It looks like quick disconnects are going to be my friends on this one. I need to get the tractor in the shop to start measuring...

Thanks Vraz! Good Stuff! Yes, I got a Prince pump and yes, I noticed there was no way to retain it to the shaft. I glanced at their instruction sheet and see they recommend a torque arm or something like that. If you could sometime, please post a picture of how you mounted yours. Thanks for...

I'm glad you're enjoying my posts. I'm flattered at how many views this thread has received. I enjoy seeing things being built, and I guess I'm not alone. 'How It's Made' on the Science Channel is my favorite show to watch. I suspect many of you share my same passion.

I'm a semi retired metal fabricator/welder. That explains the water jetting and the forming. Machining is a hobby for me. Ever since I turned a piece of metal on a lathe in high school, I've wanted one. So now I have three, plus a mill and a surface grinder and a hone and.....? Always keep my...