Atlas Copco Pionjar Service manual

Motor Drills
and Breakers

Contents:
Two types of machines_________________________ 4
Correct fuel mixture____________________________ 6
Daily checks __________________________________ 6
Safety first ____________________________________ 8
A tool for every job ____________________________ 10
Cutting and compacting asphalt ________________ 12
Concrete breaking_____________________________ 14
Tie tamping ___________________________________ 15
Drilling________________________________________ 16
Rock splitting _________________________________ 20
Anchoring_____________________________________ 21
Post driving ___________________________________ 22
Fencing_______________________________________ 22
Digging _______________________________________ 23
Accessories___________________________________ 24
More information ______________________________ 26

Atlas Copco motorized drills and
breakers are designed for splitting rocks,
breaking concrete, cutting asphalt, tamping
ballast, digging and other tasks.
This booklet will help you become familiar
with the machines. You´ll find basic tech-
nical information, simple instructions for
their use and an idea of the range of jobs
they are suitable for.
3

4
Two types of machine
cover most applications
• Combined drill/breaker, Pionjär and PICO 14.
Powered by a two-stroke engine with an integrated impact
mechanism, the combined drill/breaker is equipped with
rotation and air flushing mechanism for drilling applica-
tions. The function selector allows you to switch between
drilling and breaking/driving applications.

5
• Heavy duty breaker, Cobra mk1. Also powered by
a two-stroke engine, the Cobra mk1 has a separate im-
pact mechanism activated by pressing the machine
down. Thus, the engine can be run without engaging the
impactmechanism.Aspowerful as a 27 kg (60 lbs) pneu-
matic breaker, the Cobra mk1 is suitable for very de-
manding breaking and driving jobs.

6
Correct fuel mixture
Use the correct fuel mixture, basedonfreshfuelandoil.
Pionjär 120/130 ________ 8%_____ (1:12)
Pionjär 140/150 ________ 5%_____ (1:20)
PICO 14 _________________ 4%_____ (1:25)
Cobra mk1 ______________ 2%_____ (1:50)
Cobra 149/248 _________ 5%_____ (1:20)
Too little oil in the mixture will result in insufficient lubri-
cation and increased wear. Too much oil clogs up ex-
haust ports and channels. Exceptionally dirty fuel filters
should be replaced.
Seeinstruction book for detailedinformationon main-
tenance and servicing.
Daily checks
Simple daily maintenance will ensure trouble-free opera-
tion.
Check the spark plug regularly. Dirty or burnt-out
electrodes impair performance. Check the electrode gap.

7
Electrode gaps:
Pionjär________________________1.5/0.060”
PICO 14______________________0.5/0.020”
Cobra mk1___________________0.5/0.020”
Cobra 149/248______________1.5/0.060”
Clean the air filter and housing daily. A clogged filter
will cause excessive engine wear and carbonization
which clogs up exhaust ports and channels. Never use
themachine without theairfilter.Dustandstone particles
can enter the cylinder.
Check the impact mechanism oil level daily (on the
Cobra mk1). Place the machine in an upright position
and top up as necessary.

8
Safety first
For your own safety, always wear protective clothing
– glasses, gloves, shoes or boots with steel toecaps, ear
protectors and a hard hat.
For ease of operation use
your thigh as support when
running the machine.
Ear protectors Hard hat
Shoes or
boots with
steel toecaps
Glasses
Gloves

9
Both the Pionjär and the Cobra mk1 have handle designs
that shield the operator from a large proportion of harm-
ful vibrations and shock recoil.
On the Pionjär shock-absorbent rubber bushings reduce
vibration levels.
The Cobra mk1 incorpo-
rates H.A.P.S, (Hand and
Arm Protection System),
Atlas Copco’s unique anti
vibration design. The leaf
spring construction
virtually eliminates
vibrations.
Avoid running the engine close to flammable material
or in poorly ventilated areas.
Always empty the fuel tank before transportation and
storage.

10
A tool for every job
Always use the correct tool for the job - it saves time and
effort. Our motorized breakers and drills have tools for a
variety of applications.
Moilpoint Concrete
chisel
Wide chisel Wedge
Digging blade Asphalt cutter
Reinforced
asphalt
cutter Spade