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5.5.3 Blade Sharpening & Straightening
McConnel 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: McConnel declines all responsibility for damage and/or injury caused by sharpening/straightening and/or
modifying ANY of the standard or ‘Starcut’ blades on any SR460/620/820 machines. If you are unsure of the
condition of your blades, and feel you need additional assistance, please contact your local McConnel
dealer, qualified service centre or McConnel.
5.5.4 Blade Removal & Replacement
Equipment Required
Torque wrench (see required settings in Torque Settings section)
36mm hex sockets/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 5.5.2.
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 or bushes are requiring
replacement or not.
Standard SR460/620/820 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.
When assembling standard blade assemblies, a flat washer
(see Figure 5.49 (H)) is required to be placed under the head
of the bolt (F). Flat washers are not required on Starcut blade
assemblies.
Figure 5.49 shows the left-hand and right-hand blades definitions and the direction in which they’re meant to cut.
Starcut blades can be replaced in a similar fashion; however they are not handed.
Figure 5.48 – Blade Carrier
Assembly (with Starcut plates)
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