LR3/Disco 3
Transfer Box Power Flow
The input torque, from the transmission, is transferred to the input shaft of the transfer box and then onto the planetary
sun gear and planetary pinion gears. The planetary pinion gears are held in place by the planet pinion shafts, which are
connected to the differential carrier, and drive the differential pinion gears. The torque is then distributed to both the front
and rear carriers, which are connected to the outputs of the transfer box. The rear carrier is connected directly to the rear
output flange; the front carrier is connected to the sprocket and therefore to the chain drive, which provides the front
output flange rotation.
TRANSFER BOX CASINGS
The front and rear casing assemblies are manufactured from cast aluminium.
Front Casing Assembly
The front casing assembly provides the location for the input shaft bearing and the front output flange bearing. It is also
equipped with threaded holes to mount the chassis mounting bush, two lifting eyes and a breather cartridge for the
transfer box breather pipe. The breather pipe allows an equalisation between atmospheric and internal transfer box
pressure.
Rear Casing Assembly
