Hi Mike,
I'm located in Central Vermont and I have a Valby
chipper with the hydraulic feed unit you are talking about. I'll look through my manuals and see if I still have one for this.
I didn't run my
chipper last year, just did burn piles, which I usually do unless I need chips. Chipping simply takes time. But I wouldn't use a
chipper without a hydraulic feed, safety is obvious, but there are other benefits:
1) Being able to control the feed rate allows me to create different sized chips. When the wife wants small chips for garden mulch I run the feed very slowly. When I'm trying to create large chips for trail surfaces I run it faster.
2) Being able to quickly back out a load, that might clog the
chipper and in the worst case burn the belts, is very helpful. Replacing the belts on these Valby chippers is probably my least favorite maintenance job. I'll do anything to avoid it. I keep the feed rate reasonable and then my hand is right there on the top bar of the hydraulic feed ready to reverse it.
3) The throat of the hydraulic feed does a reasonable job of breaking up side branches that might clog the main unit if they got inside.
Since I hate changing the belts, I would rather run my
chipper churning up 4" branches all day long than try 6"ers. How big is your
chipper? I assume it is properly sized for this hydraulic feed.
Regarding the used hydraulic feed unit you are looking at, be ready to change the hoses if it's been left outside for a long time. What is your rear hydraulic setup like on your tractor. Ideally you will want power beyond to get unrestricted flow back to the
chipper vs. a rear remote setup.
- Mike