Technical data
Troubleshooting
SolutionCauseProblem
Change seals, and where required, change parts in the penetration
throttle valve
Air leakage in hoses, couplingsDecreased penetration
rate
Grind the main valve so that it seals properlyMain valve leaking (flipper valve)
Check the rotation chuck bushing with the gauge
1
for excessive
wear. The limit for permissible wear is reached when the template
can be pushed so far in between the two opposite sides of the
hexagonal hole that its shoulders make contact with the bushing
Rotation chuck bushing
Change the piston and/or cylinderAir leakage due to worn piston/cylinder
Change the worn partAir leakage due to worn intermediate
part/pilot guide
Let the ice thaw at room temperatureIce formation in the silencer
Change the sealPiston rod packing worn or deformedInsufficient feed force
Replace the rifle nut if the splines are wornSplines of the rifle nut wornPoor rotation
Replace the rifle bar when neededSplines of the rifle bar worn down
Replace the piston when neededSplines on the piston worn down
Replace the ratchet housing if the tooth housing is so worn that the
pawls have difficulty catching
The toothing in the ratchet
Replace the ratchet wheel if the toothing is so worn that the pawls
have difficulty catching
The toothing in the ratchet
Replace the chuck nut if the splines have been worn to
1
⁄
2
of the
spline width
Chuck nut worn
Replace all pawls, all pawl springs and all pawl pinsPawls worn
Change the intermediate part/piston guide. If required, polish the
piston. Check the piston for heat damages such as blue colouring
and/or fissures. If it is damaged in this way, change the piston as
well
Piston has seized in the intermediate part
or the piston guide
Uneven running
Clean and polish the valve so that it seals against the corresponding
cylindrical and plane sealing surfaces. If this is not possible because
the defects are too serious, the valve must be replaced
Dirty or damaged main valve. Caused by
impurities or foreign matter entering the
drill with the compressed air
Check the flushing tubes and seals and the water pressure
2
. Drain
water from the compressed air system. If the problem continues,
fit a water separator in the airline system
Freezing. Caused by leakage in the
flushing system or by excess water in the
compressed air or by excessive water
pressure
2
Check and repair any damage to the contact points and tighten the
bolts with the correct tightening torque
The side bolts are unevenly or
insufficiently tightened. Can cause the
various parts to lose their alignment,
resulting in seizure of the moving parts.
Uneven running (cont.)
Abnormal strains on the side bolts may
result in fracture at the threads.
Check the chuck bushing with the specially designed gauge
1
. The
maximum permitted wear limit has been reached when the gauge
1
, inserted between two opposite flat surfaces, touches the bottom.
Check the water pressure
2
- it must be lower than the air pressure
2
.
Insufficient lubrication (Can cause
possible secondary damage)
Abnormal wear of the
rotation chuck bushing
Add oil and check that it runs through. It is not sufficient that there
is oil in the exhaust air. There must also be an oil coating on the
shank of the drill steel. Check that the lubricator is connected in the
right direction.
Lack of oilThe drill gets hot
Use water trapsMoisture in the compressed airFreezing
Lower the water pressureWater pressure higher
2
than the air
pressure
Change drill steel or chuck bushing or bothMisalignment of the shankWater pipe breakage
Change drill steelDamaged flushing hole in the shank
© 2012 Atlas Copco Construction Tools AB | No. 9800 0627 71f | 2012-06-30
Original instructions
24
BBC 16W, 16WS, 34W, 34WS, 34WTHSafety and operating instructions
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