Wood chipper

[s219]

I recently got a Walco WC40 for $2000 new, to run on my 26hp Kubota. It's a beast! Heavy flywheel with 4 reversible blades, built like the Wally. I find it runs smoother if I run it at 960pto - 2000rpm. I've loaded full trunks in it, with a bunch of side branches (wild cherry) and it chews it up effortlessly.
But....I learned the hard way that thin, leafy branches will clog the shoot and eventually the whole thing. The trick is to load them in with thin end first, whilst holding on to the thick end to control the feed rate. Otherwise it sucks it all in one gulp and clogs it up.
'nway, I love it. I hope this info helps.

The real trick is to send a larger woody limb through periodically to blow the chute clear of leafy debris. There should be no need to raise RPM -- you're asking for trouble if it stalls/jams at the higher speed.