Echo Bear Cat SC2206 - Manual (Page 15)

2.75 INCH CHIPPER/SHREDDER 11
ENGLI
sH
SERVICE & MAINTENANCE
bEForE insPECting or sErviCing any Part oF tHis MaCHinE, sHut oFF PoWEr sourCE,
anD MaKE surE all Moving Parts HavE CoME to a CoMPlEtE stoP.
WARNING
remove the eight 1.
5/16" nuts holding
the engine and
plate to the frame
(see Fig. 5.1) and
remove the engine
and plate from
frame.
to remove a blade,
2.
remove the two 5/8"
bolts securing the
blade to the rotor.
note the relation of
blade cutting edge
to rotor.
5.3 REmovING THE cHIppER bLAdEs
Fig. 5.2 - Double-Edged Blade
5.4 sHARpENING THE bLAdEs
45°
.25
MOUNTING SURFACE
(DO NOT GRIND)
MOUNTING SURFACE
(DO NOT GRIND)
SHARPENED
SURFACE
SHARPENED
SURFACE
Fig. 5.1 Remove these bolts and four
on other side
inspect blade to see if cracks or nicks are visible. if 3.
cracks are present, the blade cannot be resharpened
and must be discarded (see sec. 5.2).
if the other side of the blade has not been used yet,
4.
the blade can be rotated so that the new edge is in
position and reused.
if both sides of the blade have been used, it must be
5.
resharpened. the blades can be ground on a bench
grinder (see sec 5.4) or by a professional.
replace blade on the rotor. note correct orientation
6.
of cutting edge to rotor (see sec. 7.1).
secure with two 5/16" x 1/2" bolts and torque to 25 ft-lb.
7.
repeat steps 2-7 for the second blade. 8.
NICK GREATER
THAN 1/8”
CRACK
GREATER
THAN 1/8”
BROKEN
CORNER
before you sharpen the chipping blades, check for
permanent damage. replace the blade if:
•
there are cracks, broken corners or nicks greater than
1/8" (see below).
CHIPPING
SLOT
NEW
BLADE
CHIPPER
DISC
BLADE IS
TOO SHORT,
MUST BE
REPLACED
CHIPPER
DISC
CHIPPING
SLOT
the blades can be ground on a bench grinder or by a
professional.
1. never sharpen or grind the mounting surfaces of the
blades. this will cause the edge to roll and the blade will
be damaged, resulting in poor chipping performance.
2. regrind the angled edge of the chipping blades to 45
degrees (Figure 5.2). Make sure some type of fixture is
used to correctly hold the blade at the proper angle.
3. be careful when grinding so that the blade does not
become overheated and change color. this will remove
the heat-treated properties.
4. use short grinding times and cool with water or some
type of liquid coolant.
5. remove an equal amount off each blade to maintain
rotor balance.
6. small imperfections such as nicks and burrs on the flat
side of the blade will not affect the chipping performance
of the machine.
7. For blades that have been repeatedly sharpened,
ensure that the sharpened surface extends past the
chipping slot opening. if it does not extend past the
opening, the blades should be replaced.
• The base of the cutting edge is worn or has been re-
sharpened so that it no longer extends past the chipping
slot (see below).