8999151EN: v1 11/03/2021
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Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
treated alloy steel. Substitute blades may not meet specifications and may fail in a hazardous manner that could
cause injury.
Spearhead declines all responsibility for damage and/or injury caused by use of anything other than the blade
carriers/blades which are supplied with the machine as new or sold as a spare part replacement sold by a
genuine Spearhead parts dealer on Multicut rotary machines.
See Section 7 for guidance on spare parts. The machine serial number will be required to be quoted. Serial plate
location guidance can be found in Figure 1.4.
5.4.3 Blade Sharpening & Straightening
Spearhead does not recommend sharpening worn blades. It is important that all the blades on a rotor, are
of the same weight and length and are all present to ensure the rotor remains balanced. By sharpening
blades there is a chance of them overheating, which will affect the hardness of the blades; compromising safety
to the operator, machine and bystanders.
DANGER! Never attempt to straighten or weld on blades. This is likely to cause potential cracks and
other damage to the blade. Subsequent failure and possible serious injury will occur from thrown blades.
NOTE: Spearhead declines all responsibility for damage and/or injury caused by sharpening/straightening
and/or modifying blades on any Multicut machines. If you are unsure of the condition of your blades, and feel
you need additional assistance, please contact your local Spearhead dealer, qualified service centre or
Spearhead.
5.4.4 Blade Removal & Replacement
Equipment Required
• Torque wrench (see required settings in Torque Settings section)
• 36mm hex sockets/spanner
• 36mm hex spanner
WARNING! It is mandatory to switch the combustion engine off and disengage PTO and ensure that
the tractor and machine is stopped, the ignition key is removed from the dashboard and the parking
brake is engaged before leaving the driver’s seat and proceeding to adjust the levelling of the machine.
Before proceeding to remove and replace the blades of the machine, correctly assess the condition of the blades
by reading the guidance given in Section 5.4.2.
If blade replacement is required, in order to not need to remove
the lower blade carrier of the rotor, remove and replace each of
the blades of the machine one at a time. When replacing rotor
assemblies with new blades, due to their free swinging ability, it
is important to fit new hardened bushes into the blades at
the same time. This can ensure the rotor is remained
balanced. Blade bolts and nuts should be replaced
whenever blades and bushes are removed; whether the
blades are requiring replacement or not.
Multicut blades are handed. It is important to make a note of
the direction of the particular rotor in question and to ensure
that the correct blade is fitted to the rotor and correctly
orientated. For guidance on the rotation directions of each of
the rotors, see Section 1.4.
Figure 5.20 – Multicut Blade
Carrier Assembly
(standard shown)
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