Takeuchi TB215R Workshop Manual

TROUBLESHOOTING
PISTON PUMP
1
5
PISTON PUMP 5I0AQ00
PISTON PUMP
Symptoms Major causes Remedies
Noise is too loud, unusual
sound is heard
• Suction hose is crushed or suction filter
is clogged.
• Remove the dirt and correct the crushing.
• Joint in the suction side is loose and
sucking air.
• Retighten each joint.
• Cavitation is being produced due to too
high viscosity of the hydraulic oil.
• Replace with hydraulic oil of proper viscos-
ity.
• Pump and engine are not center
aligned.
• Center them again.
• Frothing of hydraulic oil. • Investigate the cause of frothing and cor-
rect it.
• Engine RPM is too high. • Run at the rated RPM.
• Mechanical damage to the parts (e.g.,
bearing).
• Replace the damaged part(s) or the pump.
Discharge is insufficient • Engine RPM is too low. • Run at the rated RPM.
• Oil temperature is too high. • Stop running, and check the temperature
again after the oil cools down.
• Viscosity of hydraulic oil is too high. • Replace with hydraulic oil of proper viscos-
ity.
• Pump volume efficiency becomes low. • Replace the pump.
• Hydraulic oil tank level is too low. • Add oil to the specified level.
• Clogging in the suction piping or the
suction filter.
• Clean the piping.
• Leak volume of hydraulic devices other
than the pump is increased.
• Repair or replace the leaking hydraulic de-
vice.
Pressure is not increased • Set pressure for the relief valve drops. • Set the relief valve pressure again.
• Leak volume of hydraulic devices other
than the pump is increased.
• Repair or replace the leaking hydraulic de-
vice.
• Pump volume efficiency becomes low. • Replace the pump.
Abnormal heat is generat-
ed
• Leak volume from the pump is in-
creased.
• Replace the pump.
• Mechanical damage to the parts (e.g.,
bearing).
• Replace the damaged part(s) or the pump.
• Seizing on the sliding part. • Replace the damaged part(s) or the pump.
Oil leak • Seals are damaged. • Replace the seal(s).
• Sliding part between the shaft and the
oil seal is worn out.
• Replace the shaft or the pump.
• Plugs and bolts are loosened. • Retighten the plugs and bolts, or replace
the seals.

Takeuchi TB215R Specifications

General

Brand	Takeuchi
Model	TB215R
Category	Excavators
Language	English