Removing Steel. verse the procedure used
in adding steel (e above) to dismantle the string of steel
with the following exceptions:
(1) Move the blow handle (fig. 2-1) to 1/4 "ON"
position only when raising the bottom steel.
(2) Before removing steel, always make sure
the steel coupling is above the centralizer and that the
centralizer is in the closed position. Neglecting to do this
could result in loss of the remaining steels, coupling and
bit in the hole.
Section II. OPERATION OF AUXILIARY EQUIPMENT
The pneumatic rock drill can be operated with any trailer
mounted air compressor with a capacity of 600 c.f.m.
(cubic feet per minute).
For operation of the air compressor, refer to the
applicable technical manual for compressor to be used
Section III. OPERATION UNDER UNUSUAL CONDITIONS
Operation in Extreme Cold (Below 32F.)
General. If the rock drill is to be operated in
below freezing temperatures, certain precautions must
be taken to assure continued normal operation.
Oil Reservoir Service. Service the oil
reservoir in accordance with LO 5-3820-241-12. Use the
Hydraulic Oil Reservoir. Service the
hydraulic oil reservoir in accordance with LO 53820-241-
Tramming Motors (2 ea used). Open level
plugs and drain off water until oil appears; close drain
Air and Hydraulic Systems. If operating in
sever cold (below 0°f.) (-18C.), complete the following:
(1) Before terminating the shift, introduce
one to two quarts of permanent type antifreeze into the
main air supply line.
(2) Operate all air functions briefly, allowing
the antifreeze to mix with any water that may be present
in the air lines.
Control Station. If control station handles
are iced up, apply heat to thaw the moving parts before
attempting to operate.
Operation in Extreme Heat
Refer to LO 5-3820-241-12 and lubricate
the equipment more frequently.
Adjust the drop rate of the airline lubricator
according to the characteristics of the oil, the
temperature, and the air consumption of the equipment.
Always blow out the air supply line before connecting it to
the rock drill inlet.
Operation in Dusty Areas
Always keep hydraulic oil reservoirs tightly
Service the hydraulic oil filter at more
Cover all ports immediately as soon as a
line is disconnected.
Refer to LO 53820-241-12 and lubricate the
equipment at more frequent intervals as required.
Keep the equipment clean. Pay special
attention to the condition of the feed chain and
sprockets, machined surfaces of the hydraulic cylinder
rod, and the sliding surfaces of the drill carriage.
f: Take all necessary precautions to prevent dirt,
dust, or sand from entering the pneumatic system.
Service the air strainer daily. Cover the air inlet when not
Provide maximum protection for the rock
drill when not in use by storing it in a shelter or covering
with a canvas cover.
Operation Under Rainy or Humid Conditions
a. Keep all exposed surfaces with preservative
oil. Pay special attention to damaged painted surfaces.
Cover all paint cracks and chip marks as soon as
possible to prevent corrosion.
Take all necessary precautions to prevent
moisture from entering the pneumatic system.
Service the air lubricator (para 4-19).
Cover the air inlet when equipment is not in use.
equipment when not in use.