BI617000
Bucyrus International, Inc. 495HD Electric Mining Shovel
SADDLE BLOCK The saddle block is positioned between the boom side girders in the mid-section of the boom. It pivots on manganese-bronze bushings about the shipper shaft. It acts as a guide for the longitudinal movement of the dipper handle. The free-floating design of the handle in the saddle block eliminates handle torsion.
DIPPER HANDLE The dipper is attached to one end of the large diameter handle. The crowd rope half-sheave is attached to the other end. A hydraulic rope take-up mechanism at the dipper end, and the crowd rope adjusting mechanism are used to remove slack from the crowd/retract rope system. The dipper handle crowds out and retracts within the saddle block. An electrical rate reduction circuit, along with the crowd ropes, absorb digging shock loads encountered when the dipper is crowded into the bank.
Manual No. 10429
38
Aug. 2006
