Echo Bear Cat SC2170 - Manual (Page 15)

2 INCH CHIPPER/SHREDDER
11
ENGLISH
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
5.6 REMOVING THE SHREDDING KNIVES
Figure 5.3, Removing the chipper blades
CHIPPER BLADE REMOVAL
1. Remove the six 5/16” spiral lock nuts securing the front
panel to the housing.
2. Remove the two 5/16-18 x 5/8” bolts and securing the
blade to the rotor. Note the relation of blade cutting
edge to rotor.
3. Inspect blade to see if cracks or nicks are visible. If
cracks are present, the blade cannot be re-sharpened
and must be discarded. (For service, order small blade
replacement kit #70738.)
4. If both sides of the blade have not been used yet, the
blade can be rotated so the new edge is in position
and re-used.
5. If both sides of the blade have been used, it must be
re-sharpened. The blades can be ground on a bench
grinder or by a professional.
6. Replace blade on the rotor. Note correct orientation of
cutting edge to rotor.
7. Apply thread locking adhesive to bolts and torque to
25 ft-lbs.
8. Repeat steps 2-7 for second blade.
9. Replace front cover and six 5/16 nuts. Test machine.
NOTE
Never reuse the #10-24 bolts, nuts or shafts. Always install
new parts when replacing knives or blades.
To replace damaged shredder knives or spacers, order
Shredder Knife Kit, 77616-00.
1. Remove the six 5/16” spiral lock nuts securing the front
panel to the housing.
2. Working one shaft at a time, remove the #10-24 screw
and nut securing the spacer.
3. Note the knife and spacer configuration as it must
be duplicated when assembling the new knives and
spacers.
Figure. 5.4, Examples of damage to knives
Figure. 5.5, Shaft assembly hole location
5.5 SHREDDER KNIVES MAINTENANCE
Do not attempt to sharpen shredder knives. Inspect the
knives often for signs of damage.
If a knife has any sign of cracking or is broken in any way,
it should be replaced immediately. (For service order,
Shredder Knife Kit, 77616-00.)