EVO205D SAFE / SURE-Trak 6. MAINTENANCE
6-4
©GreenMech
Ltd
6-4
03/22
6.7 Disc Blade Cleaning - Replacement
Blade design permits relocation in at least two rotated positions before regrinding or replacement is required.
1 Check engine is switched off, and start key removed.
2 Raise engine cover, and check any rotation has stopped.
CAUTIONS for Blade cleaning
•
Blades have sharp edges. Wear protective gloves.
•
Flywheel paddles and vanes create shearing and trapping points at
edges of exposed housing. Do not place hands or fingers on or
near flywheel and housing edges.
•
Flywheel rotation is resisted by engine compression in either
direction. Beware unexpected movement when manually rotating
flywheel between blade positions.
•
Tools can slip if not fully engaged. Clean fasteners thoroughly
before applying tools.
•
Ensure flywheel is prevented from rotating when applying force to
tools on blade fasteners.
Follow procedure as on symbol instructions on machine (Section 3.8):
1) Wear protective gloves.
2) Remove flywheel cover bolts.
3) Using discharge chute handle as a lever, swing back cover on to stop to expose flywheel and blades. (fig 6.7.1).
4) Locate and retract flywheel locking pin, and carefully turn flywheel until locking pin engages hole (2 positions) in
flywheel to prevent movement).
5) Thoroughly clean debris from nut faces and bolt head socket.
6) Using socket tool, loosen nut anticlockwise. Support blade bolt with hexagon key as required and remove blade
and fasteners (fig 6.7.2).
7) Thoroughly clean debris from flywheel blade housing and all components to be replaced.
Inspect condition of
nuts and bolts and replace if any signs of wear. (Fig 6.7.3
and fig 6.7.4)
8) Replace blade with Nord-Lock washers ensuring that
flywheel is blocked for opposite rotation. Tighten to
correct torque: 200Nm.
Retract locking pin and carefully rotate to next blade and
repeat next blade removal (from 4 above) until all blades
cleaned and replaced securely.
9) Replace all covers.
10) Check all covers are secure.
11) Replace key to start machine.
CAUTION! Blades must only be sharpened by
grinding angled back face on a bench grinder. Grinding of
front face will upset gap, which is factory set. Do not
sharpen with hand held equipment
.
All blades must be sharpened in “sets” with equal amounts
removed to maintain balance. See 6.24
Note. If any blades are worn below flat annular section a complete set should be replaced.
Fig 6.7.3 Blade fastening assembly
Washer pair
Fig 6.7.4 Nord-Lock washer pair
Note fewer teeth facing each other
Fig 6.7.2. Flywheel and blades
Fig 6.7.1 Chipper flywheel cover
Locking Pin
Cover locating
bolts (removed)
Grease nipple
