Echo Bear Cat SC5720B - Manual (Page 21)

17 5 INCH CHIPPER/SHREDDER/BLOWER
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
Figure 5.4, Required chipper blade clearance
(view from top of chipper)
CHIPPER
BLADE
CHOP
BLOCK
1/16" TO 1/8"
CLEARANCE
8. Once clearance has been set, the lock collars must
be replaced and retightened. Using a punch and a
hammer, rotate the lock collars in the direction of shaft
rotation (i.e. counter-clockwise on the rear bearing
and clockwise on the front bearing) and set them with
a positive hammer tap. Tighten the lock collar set
screws.
9. Loosen the set screws holding the belt pulley on the
rotor shaft. Move the pulley on the shaft so it is aligned
with the engine drive pulley. The pulley should be
moved an equal but opposite amount that the rotor
was moved.
10. Insure the pulley drive key is completely seated under
the pulley and tighten the set screws.
11. Check pulley alignment by laying a straight-edge across
the pulley faces. Pulley faces should line up. If not,
determine which pulley to adjust and repeat alignment
check.
12. Replace the belt guard and plastic bearing cap.
NOTE
Never reuse the #10-24 bolts, nuts or shafts. Always install
new parts when replacing knives or blades.
5.7 REPLACING SHREDDER KNIVES
To replace shredder knives or spacers, order Shredder
Knife Kit, 77613-00.
Follow the complete installation instructions, 77614-00.
Figure. 5.5, Examples of damage to knives
5.8 SHREDDER KNIFE 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, Shredder
Knife Kit, 77613-00.)