I have 31hp at the pto. So, woodland Mills supports a 6 inch
chipper. Woodmax 6, 8, or 9. 95 pct of chipping is fresh cut cedar. I like the woodmax 8800 but for some reason it has 2 blades. Bothe the woodmax 6 inch and 9 inch have 4 blades. Any thoughts on these 2 brands. Any experience or thoughts on 2 blades vs. 4?
I have a
woodmaxx 8H on a Kubota
L35 with 31 hp at the PTO. I've had it for five years and it's been a workhorse. The
chipper is overdriven by a belt drive so the flywheel turns faster than the PTO. I think the belt drive absorbs a lot of the intense vibration that can be produced by the
chipper - it's a lot kinder to the tractor and PTO system. The hydraulic feed system is self contained and driven by a belt off the pto. I've had zero mechanical problems. You'll definitely want the hydraulic feed. If you're chipping something big then you'll need to "beep" the wood into the
chipper and let it recover each time before feeding a little wood more into the knives. The flywheel is very heavy and it takes a few seconds for the
chipper to get back to speed if it bogs down. 31hp is plenty to operate the
chipper but if you chip anything bigger than 4 inch then you'll need to pay attention to
chipper rpm. I mostly chip softwoods like douglas fir and pines both green and dry.
You have to pay attention to the flow of chips out the chute, if it starts to clog the chip flow will slow and land closer to the
chipper. Clogging is especially likely if you're chipping lots of small branches because they can turn sideways in the feed chute and the
chipper cuts off long pieces. You'll have to remove the chute and clean out the
chipper exit once in a while. You DON'T WANT to clog the
chipper. It's a tough job to remove all the access plates and pry all the compressed chips out of the
chipper. The safety bar occasionally falls down to the neutral position due to strong
chipper vibration and it stops feeding.
I bought a spare set of flywheel knives and bed knife so I just replace the parts when it's time. A local machine shop grinds the knives on a knife grinder. Access inside the
chipper is pretty tight but not impossible. You'll need a helper on the outside when replacing knives. It's a bit of a hassle to get the bed knife set in the right place so the gap is correct with the knives in the flywheel. I've replaced the hydraulic filter on the feed system once but the filter I removed was clean. I have adjusted drive belt and hydraulic feed pump belt tension a couple of times, it takes some time but it's not difficult