Troubleshooting
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TROUBLESHOOTING
The table below is prepared for the person in charge of maintenance to be able to take corrective
measures immediately when hydraulic breaker trouble occurs. Understand the details of the situation
shown below when trouble occurs, and then contact the distributor.
Situation Cause Correction
1. Hammering operation
not available
(I) Hydraulic oil is not
supplied to the oil inlet of
the breaker.
(II)The hydraulic oil is
supplied sufficiently to the
oil inlet of the breaker.
(a)Failure of hose and pipe
• Clogging or breakage of the
pipe system
(b)Failure of operation valve
system
• Fallen or damaged tie-rod or
control cable
(c) Insufficient hydraulic oil
(d)Failure inside the breaker
(a)Inspection, repair, or
replacement of piping system
(b)Inspection, repair, or
replacement of valves
(c) Refill the hydraulic oil tank
(d)Ask the distributor for an
overhaul
2. Hammering operation is
available but the
hammering force is weak.
(I) High-pressure oil is not
supplied sufficiently to the
oil inlet of the breaker.
(a)Failure of hoses and pipes
• Clogged piping system
• Oil leakage
(b)Failure of operation valve
system
• Deformed pedal
• Deformed control cable
• Galling of control valve
(c) Insufficient hydraulic oil
(d)Contamination and
deterioration of hydraulic oil
(e)Pump out of order
(f) Drop in preset pressure of the
relief valve
(a)Inspection, repair, or
replacement of piping system
(b)Inspection, repair, or
replacement of operation
valve system
(c) Refill the hydraulic oil tank
(d)After cleaning the tank,
change the oil completely
(e)Ask the base machine
distributor for an overhaul
(f) Ask the base machine dealer
for maintenance
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