Echo 76824 Owners Manual v.3 - Manual (Page 19)

15 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
Chipping blades are sharp! Use caution when working on
machine to avoid injury.
Warning
The chipper blades will eventually become dull, making chipping
difficult and adding extra strain on the machine. Poor chipping
performance is usually a result of dull chipping blades. It is rec-
ommended that the blades be sharpened every 5 - 15 hours or
if your chipper’s performance has decreased. Check for the fol-
lowing symptoms and sharpen the blades if needed.
Severe vibration when feeding material 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"
(Figure 5.2).
The base of the cutting edge is worn or has been re-sharp-
ened so that the edge extends less than 1/16" above the
disk chipping slot.
1.
2.
3.
1.
2.
5.3.1 removing The blades
Remove the two 3/8 inch retaining bolts securing the access
cover to the main frame assembly.
Tilt access cover over to allow access to disk. Rotate the disk
so that the bolts holding the chipper blades are accessible.
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.
Remove the security lock nuts (on back side of chipper disk)
and the flat head screws holding the blades to the disk.
1.
2.
3.
4.
Figure 5.2 - Causes for Replacement
1/8"
1/4"
5.3 chiPPer blades 5.2 disK locK
Follow the steps below to install the disk lock:
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.
Rotate the disk assembly until the hole on the disk jack shaft
lines up with the holes in the disk shaft cap and bracket.
Install a punch or screwdriver into the disk shaft cap, bracket
and shaft.
Remove punch or screwdriver when service and/or mainte-
nance is completed.
1.
2.
3.
4.
Figure 5.1 - Disk Lock
The disk assembly has a lock mechanism. When working on
the disk assembly, use the lock mechanism at all times.
Warning