Spearhead
Multi-Cut
420
16
Servicing & Maintenance
Regularly
Check there is no wrapping of string, plastic, grass or other debris between
rotor boss and gearbox oil seal.
Inspect gearbox seals for leaks.
Clear grass and other debris from the deck.
Regularly check the rotor boss retaining castle nut for tightness. First remove
the split pin, select the correct size socket in 3/4” drive and fully tighten the
nut. When replacing the split pin, do not slacken the nut to align the hole,
always tighten. Failure to regularly check this nut will result in serious wear to
hub, which is expensive to repair.
It is most important that all gearbox bolts are regularly checked to be very
tight. When the machine is new there will be a ‘bedding in’ period where very
frequent checking is important.
Blades
Caution! When carrying out maintenance work on or near the blades be careful
of free-swinging blades over-centering and falling. It is recommended that
protective clothing including hardhat and goggles are worn.
The blades can be re-sharpened by grinding the cutting edges, care must be taken
that the blades are of the same weight and length after grinding. Do not overheat
when grinding, as this will affect the hardness of the blades. All the blades are free
swinging and swivel on hardened steel bushes, which are replaceable. When
replacing blades, it is important that blades are replaced in sets, in order to retain
balance of the rotor. Bushes must be replaced when new blades are to be fitted.
If the blades are showing any signs of severe wear, damage or cracking, they must
be replaced immediately. Never attempt to weld the blades, as this will make them
very brittle thus extremely dangerous. Do not take risks with the cutting blades - if in
doubt, replace.
L LH Blade
