I just picked up this free simplicity walk behind and hope to make a
small stump grinder. I looked at the 2 machines the local rental place offer
and the simplicity looks to be more stout than the smaller grinder.
take a look at the simplicity
http://www.motherearthrecycling.net/sim/sim.htm

I will post pictures of my success or

I just picked up this free simplicity walk behind and hope to make a
small stump grinder. I looked at the 2 machines the local rental place offer
and the simplicity looks to be more stout than the smaller grinder.
take a look at the simplicity
http://www.motherearthrecycling.net/sim/sim.htm

I will post pictures of my success or

Ooh, a walking tractor. Those are pretty collectible. Did you get any of the
other attachments with it, or just the blower?

GTO(John)

Wayne Mak writes:

I just picked up this free simplicity walk behind and hope to make a
small stump grinder.

I discovered you can braze carbide inserts for teeth onto a steel wheel
with only a propane torch, assuming you can fabricate the wheel. Here's
the secret sauce:

http://www.grainger.com/Grainger/productdetail.jsp?ItemId=1611760405
http://www.grainger.com/Grainger/productdetail.jsp?ItemId=1611760433

[Warning: cadmium, toxic]

I'd study the small units at a tool rental place and try to copy their
designs.

I just picked up this free simplicity walk behind and hope to make a
small stump grinder. I looked at the 2 machines the local rental place offer
and the simplicity looks to be more stout than the smaller grinder.
take a look at the simplicity
http://www.motherearthrecycling.net/sim/sim.htm

I will post pictures of my success or



There are one or two guys making and selling stump grinders for Gravely
walk-behind tractors. Think they have been offered on eBay, or you can check
the Yahoo Gravely Club newsgroup.

One of them uses a brush hog gearbox, I believe the other may have used the
gearbox for a rotary plow.

Apparently, they work well.

John Martin

Be VERY careful with those tall-wheel walk-behinds. The drive wheels are a
low-RPM, high-torque drive. Forward pulling force calculates to torque divided
by wheel radius. That big engine, with high ratio gearing, will put a HUGE
amount of torque on the axle.

Action equals reaction. Counteracting torque is transmitted to the operator's
handlebars. If you are walking behind one of these machines when it hits an
immovable object (stump) those handles are going DOWN. If they snag on your
belt your pants are going down, too. It could be worse -- much worse -- if
your anatomy gets involved. And note that the that you will have to take one
hand off the handlebars to disengage the clutch.

Gravelys, with their squatty drive wheels, apply less torque to the drive axle.
They are not quite as bad.

Suggestion. Buy two sets of snowmobile treads and turn it into a crawler, with
the treads extending well to the rear, and the operator safely on top. You
could still mount a stump grinder at the front.

That looks like a 50s vintage Wisconsin. Low RPM, lots of grunt. If you take
care of it, it will serve your sons and their sons to the fourth generation.

Pat