Best used 18" chipper

Then you would need some valving and hoses. A little down pressure will help with grip when needed and can reduce crotched limbs to fit thru the throat. Also, I believe a double acting cylinder working in a single action roll has negative effect. My old dump truck was set up like that and it eventually burned up the solenoid acting in gravity down mode.
 
Hello @AxeTree. I know your pretty good at fabbin' stuff up and know your way around the shop.
OP say he has dual acting already. I don't understand why anyone would disable that. I assume the lift carriage and arch are there also. Is there a reason for dual acting rams with no lift structure? Or maybe someone replaced the rams with the wrong ones ..... @Gareth's Tree?
 
On a lot of the older Morbark machines, the just have breathers in the top ports on the cylinders. So it is a double acting cylinder but it isn't used as such. And the Morbark won't need the "arch" or anything of that nature because it doesn't have a slide box style top feedwheel yoke. Bandit, Altec, and Woodchuck are about the only machines that utilize that style of feed system.
 
Trevor Balgavy said:
On a lot of the older Morbark machines, the just have breathers in the top ports on the cylinders. So it is a double acting cylinder but it isn't used as such. And the Morbark won't need the "arch" or anything of that nature because it doesn't have a slide box style top feedwheel yoke. Bandit, Altec, and Woodchuck are about the only machines that utilize that style of feed system.
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So... Does that mean that some replumbing and a new valve and I should be able to have hydraulic down pressure? How does the valving achieve float mode? Because a normal hydraulic valve would lock the wheel in a position and not let it go up or down when the valve was in neutral.
 
Gareth's Tree said:
So... Does that mean that some replumbing and a new valve and I should be able to have hydraulic down pressure? How does the valving achieve float mode? Because a normal hydraulic valve would lock the wheel in a position and not let it go up or down when the valve was in neutral.
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Does your yoke valve have one port capped off right at the valve and the valve handle has 3 positions? If so, the float mode will work the same as it does now, you'll just be using both the A and the B ports on that valve and the cylinders. As it is now, you send oil to the bottom side of the cylinder to raise the yoke. When you let go of the valve handle, it lets that pressure back out instead of trapping it in there and leaving the yoke in the raise position. The breathers are in the upper ports of the cylinder just to let the air out of the cylinder when oil goes in the bottom, and let air back in when the oil goes back out. You will essentially be replacing that air with oil. \

Sorry if that is hard to follow, the longer I am out of school, the harder time I have explaining something in writing haha. The valve used for yoke lifts are usually "motor spool" valves, the valve you mentioned above that would lock the wheel in position would have a "cylinder spool" in it. (I know, that sounds backwards in this application.) If it interests you, search "cylinder spool vs. motor spool" there should be some good examples in there somewhere!
 
Trevor Balgavy said:
Does your yoke valve have one port capped off right at the valve and the valve handle has 3 positions? If so, the float mode will work the same as it does now, you'll just be using both the A and the B ports on that valve and the cylinders. As it is now, you send oil to the bottom side of the cylinder to raise the yoke. When you let go of the valve handle, it lets that pressure back out instead of trapping it in there and leaving the yoke in the raise position. The breathers are in the upper ports of the cylinder just to let the air out of the cylinder when oil goes in the bottom, and let air back in when the oil goes back out. You will essentially be replacing that air with oil. \

Sorry if that is hard to follow, the longer I am out of school, the harder time I have explaining something in writing haha. The valve used for yoke lifts are usually "motor spool" valves, the valve you mentioned above that would lock the wheel in position would have a "cylinder spool" in it. (I know, that sounds backwards in this application.) If it interests you, search "cylinder spool vs. motor spool" there should be some good examples in there somewhere!
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Thank you for taking the time to type all that and explain it to me. It does make sense and I understand what you are saying with the difference spool types.
 
I have them all . Even had the piece of shit woodsmen . Never ever buy one . Now have ran the Vermeer , Morbark and brush bandits . That being said . I still own a brush bandit I bought back in 2000 . Still runs and chips awesome. Disc chipper perfect for palm . It's a small 200xP . 18" Morbark is great but it has its issues . They had a run of over hardened blades a few years back and would grenade causing catastrophic failure like the drum blowing out through the pillow blocks . They have fixed the issue since then and warrantied the whole thing so other than down time it all worked out . Tough built wood chipper all around . Number one chipper that I use is the bandit 1990 XP 275 twin turbo diesel Beast . 24" capacity with massive indeed . Feed it with a skidsteer or crane

So have been to all the factories and would have to say that they will all bend over backwards to take care of you ... except woodsmen . That's a whole other post . Buy the chipper that has the best service near you . Then buy a used chipper from them . I buy new but didn't always when I was a small company . I buy New equipment now so I have less down time. Except for old faithful . The little brush bandit 200XP .


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It was woodsmen 18. This would be a phone call conversation because I don't want to post it but trust me . Pieces broke. Service was horrible . Now that being said it was 6 years ago so maybe things are
Different. . One thing . Woodsman makes a bad ass whole tree chipper . The kind you feed with a cat 325 . 600 hp chipper . Stick to Vermeer , brush bandit and Morbark . But don't get Vermeer BC 1800 . The vertical indeed wheels are a pain and you don't get the down crush power you get with Morbark or brush bandit . Their bigger 2300 had down crush if you don't mind 12,000 lb chipper


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96coal449 said:
Some say they grab the butt ends of big wood better but ..... I hate them. Small chunks can get jammed up between the wheel and the wall. This stops feed action. Shut machine down, open access cover, remove springs, wiggle wheels around and get blockage out. Sometimes when feeding brush the butt end keeps hitting the wall of the throat and you then manually turn the branch so it disappears. I've never seen any of that with horizontals.
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I've never had that happen with any Vermeer 17 years going with them
 
Treemachine said:
I've never had that happen with any Vermeer 17 years going with them
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I've seen it happen to every vertical feed wheel Vermeer used on a job. Happens when disposing bigger wood.
Maybe 8-10'' in dia. A chunk will break off or it's the end of the piece being chipped. It ricochets off the knives and ends up in the dead space around the feed wheel. At the same time another branch or chunk enters the feed wheels and they open up trying to occupy the same space the stray chunk has taken up. Instant jam. In 17 yrs you have been extremely lucky to not have to contend to such of an ordeal of un-jamming. My friend has a BC 1500 and it jams here and there. Not a lot but when it does it's a PITA! Sucks even more on crane day.
 
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