Echo CH5540H Owners Manual v.3 - Manual (Page 16)

12 5 INCH CHIpper
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
Chipping blades are sharp! Use caution when working on
machine to avoid injury.
To remove the chipping blades for sharpening:
1. Remove the one 3/8" retaining bolt holding the access
cover to main frame assembly (see Fig. 5.1).
2. Tilt access cover over to allow rotor access. Rotate
the rotor so that the bolts holding a chipping blade are
most accessible.
3. Remove the two hex bolts holding the chipper blade.
4. Repeat for all four chipper blades.
5. Replace sharpened or new blades and torque to 25
ft-lbs.
warninG
5.4 remoVinG chipper BlaDes
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.
5.5 sharpeninG chipper BlaDes
ACCESS
BOLT
Figure 5.1 Access bolt
5.3 chipper BlaDe mainTenance
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.
The controller light will flash an amber code every 15 hours
as a reminder to check the chipper blades. To reset the
controller, see Sec. 6.
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
Chipping blades are sharp! Use caution when working
on machine to avoid injury.
CHIPPING
SLOT
NEW
BLADE
CHIPPER
DISC
BLADE IS
TOO SHORT,
MUST BE
REPLACED
CHIPPER
DISC
CHIPPING
SLOT
• 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).