Atlas Copco Secoroc YT29A User Manual

Trouble shooting
Problem Cause Solution
Decreased
penetration rate
Air leakage in hoses,
couplings
Change packings, and where
required, change parts in the
throttle valve.
Shank sleeve Check the shank sleeve for
excessive wear. Replace if
necessary.
Air leakage due to worn
piston/cylinder
Replace the piston and/or cylinder
Air leakage due to worn
guide sleeve/pilot guide
Change the worn part
Insufficient feed
force
Piston rod seal (in pusher
leg) worn or deformed
Change the seal
O-rings on pusher leg
coupling worn or deformed
Change the o-rings
Poor rotation Splines of the rifle nut worn Replace the rifle nut if the splines
are worn
Splines of the rifle bar worn
down
Replace the rifle bar when needed
Splines on the piston worn
down
Replace the piston when needed
The toothing in the ratchet
housing is worn out
Replace the ratchet housing if the
tooth housing is so worn that the
pawls have difficulty catching
The toothing in the ratchet
wheel is worn out
Replace the ratchet wheel if the
toothing is so worn that the pawls
have difficulty catching
Chuck nut worn out Replace the chuck nut if the
splines have been worn to 1/2 of
the spline width
Pawls worn Replace all pawls, all pawl springs
and all pawl pins.
Uneven running Piston has seized in the
guide sleeve or the piston
guide
Replace the guide sleeve/piston
guide. If required, polish the
piston. Check the piston for heat
damage such as blue colouring
and/or fissures. If it is damaged
in this way, replace the piston as
well.
Dirty or damaged
main valve. Caused by
impurities or foreign matter
entering the drill with the
compressed air.
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.
Freezing. Caused by leakage
in the flushing system or
by excess water in the
compressed air or by
excessive water pressure
Check the flushing tubes and seals
and the water pressure. Drain
water from the compressed air
system. If the problem continues,
fit a water separator in the airline
system.
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Atlas Copco Secoroc YT29A Specifications

General

Brand	Atlas Copco
Model	Secoroc YT29A
Category	Drill
Language	English