Echo CH123DH Owners Manual v.2 - Manual (Page 19)

12 INCH CHIPPER 15
ENGLISH
SERVICE & MAINTENANCE
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE, REMOVE KEY,
DISCONNECT THE BATTERY CABLES AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
WARNING
Raise the knife access cover using the jack (Section 1.
4.8) and secure with the lock pin.
Rotate the disk until a chipper blade is accessible. 2.
Secure the disk to prevent movement while removing 3.
the chipping blades.
Remove the three 5/8" x 3" bolts and nuts holding the 4.
chipper blade to the disk and remove the blade; repeat
for remaining blades.
Inspect blades to see if cracks or nicks are visible. If 5.
cracks are present, replace the blades. If nicks can not
be removed by sharpening blade, replace the blade.
Both ends of the blade can be sharpened
5.2 CHIPPER BLADE MAINTENANCE 5.3 REMOVING THE BLADES
5.4 SHARPENING THE BLADES
The chipper blades will eventually become dull, making
chipping diffi cult and adding extra strain on the machine.
CHECK THE SHARPNESS OF THE BLADES EVERY
5 - 15 HOURS OF OPERATION AND SHARPEN AS
NEEDED.
Your blades need to be sharpened if:
• Machine vibrates severely when material is fed into the
chipper.
• Small diameter branches do not self-feed.
• Chips discharge unevenly or have stringy tails, espe-
cially when chipping green branches.
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). The blades can be ground on a bench grinder or by a
professional.
Never sharpen or grind the mounting surfaces of the 1.
blades. This will cause the edge to roll and the blade will
be damaged, resulting in poor chipping performance.
Regrind the angled edge of the chipping blades to 45 2.
degrees. Make sure some type of fixture is used to
correctly hold the blade at the proper angle.
Be careful when grinding so that the blade does not 3.
become overheated and change color. This will remove
the heat-treated properties.
Use short grinding times and cool with water or some 4.
type of liquid coolant.
Remove an equal amount off each blade to maintain 5.
rotor balance.
Small imperfections such as nicks and burrs on the 6.
flat side of the blade will not affect the chipping per-
formance of the machine.
For blades that have been repeatedly sharpened, 7.
ensure that the sharpened surface extends past the
chipping slot opening. If it does not extend past the
opening, the blades should be replaced.
NICK GREATER
THAN 1/8” CRACK
GREATER
THAN 1/8”
BROKEN
CORNER
• 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).
NEW
BLADE
CHIPPER
DISC
CHIPPING
SLOT
CHIPPER
DISC
BLADE IS
TOO SHORT,
MUST BE
REPLACED
CHIPPING
SLOT
WARNING
Chipping blades are sharp! Use caution when working
on machine to avoid injury.
MOUNTING SURFACE
(DO NOT GRIND)
MOUNTING SURFACE
(DO NOT GRIND)
SHARPENED
SURFACE
SHARPENED
SURFACE
45°
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