Lubrication; Cutterblade Removal; Cutterblade Assembly; Cutterblade Sharpening - Hayter Harrier 41 Owner's Handbook Manual

MOWER MAINTENANCE

Lubrication

Lubricate the wheels, pivot points and linkages with engine oil
every 25 operating hours.
Apply a good quality medium grease to the inner control cables
at the point of entry and exit from their outer casing.

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. When tipping the machine, ensure that the spark
plug is kept uppermost.
Firmly grip the end of the cutterblade (4) 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. 30)
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
Fig. 30 Fig. 31
3
2
1
4
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.

Cutterblade Assembly

Assemble the cutterblade 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. 30)

Cutterblade Sharpening

A slightly worn cutterblade may be re-sharpened. Both blade
edges must be sharpened equally to ensure balance.
Fig. 32
30-45
Fig. 33
15
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.31)
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.32)
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.33

Blade Brake Test

With the engine stop OPC lever away from the handlebar in the
stop position; gently try to pull the engine start cord. The cord
should be diffi cult to pull. If it is too easy to pull, the engine
brake is not working correctly. Do not use the mower, have it
repaired by your Hayter dealer.