successive sections of the drill steel, you repeat the steps
NOTE: Clean and lubricate all drill steel sections
and coupling before storing.
After drilling four consecutive boreholes, the drill
steel should be rotated or changed.
Personnel, involved in rock drilling operations,
must adhere to the safety guidelines outlined in the U.S.
Army Corp of Engineers, Safety and Health
Requirements Manual, EM 385-1-1. Additional safety
precautions are as follows:
l Safety equipment, such as double-hearing
protection, safety goggles, respiratory protection, hard
hats, gloves, and safety boots, must be worn by all
personnel that are involved in rock drilling operations.
. Remember to retract the foot piece of the drill
guide from the drilling face before moving the drill rig.
Failure to do so can cause extensive damage to the
hydraulic components of the drill guide.
s Never use reverse rotation of the drill to break
tight or stuck coupling joints.
. Do NOT allow personnel, other than the operator,
to ride on the rock drill.
. Do NOT operate the drill with the coupling
resting on the centralizer arms.
. Do NOT move the drifter rotation control lever
from forward to reverse without first stopping the drill.
l When securing the drill, position the drill guide
in a 90-degree vertical position.
l When the operator is operating the rock drill from
the operators seat, all personnel must stay clear of the
drill control console,
. Visitors, unless suited properly with all safety
gear, must stay clear of rock drilling operations at a
distance of no less than 50 feet.
l Secure all drilling operations during thunder-
. Use gloves when handling drill steel, couplings,
and bits. These components get extremely hot when
used in rock drilling operations.
AND MAINTENANCE EQUIPMENT
Floodlights, generators, lubricators, pumps,
sweepers, and snow removal equipment are categorized
as miscellaneous construction and maintenance
This equipment is listed under the
registration series USN 50-00000.
The floodlight unit (fig. 14-27), commonly known
as a light plant, is intended for field use in all climates.
Being self-contained, it is especially suited for use in
remote locations as an emergency floodlight source.
The light plant unit consists of an engine generator
set, portable floodlights, extension cords, floodlight
mounts, and a grounding rod. The floodlights,
extension cords, floodlight mounts, and the grounding
rod are all accountable collateral gear, assigned to each
unit; therefore, it is important that these components are
returned and stored in their assigned light plant. All of
the components are mounted on a two-wheel trailer,
covered by a weatherproof sheet metal housing.
Mounting provisions for the floodlights are
provided inside the housing. The floodlights swivel in
different positions for distributing light over a large area.
Extension cords are supplied for using the floodlights
away from the unit. Special plugs are used on these
extension cords that are for use only with the floodlight.
NOTE: Do NOT run power tools from a light plant.
The power surge and power draw from these tools can
overload the exciter and result in damage to the
Before placing the light plant in operation, make
sure the unit is grounded, using the grounding rod and
grounding cable. Additionally, ensure the light plant is
positioned suitably for adequate operating room and
ventilation for dissipation of engine heat and exhaust.
Remove the number of floodlights and cables required
and place them in the desired locations. Plug the cables
into the output receptacles.