Stump grinder build

[Yooper]

I'll be powering it with a separate pump driven by the PTO. I bought the pump and motor from Surplus Center and used their guide to match them up. It will have around a 30 gallon reservoir which I'm hoping will handle the heat issue. There will be a thermometer sight glass so it can be monitored.

I need to do some research as far as the valving goes. The double acting cylinders will operate with spool valves, but the motor and lock cylinders for the boom...I'm open for suggestions from those of you with more experience than me.

Appreciate the questions, Wolfman! One of the reasons I'm posting this build is to get feedback from a 'second set of eyes'.

 

[Yooper]

Working on the outer boom, which is 5"x4"x3/16" rectangular tube. Welded the reinforcement collar on the end and the mounting blocks for the lock cylinders.

Next was the boring and reaming holes for the lock cylinder end caps (pictures forthcoming). Also drilled and tapped the holes for the cylinder mounting blocks.

 

[Lil Foot]

Question: Why bore AND ream? Why not just bore to size? Just a procedural question, both will get the same result, just wondering; always trying to gain new insight into such things.

 

[Yooper]

Boring cleans up the hole and makes it round. If I didn't have a reamer, I would bore it to size.

The reamer makes sure you're at the proper size with a good surface finish. That is, as long as you don't try and remove a lot of material with it. I like to bore to .010" under size and finish with the reamer.

 

[RCW]

Yooper - all I can say is WOW!

Wonderful workmanship!

Best wishes!

 

[William1]

I have to say, it is terribly nice of you to be making me one as a gracious gift for my coming birthday. How do plan to get it to me by next week?
You are aware, in return, I will be giving you my wife. She is 63 and I cannot get a lot of work from her anymore but you might find some use for her.

I can bend metal with pliers......................

 

[Tooljunkie]

I knew nothing about machining, i still dont know much. But being able to make a bushing or make something round or concentric has been a necessity.

So i bought a lathe, built in 1947. I thoroughly enjoy making swarf.
Cutting,threading boring and the dreaded parting are all unique in the process of making a part. Especially rewarding when you thread that part and it works.

I appreciate fine workmanship, i see that here in this thread,and the steps to achieve your vision. Great work.

 

[Lil Foot]

Boring cleans up the hole and makes it round. If I didn't have a reamer, I would bore it to size.
The reamer makes sure you're at the proper size with a good surface finish. That is, as long as you don't try and remove a lot of material with it. I like to bore to .010" under size and finish with the reamer.

Gotcha. You must have a more complete set of reamers then I do, and I guess I'm lazier- once the boring head is set up, I usually just finish the hole with it, rather than do another (albeit minor) setup.

 

[Yooper]

Found these single acting cylinders with spring return on ebay. Also found a brand new Greenfield 1-1/8-14 tap on there also for a decent price, which was the thread size for the cylinders.

Surface ground 3 flats on the tap so I could use it in the drill chuck to tap the holes on the mill. Definitely going to take some grunt to get it through.

Drilled, tapped, and counter bored the plates for mounting the cylinders and these are ready to go.

 

[Lil Foot]

Nice work! I'm just guessing here, but not your home garage shop?

 

[North Idaho Wolfman]

I'll be powering it with a separate pump driven by the PTO. I bought the pump and motor from Surplus Center and used their guide to match them up. It will have around a 30 gallon reservoir which I'm hoping will handle the heat issue. There will be a thermometer sight glass so it can be monitored.

I need to do some research as far as the valving goes. The double acting cylinders will operate with spool valves, but the motor and lock cylinders for the boom...I'm open for suggestions from those of you with more experience than me.

Appreciate the questions, Wolfman! One of the reasons I'm posting this build is to get feedback from a 'second set of eyes'.

Thank you, Excellent answers!

You could add a electric fan and a simple transmission style cooler if too much heat becomes an issue. Just tee off of the return and put a little fluid flow through the cooler to drop temp dramatically.

For valving to run the motor drive I would look at electric over hydraulic, in fact you could do all the controls for your stump grinder with electric over hydraulic and be able to control the whole thing from one joystick, and all off of it's own hydraulic system.
Just something to think about.

 

[Yooper]

Nice work! I'm just guessing here, but not your home garage shop?

Actually, it is. Started out as 24'x30' and added on to make it 24'x60'.

 

[Yooper]

Thank you, Excellent answers!

You could add a electric fan and a simple transmission style cooler if too much heat becomes an issue. Just tee off of the return and put a little fluid flow through the cooler to drop temp dramatically.

For valving to run the motor drive I would look at electric over hydraulic, in fact you could do all the controls for your stump grinder with electric over hydraulic and be able to control the whole thing from one joystick, and all off of it's own hydraulic system.
Just something to think about.

Thanks Wolf! I'm going to research the joystick thing.

 

[North Idaho Wolfman]

Thanks Wolf! I'm going to research the joystick thing.

If you don't find what you need, or need more info, shout, I know some places to look.

 

[Lil Foot]

Actually, it is. Started out as 24'x30' and added on to make it 24'x60'.

Impressive, and chocked full of equipment looks like. Color me green.

 

[Yooper]

One thing I noticed on my right angle drive, the vent was going to be in a bad position. So I took it apart and drilled and tapped for a better location.

Taking it apart gave me a chance to study the inner works a bit. The shaft, gears, and especially the bearings seem OK. The casting has got me a little concerned, but we'll just have to see.

 

[skeets]

Yeah what lil foot said

 

[mdhughes]

Impressive, and chocked full of equipment looks like. Color me green.

Wouldn't that be on another forum? I would think you would want to be colored orange

 

[Lil Foot]

Wouldn't that be on another forum? I would think you would want to be colored orange

 

[D2Cat]

Maybe the green was meant as, in green with envy?

Yooper, you need something heavier, I have one off of a big round Hesston baler!