Main Parts; Starting And Stopping The Machine - Atlas Copco Pionjar 120 Instrucciones Para El Operario

Main parts

Pionjär 120AV (fig. 1a)
Pionjär 120 (fig. 1b)
A. Handle (vibration damped on Pionjär 120AV)
B. Fuel screw
C. Choke
D. Air filter
E. Engine piston
F. Compression chamber for flushing air
G. Rotation mechanism (Pionjär 120 and 140)
H. Throttle
I. Starter handle
J. Fuel tank
K. Power take-off
L. Gas duct
M. Impact piston
N. Gas-duct valve
O. Function selector (Pionjär 120 and 140)
P. Tool holder
Starting and stopping the
Machine
Fuel mixing ratios (fig. 2)
Pionjär with cast-iron cylinder: oil-mixed petrol, 1
part oil to 12 parts petrol (8%).
Two-stroke oil
For the best results always use Atlas Copco's bio-
degradable two-stroke oil, wich has been specially
developed for Atlas Copco two-stroke engines. If
Atlas Copco two-stroke oil is not available then use
a two-stroke oil of good quality. Contact your near-
est Atlas Copco dealer for a recommendation of
two-stroke oils.
Starting (figs. 3-6a)
When cold-starting the engine, turn the choke
anti-clockwise (fig. 3).
Turn up the fuel needle (anti-clockwise) toward the
stop (fig. 4a). Pull the starting handle until the en-
gine starts (fig. 4b).
Open the choke fully by turning it fully clockwise
(fig. 5a).
After starting the engine (fig. 5b), let it warm up for
2-3 minutes before putting the machine to work.
Regulate the fuel supply so that the engine runs
cleanly. During normal operation the fuel needle
should be opened by approx. 0.5 of a turn (fig. 5c).
If the engine does not start, too much fuel may have
entered the combustion chamber. In this case, close
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the fuel needle by turning it clockwise, and start the
engine with the choke open.
The engine speed can be regulated by means of
the throttle (fig. 6a). When the throttle is released to
the "up" position, the maximum engine speed is
obtain-ed. Depressing the throttle halfway down
gives the engine idling speed. To stop the engine,
simply press the throttle to the bottom position.
If the machine is frequently started on top of long
tools such as probing rods etc; a starter-cord
bracket must be used to avoid damaging the cord
and cord bushing.
Starter-cord bracket for Pionjär 120, 130, 120AV:
Ordering No. 9238 2803 81.
Stopping the machine (figs. 6a and 6b)
To stop the engine, press the throttle all the way
down to the bottom position (fig. 6a). Then close
the fuel needle by turning it clockwise (fig. 6b).
N.B. Drain the fuel tank if the machine is to be
transported or stored for longer periods of time.
Operating the machine (fig. 7)
Tool shank (fig. 7)
Use a shank gauge to check that the tool shank
has the correct dimensions, i.e. 22x108 mm. Make
sure that the shank is clean and that the tool is in
good condition.
Flushing (fig. 8)
During drilling, make sure that the flushing hole
through the drill steel does not become blocked.
Fitting the tool (fig. 9)
Shut down the machine. Insert the tool shank into
the chuck and lock the tool retainer with your foot.
Function selector - Drilling (fig. 10)
Turn the function selector downward. This engages
rotation and flushing air for drilling.
Function selector - Breaking (fig. 10)
To adjust the direction of the tool blade, first put the
function selector into the neutral position.
Then lock the tool in the desired position by turning
the selector upward. This locks the rotation.
Collaring
Press the tool against the workpiece with the ma-
chine idling. Increase the speed of the engine once
the bit has gained a foothold in the material to be
drilled.
Grip the side handle to give better control of the
machine.
English
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