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Figure 5.51 – Beware of Falling Blades
Equipment Required
Torque wrench (see required settings in Torque Settings section)
36mm hex sockets/spanner
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.
IMPORTANT: Operating with loose blade components will damage the blade carrier and blades. Whenever the
blades and blade carrier have been removed or replaced, the tightness of components should be checked
after the first hour and then every 8 hours thereafter.
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 preventative measure and to reduce blade and blade carrier 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 do 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 blade carriers are made of special heat-
treated alloy steel. Substitute blade carriers 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 can be found in Figure 1.7.
5.5.7 Anti-scalp Dish, Blade & Blade Carrier Removal & Replacement
IMPORTANT: Throughout this section be aware of the blade carrier rotating. Before proceeding to carry out any
of the operations stated in this section; see Section 5.5.2 with regards to handling blade carrier assemblies
safely.
Throughout this section, the process is shown on a SR460 left-hand wing assembly. This same process is
applicable to all blade carrier assemblies on SR460/620/820 machines. (Visual guidance references may vary).
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