BI620102
Bucyrus Australia
Delta SBD 30MB3 Maintenance Manual
Traction Drive System
Traction Assembly
The traction drive system provides the necessary mobility for the 30MB3 miner to mine coal and to tram from place to place as needed. It includes:
• •
Independent RH and LH drive systems, each consisting of a water-cooled 55 kW DC variablespeed electric motor mounted to a drive gear case that powers drive sprockets to provide motion to the respective RH or LH crawler chain. A forward-mounted crawler chain idler roller on each side which is equipped with a greasepowered piston to adjust the crawler chain to its proper tension; once adjusted by movement of the grease, the idler roller is locked into position by a necessary number of shims, and pressure in the grease piston is relieved. An AC/DC solid-state electronic drive logic system which provides the operator with three speed ranges:
(a)
High speed which moves the miner at a rate of 26 metres/min, used mainly for flitting from one working face to another. (b) Intermediate speed at a rate of 13 metres/min, used mainly for rapid re-positioning of the miner within the face area. (c) Sump speed, fully adjustable by the operator to a preset value ranging from 0 to 10 metres/min for sumping the miner into the coal face. The adjustable sump speed setting allows the operator to select an optimum cutting speed when face hardness conditions vary, eg. Rock inclusions or roof/floor cutting.
Manual No. M01344
Page 12 of 23
December 2009
