Cutterblade Removal; Cutterblade Assembly; Cutterblade Sharpening - Hayter Harrier 48 PRO Owner's Handbook Manual

MOWER MAINTENANCE

Cutterblade Removal

To prevent injury it is wise to seek assistance before turning the
mower on its side.
Drain the fuel by running the engine until the fuel tank is empty
and the engine stops. Remove the spark plug lead and allow the
engine to cool. Turn the mower on its right hand side and ensure
that the air cleaner side of the engine is uppermost.
(Refer fi g.35)
Firmly grip the end of the cutterblade with a gloved hand
and remove bolt (1), spring washer (2) and distance piece (3)
securing the cutterblade with a 9/16" A/F spanner.
(Refer fi g. 36)
To prevent accidents never work on the cutterblade unless
the spark plug lead has been removed. The cutterblade has
sharp edges. ALWAYS wear strong work gloves to protect
your hands when working on the cutterblade. DO NOT
rotate tools towards the cutting edges to avoid the risk of
injury should the tool slip. ALWAYS use genuine Hayter
replacement parts.
The condition of the cutterblade and its mounting arrangement
should be checked regularly for signs of wear or damage. Ensure
that the cutterblade is not bent or cracked.
Fig. 36
Fig. 35
2 3
1
A damaged cutterblade that is out of balance will vibrate
excessively and may break. DO NOT use an unbalanced
cutterblade.
Regularly check that the bolt securing the cutterblade is tightened
to the specifi ed torque of 54 Nm.
Replace the cutterblade every 2 years or sooner or excessively
worn or damaged.

Cutterblade Assembly

Assemble the cutterblade with the turned up edges facing
towards the engine. Secure the cutterblade using the bolt (1),
spring washer (2) and distance piece (3).
(Refer fi g. 36)

Cutterblade Sharpening

A slightly worn cutterblade may be re-sharpened. Both blade
edges must be sharpened equally to ensure balance. Sharpen
the cutterblade every 25 mowing hours or more frequently if
conditions require. Remove the cutterblade from the mower and
clean using a brush and water.
Inspect the cutterblade for signs of damage.
Sharpen both cutting edges with a fl at fi le to restore
performance.
(Refer fi g.37)
Fig. 37 Fig. 38
30-45
Ensure that the cutterblade is balanced. Use a screw
driver with a round shaft to support the cutterblade through its
centre hole. Hold the cutterblade horizontal and then release. A
balanced cutterblade will remain horizontal.
(Refer fi g.38)
If the cutterblade is not balanced the heavy end will rotate
downwards. Sharpen the heavy end until the cutterblade is
correctly balanced.
(Refer fi g.39)
Fig. 39
15