BI619559
Bucyrus International, Inc. 495HD Electric Mining Shovel
An external means of preventing machine rotation must be used - if the dipper is not resting firmly on the ground and if any of the following are true: •
Two brakes are not effectively set and coupled to the motors, or
•
The motors and geartrain are not fully coupled to the swing pinions, or
•
The swing pinions are not engaged to the swing rack
The preferred method to prevent machine rotation is to use a pair of one inch diameter steel cables to tie the upper works to the lower works. Other alternatives such as welded plates etc. can also be used.
To use the steel cables, attach one end of each cable to the bottom surface of the revolving frame. Attach the other end of each cable to the top surface of the truck frame. This arrangement will prevent relative motion between the revolving frame and the truck frame. Installation of these cable restraints should become a part of the lockout procedure if conditions so warrant. For typical part numbers and locating dimensions, refer to Bucyrus drawing E021447
Apr. 2009
1-7
Manual No. 10757
