Good morning guys, today we are going to
be going through the process to change
chipper knives in this Vermeer BC 1000
brush chipper. Here are the tools we are
going to need to do this job. You need a
torque wrench, a breaker bar, a set of
sockets, safety glasses and leather work
gloves. So to get started swapping out
our chipper knives we're gonna have to
open this top hatch to access the drum
and the knives so what you're going to
need is a 5/8 socket and a ratchet to
pop that top cover open. So now before we
do any knife maintenance, it is a good
idea to look at the drum and the knives.
So we can just slowly rotate the drum
and we'll do a quick inspection as we do
so to make sure there are no cracks in
the drum the welds are good and there's
no debris caught anywhere that would
inhibit the drum from turning when we go
to turn it on.  Now, before we take these
knives out, we are going to have to lock
this drum. How we do that, there's a little lock mechanism right here in the corner so
we're gonna pop that down and there's a
little slot right here in the drum where
we could actually lock this drum right out. So we're just 
going to push this drum a little
further back and you can see our lock is
in place now and this drum can't go
anywhere. Now that we have access to our
cutter knives our drum is locked, now we
can go ahead and grab our breaker bar
and our 15/16 socket with extension and
we can break these bolts loose.
Now that we have those loosened off, we
can go ahead and grab our ratchet with
our 15/16 socket again and just pop
those bolts right out. Now that we have
our four bolts holding our knife out we
can go in now and pull out our old knife
and give it a good inspection. So now
that we have that knife out, now we just
have to do the second knife. So what we
are going to do is unlock the cutter
drum, rotate it half a turn,
lock the drum in place, so now that drums
not going anywhere but now we can remove
our second knife. So now we can do a
side-by-side comparison of the knives
now that we have the old ones out and we
can see that we have damage on both
edges, so these knives have already been
rotated in the drum once, which means
that we are going to have to replace the
bolts now that they have been used for
one knife cycle. And here are the new
blades we are putting in and here are
the eight brand new bolts that'll be
going in with our new knives. Alright
so now we are ready to install our new
knife so it's gonna rotate the drum and
lock it into place. It's not going to be
moving anywhere and now we can install
our new knife. Now if we are installing a
knife that's been resharpened a few times
what you're going to want to do is
measure the knife to make sure that we
have enough blade so that it's usable. So
the way to do that is we are going to
measure
from the center of the knife outwards
and from the center to the edge of the
blade must measure minimum of two inches.
If it doesn't meet that measurement,
blades are no good I'm off to get new
ones.
We're gonna go ahead and install these
new knives making sure to wear your
leather gloves when handling these
because they are very sharp. We're going
to install our brand new bolts prior to
installing the new bolts we can
lubricate them with a light oil. These
will just be threaded in hand tight and
then from there, we will torque them down. Alright
so we got our torque wrench already with
our fifteen sixteenths socket and
extension we are going to torque down
our knife and according to the
instructions we are torquing bolts down
to 210 foot-pounds beginning with the
center bolts.
Four. Alright, so now we have those
torque down unlock the drum and rotate it's time to install that second
knife. So now we've changed out both
knives torque to the bolt down to 210
foot-pounds what we'll do now is close
the hatch, reinstall the top mounting
bolts
now we're going to take our ratchet with
our 5/8 socket and tighten each bolt
down.  And that's it that's the process to
change chipper knives on the premier BC
1000
