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Drilling deep holes (fig. 11)
First drill a short drill steel all the way into the hole.
Then change to a longer drill steel with a slightly
smaller bit diameter (approx. 1 mm smaller).
Regular service
Air filter (fig. 12)
Clean the air filter regularly, at least once a shift if the
machine is in continuous use.
Turn the locking spring of the filter housing to the
side, and take out the filter housing and filter. Tap the
filter carefully with the palm of your hand, or blow
through it carefully with compressed air.
N.B. Blow from the inside out.
If the filter is very dirty, it should be replaced.
Paper filters must never be washed.
Gas duct (fig. 13)
The gas duct must be checked regularly and cleaned
of carbon deposits.
Pull the starter handle slowly until the arrow at the
centre of the flywheel points upward (which means
that the engine piston is at its upper turning position).
Unscrew the gas-duct valve and take out the clean-
ing rod. Use the accompanying cleaning needle to
clean both the duct and the cleaning rod.
Check that the ball in the gas-duct valve is not stuck.
Maintenance
Spark plug (fig. 14)
Remove the spark-plug cap and then remove the
spark plug with the aid of a plug spanner.
If the spark plug is dirty or burned, it should be re-
placed. Use an original spark plug type Motorcraft
AE6 or Bosch W7A.
If the spark plug is wet with fuel, dry it with a clean
cloth and check the spark. Then pull the starting han-
dle 2-3 times to get rid of any excess fuel.
Fit the spark plug back into the cylinder.
The electrode gap should be 1.5 mm.
6
All manuals and user guides at all-guides.com
Changing the starter cord (figs. 15a-
15d)
Remove the protective cover of the starter mecha-
nism, at the same time grasping the starter pulley so
that it comes off with the cover. Carefully let the cover
rotate in order to release the spring tension. Remove
the old starter cord.
Fit the new starter cord.
Check the gasket between the fuel tank cover and
the protective cover. Oil the starter pulley's needle
bearing. Fit together the starter pulley and protective
cover, with the starter spring fixed into the starter pul-
ley. Wind all of the cord on to the starter pulley.
Pre-tension the starter spring by turning the pulley
clockwise by approx. 360° relative to the cover be-
fore mounting the assembly. Pull the starter handle
carefully in order to locate the cover correctly. Fit and
tighten the nuts for the protective cover.
Chuck bushing (fig. 16)
I the chuck gauge provided can be inserted all the
way into the chuck bushing (i.e. between the flats of
the bushing), this indicates that the bushing is worn
out and must be replaced.
Fault finding
If the machine does not start, is difficult to start, runs
unevenly or has low power output, check the figures
2 - 16.
If, after checking the figures, the machine still does
not function satisfactorily, please contact your near-
est Pionjär workshop.
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