Echo 76624 Owners Manual v.4 - Manual (Page 21)

17 6 INCH CHIPPER
ENGLISH
SERVICE & MAINTENANCE
BEFORE INSPECTINg OR SERVICINg ANy PART OF THIS MACHINE, SHuT OFF POWER SOuRCE,
DISENgAgE THE HyDRAulICS, AND MAKE SuRE All MOVINg PARTS HAVE COME TO A COMPlETE STOP.
WaRNING
45˚
SHARPENED
SURFACE
MOUNTING SURFACE
(DO NOT GRIND)
.38
SHARPENED
SURFACE
MOUNTING SURFACE
(DO NOT GRIND)
Chipper blade sharpening
5.5 REpLaCING THE DRIvE bELT
Remove idler pulley by loosening the 1/2” mounting 1.
hardware (see picture below).
lift belt idler pulley off the idler arm weldment.
2.
Remove the drive belt from the pulleys and discard. 3.
Install new belt on pulleys and lower belt idler. 4.
Reinstall the belt idler pulley into the idler arm 5.
weldment using the 1/2” hardware. Tighten bolt to
proper torque.
Check belt tension before start-up. If necessary, adjust
6.
spring tension.
The alignment of the pulleys should be checked if
the belts are showing unusual wear. to check the
alignment, run a straight edge along the engine
and rotor pulleys. Adjust the lower (engine) pulley if
necessary to bring them into alignment.
NoTE
Unscrew the bolt to remove the idler pulley
5.4 SHaRpENING THE 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 (see figure below). 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.
7. For blades that have been repeatedly sharpened,
ensure that the sharpened surface extends past the
chipping slot opening. If it does not extend past the
opening, the blades should be replaced.
Check the condition of the drive belt annually or after every
25 hours of operation, whichever comes first. If the belt
is cracked, worn, frayed, or stretched, replace it. Replace
belt with original banded belt type only. Do not use single
type belts.
to replace the belt: