TM 5-3820-239-15
and no manual repositioning or connections are
1-2). This arrangement, used for tramming,
required.
allows the operator to stand on the operator's
behind the unit while operating the propelling
mounted on the drill guide and is positioned
by a chain drive. The power guide extension
below.
mounting contains a drill guide extension cyl-
c. Towing the Pneumatic Drill. The traction
inder which is hydraulically controlled from
drive allows the propelling air motors to be
declutched and the brake deactivated for tow-
against the ground for added stability. The
ing. In this way, the tracks turn freely when
the pneumatic drill is being towed to a new
drill itself is operated from the remote control
manifold, which has five valves, four of which
are used. A rotation selector valve drives the
convenient connection point for towing pur-
drifter drill in the desired direction of rotation.
poses.
A drill feed control valve moves the drill up
d. Propelling Controls. The propelling con-
and down. A drill throttle control valve se-
lects the speed of drilling. A blow line valve
control arm which can be mounted in one of
allows air to clean out the hole.
three locations for operator convenience. If the
operator desires to stand on the operator's
platform while tramming, the controls are
1-4. Identification and Tabulated Data
mounted on a fixed bracket on top of the boom
a. Identification The Ingersoll-Rand Model
CM150A/D475A pneumatic drill has one ma-
walk either alongside or behind the pneumatic
jor identification plate. The information con-
drill, the propelling controls are attached to a
tained on the plate is listed below.
propelling control arm which can be swiveled
to the side or to the rear of the unit. The pro-
U.S. Army
pelling controls consist of two identical con-
Drill, pneumatic, drifter
MODEL--CMl50A/D475A
trol valves, each of which controls one track
CONTR NO.--DAAK01-67-C-D096
independently of the other. The valves can be
SER
moved either forward or back, and are spring-
CAPACITY
returned to the center (off) position for safety.
REG NO.
FSN 3820-854-4149
The independent action of each valve permits
GVW 8,600 LB
turning in a smaller radius than would normal-
LG--192 IN.
ly be possible in a unit of this size.
HGT--72 IN.
W--84 IN.
e. Drifter Drill Positioning. The hydraulic
SHIP WT--8,600 LB
CUBE--700 FT
hydraulically-operated (boom lift and boom
DATE MFD--1967
swing) cylinders which position the entire drill
ENG SER
guide and power dump and swing assembly as
WARRANTY
DATE SHIPPED
required for drilling operations. The complete
DATE INSP
range of boom travel is 100 in a horizontal
INSP STAMP
direction and 82 in a vertical direction. The
MFD BY--Ingersoll-
power dump and swing assembly (fig. l-l)
Rand
consists of a dump cylinder and swing cylinder
b. Tabulated Data.
which hydraulically position the drill guide at
(1) Pneumatic drill.
the desired drilling angle. The power dump
Manufacturer - - - - - - - - - - Ingersoll-Rand
and solving assembly permits a full 180 vertical
Model - - - - - - - - - - - - - - CM150A/D475A
travel of the drill guide. All positioning is
Type - - - - - - - - - - - - Self-propelled
Specification- - - - - - - - - - - - - MIL-D-52335 (MO)
1-2