Axles mounted to a
commercial vehicle in front of the drive axle to form a close-coupled bogie are
termed 'Mid Axles' or 'Pushers'. They have a 'Drop Centre' in the tube to allow
clearance from the propeller shaft. Granning offer a wide range of suspensions
and axles for this purpose in order to ensure that the additional equipment
compliments the original vehicle specification.
Granning can supply Disc or Drum braked axles to
carry tyre sizes from 17.5" to 22.5" and are available for twin
wheel, single offset wheel and single centre knave configuration.
The RM series of
suspensions are usually installed for this purpose they are compact and well
proven with a twin lift system making installation simple and straight
forwards. Popular applications are Tractor unit mid axle taking the tractor
from a 4x2 18000kg gross vehicle weight to a 6x2 23000kg Artic that has the
three axle configuration required to operate at 44000kg gross train mass.
The axle can be lifted when the vehicle is unladen
thus saving tyre wear and allowing the drive axle to carry more mass giving
greater traction. A number of Artics and specialist vehicles employ Granning
600 series mid axles in order to fit space saving 17.5" tyres thus giving
maximum room for fuel tanks and bodywork equipment.
Type Approval for such
conversions is offered for a number of countries including the UK and Ireland.