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MOWER MAINTENANCE
Cutterblade Removal
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.
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 if
excessively worn or damaged.
Fig. 32
Fig. 33
3
2
1
4
Cutterblade Assembly
Assemble the cutterblade (4) with the turned up edges
facing towards the engine. Secure the cutterblade (4)
using the bolt (1), spring washer (2) and distance piece
(3).
(Refer fi g. 32)
The blade will curve slightly when tightened against the
friction disc.
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.33)
Ensure that the cutterblade is balanced. Use a screwdriver
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.
Fig. 34
35°
(Refer fi g.34)
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.35)
Fig. 35
20
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