MINI MACHINES Ӏ CRANES AND CARRIERS
pack which is monitored by a
BMS (battery monitoring system) fully integrated into the machine's electronics for safety. As with all electric power, maintenance and servicing are only needed at longer intervals and are much simpler than with diesel; indeed, in comparison, they are virtually maintenance-free. The low voltage battery allows
troubleshooting without the need of a dedicated service licence. As well as being low voltage the
Manitex Valla’s new chain lifter
Maeda’s new
MK Series Model: the MK3053C
battery is high capacity: it can power the 12kW motor pump for ten working hours on a 35% duty cycle. A ‘Start&Stop’ system on the pump gives a considerable further savings in energy and reduces the hydraulic maintenance needs. (The ‘virtually maintenance-
free’ phrase used above applies to the crane’s electric motors; it does not include the hydraulics, the requirements of which are much the same as in a diesel- powered machine). The crane can be recharged with both single- phase (230V) or three-phase (400V) chargers. The complete recharge, from zero to 100%, can be completed in six-and-a-half hours and the crane can continue to operate at full power during that recharging period.
NARROW TRACK Last summer Maeda launched a new MK series model: the MK3053C. It has a capacity of 2.98 tonnes at 1.8 metres, a
26 CRANES TODAY
maximum working radius of 14.3 metres, and a maximum lifting height of 16.95 metres. The main boom has a four-fall hook mode; there is full proportional radio control, automatic and stepless multiple outrigger settings, and a detachable negative-angle jib which can be attached by one operative working alone. Dimensions are all-important
for a mini-crane – it is, after all, a large reason for their existence: being small enough to get into residential buildings and confined spaces is why they were devised in the first place.
The MK30353C is 3,195mm
long by 1,945mm high by a remarkably narrow 780mm wide when the tracks are retracted for tight access. They can extend, however, to 1050mm. White rubber tracks can be supplied for non-marking indoor use. Maeda claims that it is this model is more versatile than its predecessors. Full radio control and stepless
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