147. Tabulated data
Manufacturer .................................................................................. Le Roi-Cleveland
Model number ................................................................................ H 111
Weight ............................................................................................ 7 lbs
Overall length ................................................................................. 23 5/8 in.
Bore and stroke.............................................................................. 2 5/8 x 2 3/4 in.
Recommended hose size .............................................................. in.
Air hose connection ....................................................................... -in. pipe
Recommended air pressure .......................................................... 80 psi
Air requirements............................................................................. 95 cfm
148. Precautions
a. Never neglect the necessary lubrication procedures (par. 150a)
b. Be sure to blow out the air hose before connecting it to the drill air connection.
c. Always turn off the drill before laying it down.
d. Inspect the nuts, bolts, and oil plug of the drill frequently for tightness. Loose nuts and bolts allow excessive play
between parts causing early wear and unnecessary loss of air pressure.
e. Clean the drill frequently (as often as once a shift) using the same flushing methods as described in paragraph
f. Always detach air hose from drill when stopping operations for any length of time.
149. Operation
a. Fill the oil reservoir of the drill with oil (par. 150a), and pour about two tablespoonfuls of oil into the air inlet.
b. Blow out the air hose and connect it to the air inlet pipe connection.
c. Operate drill at slow speed to insure even distribution of oil to all internal working parts.
d. When starting a hole use a 2-foot drill steel, even if the rock is soft and fast cutting. Start the drill with the bit
between boots at the slow speed; after the hole is approximately 1 in. deep, push throttle valve down to fast speed. When
starting a hole the largest size bit should be used until the hole is approximately 2 ft. deep; then the next smallest size is
used for the next 2 ft., and so on.
e. When drilling deep holes, blow the cuttings from the hole frequently by pulling the throttle valve up to the top
position. This will insure that the drill is cutting on fresh rock at all times.
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