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blades towards the outside and gradually rotate and pre-place them into their dropped position; as shown in
Figure 5.47. This will ensure that personnel do not get hit by falling blades or pinched/trapped between the blade
and the carrier.
Figure 5.47 – Beware of Falling Blades
Carefully wiggle the blade carrier assemblies and check each of the rotors for looseness of fasteners. Retighten
any loose parts to the correct torque figure. See Section 5.9 for torque settings. Blade carrier fasteners should
be checked after the first hour and then every 8 hours thereafter.
Equipment Required
Torque wrench (see required settings in Torque Settings section)
2 x 36mm hex sockets/spanner
IMPORTANT: Operating with loose blade components will damage the blade carrier and blades. Whenever the
blades have been removed or replaced, the tightness of components should be checked after the first hour and
then every 8 hours thereafter.
When proceeding to inspect the blades, if any 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 and
dangerous. Do not take risks with cutting blades – if in doubt replace.
WARNING! Inspect the area before mowing. Foreign objects should be removed from the site prior to
beginning work to prevent machine damage and/or operator, bystander or the environment. Any objects
that cannot be removed must be clearly marked and carefully avoided by the operator.
WARNING! Pay special attention when working with the machine and do not allow the machine to touch
fixed objects such as road drains, walls, shafts, curbs, guard rails, tracks etc. as these could break the
blades or blade carrier which could cause debris to be thrown at very high speed from the machine. As
a precaution raise the cutting height of the machine to 150mm (6 inches) to ensure they do not collide
when the machine is in work.
As a preventative measure and to reduce blade wear and potential detrimental damage, inspect the
destined working area of the machine to determine where foreign object hazards are. Remove these
hazards and if they aren’t easily removable, place visual markers where items are to ensure that the tractor and
machine does not come into contact with these hazards.
IMPORTANT: Always use genuine McConnel parts when carrying out repairs and maintenance with thoughts to
longevity and reliability of the machine and personnel safety. McConnel blades are made of special heat-treated
alloy steel. Substitute blades may not meet specifications and may fail in a hazardous manner that could cause
injury.
McConnel 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 McConnel parts dealer on SR460/620/820 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 1.7.
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