Echo CH9540H Owners Manual v.2 - Manual (Page 17)

PTO CHIPPERS 13
ENGLISH
SERVICE & MAINTENANCE
Remove the two 3/8" bolts on the rotor access cover. 1.
Tilt access cover open to allow access to rotor. Rotate 2.
the rotor so that the bolts holding the blades are best
accessible.
lock the rotor in place by pushing a punch through
3.
the bracket mounted on top of the rotor shaft and then
through a hole in the shaft itself (see below).
Remove the two nuts and cap screws holding the blade 4.
itself. Repeat for all blades. The blades have two edges
per blade and can be reversed one time each before
sharpening.
5.1 CHIPPER bLAdE mAINTENANCE
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 (see below). 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.
The chipper blades will eventually become dull, making
chipping difficult 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,
especially 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).
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
5.2 REmovING THE bLAdES
5.3 SHARPENING THE bLAdES
chipping blades are sharp! use caution when working
on machine to avoid injury.
WARNING
45˚
SHARPENED
SURFACE
MOUNTING SURFACE
(DO NOT GRIND)
.38
SHARPENED
SURFACE
MOUNTING SURFACE
(DO NOT GRIND)
Arrow shows how punch goes through rotor shaft