Echo CH8993H Owners Manual v.7 - Manual (Page 22)

18 8 INCH TURNTABLE CHIPPER
SERVICE & MAINTENANCE
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE,
DISENGAGE THE HYDRAULICS, OPEN SHIELD AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
WARNING
1. Remove the two 3/8" retaining bolts securing the
access cover to the main frame assembly.
2. Tilt access cover over to allow access to disk. Rotate
the disk so that the bolts holding the chipper blades
are accessible.
3. Install the disk lock (Section 5.2). The disk is now
restrained for removing the blades. To access the
remaining blades, remove the punch or screwdriver
and reposition disk. Return the punch or screwdriver
to the disk lock hole.
4. Remove the two bolts that hold the blade to the disk.
The hardware can be reused. Repeat for the remaining
blade.
5. The blades have two edges and can be reversed one
time before sharpening.
5.2 DISK LOCK
Follow the steps below to install the disk lock:
1. There is a hole in the shaft cap, the disk jack shaft and
a matching hole in the bracket mounted to the disk
bearing front side.
2. Rotate the disk assembly until the hole on the disk
jack shaft lines up with the holes in the disk shaft cap
and bracket.
3. Install a punch or screwdriver into the disk shaft cap,
bracket and shaft.
4. Remove punch or screwdriver when service and/or
maintenance is completed.
DISK ASSEMBLY
DISK LOCK HOLE
SHAFT CAP
MATCHING HOLE
ON DISK JACK SHAFT
Figure 5.1, Disk Lock
The disk assembly has a lock mechanism. When work-
ing on the disk assembly, use the lock mechanism at
all times.
WARNING
Chipping blades are sharp! Use caution when working
on machine to avoid injury.
WARNING
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
• 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
5.4 REMOVING THE BLADES