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maintenance & Housekeeping
Locking guard nut
Aggregate Industries > Back Lane Quarry, Lancashire > 01524 733512
www.safequarry.com
At Aggregate Industries’ Back Lane Quarry, each guard is now subject to improved security through the use
of a sheathed locking nut which requires a specific tool to remove it. With the correct tool, removal is quick
and easy. The nut does not necessarily need to be tightened completely, as a retaining nut on the sheath
prevents rotation. A protective gromet prevents the ingress of dust. The guard nut tools can be subject
to controlled issue, hence allowing management to exercise greater control. The locking guard nuts cost
around £1 each and the specialist tool £30-£40. The system is eminently transferable.
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Vehicles: wheel-locking nuts
Foster Yeoman > Glensanda Quarry, Oban > 01631 730441
Wheel nuts coming off Land Rovers posed a serious safety concern at
Glensanda Quarry in north-west Scotland. Due to the nature
of the location, some vehicles have to travel over rough terrain
and so have been fitted with extra large tyres. The mild pressed
steel wheel rims rubbed against the stainless steel nut, causing
the latter to work loose very quickly.
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After trials with several other solutions, a specially designed wheel-locking nut has been settled upon.
Only trained fitters have the key to fit and tighten the nuts. For maximum performance, a rigorous regime
of wheel nut inspections and checks is also in place.
Permanent jump-start connectors
Aggregate Industries > Venn Quarry, Devon > 01271 830831
Management at Venn Quarry, (Aggregate Industries, at Barnstaple, Devon) has addressed the risks
associated with conventional jump-starting by requiring the installation of permanent jump-start
connectors on all mobile plant. These connectors are permanently wired to the vehicle batteries with
heavy-duty battery cable, terminating in a socket (easily accessible from the ground) into which the “plug”
can only be inserted with the correct polarity. Risks of battery explosion are thereby greatly reduced, as is
the risk of severe damage to the vehicles’ electrics.
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Pole-mounted CCTV camera
CEMEX UK > Wickwar Quarry, Gloucestershire > 01454 294 521
At CEMEX’s Wickwar Quarry in Gloucestershire, there is now an enhanced ability to carry out
preventative maintenance inspections as well as plant problem-solving activities.
A pole-mounted camera system enables visual appraisal of places that are difficult or impossible to inspect
by direct human vision. The system comprises a CCTV camera affixed to the end of a lightweight pole,
which also carries a halogen light. The camera is connected to a portable colour monitor.
Examples of uses are for inspections of:
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