1-76 System Operation Section MD6750 Blasthole Drill
BI011043_EN
Controls for Leveling the Machine
MAST RAISING AND LOWERING The mast is normally left in the raised position for most situations including propelling from hole to hole on a blast pattern. Lowering the mast is necessary under three conditions: 1.
Maintenance work is not possible or too dangerous to perform with the mast up.
2.
Long moves over 1,000 feet (304 m) where the drill will be towed into position, propelled at high speed, or be loaded onto a trailer.
3.
Any situation when steep slopes are encountered. Contact Caterpillar Global Mining Service Department if unsure of slope limitation for propelling.
MAST RAISING CAUTION:
Raising or lowering the mast is a two-person job. Do not attempt to raise or lower the mast without the assistance of a helper familiar with the procedures involved.
CAUTION:
During the mast raising procedure personnel should be kept clear of the machine and the area immediately surrounding the machine, especially the front of the machine. No one is to be allowed on the mast, operator’s cab roof, or machinery house roof while the mast is in the air. Failure to heed this caution may result in the death or serious injury of personnel struck by the mast should it fall for some reason.
