Maintenance; Engine; Check Engine Oil Level; Clean The Air Filter - LawnMaster 460 Owner's Manual

Engine

Refer to the manufacturer's operator owner manual for
engine maintenance information.
Rotary mower (running) engines
can seize without sufficient oil

Check engine oil level

Periodically the oil level should be checked to ensure
it is correct. Engine oil also requires changing after
the initial first five hours of use, and then every 50
hours of normal use and 25 hours of heavy use
thereafter. With the mower in a level position,
1. Remove the oil dipstick.
2. Wipe the dipstick clean replace and remove.
3. If the engine oil level is below the minimum
mark on the dipstick, top up with the correct
grade of engine oil to the full mark on the
dipstick. DO NOT OVER FILL. Then screw the
dipstick securely back into place.
Note that if the engine is overfilled, it will smoke
excessively or appear to be seized.

Clean the air filter

Remove and clean the air filter cartridge at three
monthly intervals or every 25 hours of normal
use. The air filter cartridge may require servicing
more often under dusty operating conditions. To
service the air filter cartridge, follow the procedures
detailed in the engine manual.

Check spark plug

Clean and reset the spark plug gap every 25 hours
of operation. Remember, in small engines, difficult
starting and
erratic
running is
most often
attributable
to a dirty, oily or carbonated spark plug. Do not file
or sand blast the spark plug electrode but clean

Maintenance

by scraping or wire brushing, then cleaning with a
commercial solvent. Clean and reset the spark plug gap
at 0.7 - 0.8mm (0.030") every 100 hours of operation.
Always fit the recommended spark plug.

Rotating screen

Through prolonged operation, the rotating screen
may become clogged with grass and debris. Clean
the screen in line with the engine manufacturer's
recommendations to avoid over heating and possible
engine damage.
Throttle control & Self Propelled
control
Lubricate the cable every 25 hours of mowing by
applying a light oil to the top of the inner wire and
allowing it to gravity drain down the inside. The
throttle control lever quadrant should have medium
grease smeared over it to protect it from corrosion and
to give a smooth operation.

Fasteners and linkages

Check that all nuts, bolts, pins and linkages are
secured correctly in place and are in good condition.

Blade care

Check the condition of the blades, bolts and cutter
assembly regularly. Remember that badly worn blades
will affect grass cutting, catcher fill and cause excessive
mower vibration.

Change worn or damaged blades

To maintain balance, always fit a complete set of
blades and fasteners. To replace the blades, proceed as
follows:
1 Set the lawnmower to highest cutting height.
2 Lift the rear flap and prop open to allow access to
the blade area.
3 Remove each blade, blade retaining bolt, nut,
washer and discard.
4 Fit the new blades, blade bolts, washer and nuts.
5 Torque the blade nuts (20 Nm) and check each
blade is free to move after tightening.
6 Remove the prop from the rear flap and replace
the spark plug cable.
It is recommended that you use an authorised Service
Agent for any replacement, sharpening or balancing
blade work.
8
Always disconnect the spark plug
lead when working on the disc
blade assembly. This will prevent
accidental engine start.