Takeuchi TB215R Workshop Manual page 286

Slew mOTOr
If you notice that the noise or heat becomes unusually high, it is likely that there is a fault in the machine. If it occurs, stop
the machine immediately and try to locate the faulty section.
The table below shows the cause of the general problem and action to be taken when such problem occurs in the hydraulic
circuits.
hydraulic motor, brake valve
symptoms
motor fails to start • No pressure at the motor's inlet
port
• There is pressure at the motor's
inlet port
motor does not • Pump discharge is insufficient
speed up
• Functional problem of the motor
Direction of rota- • Piping
tion is incorrect • Motor valve timing
Oil is leaking • Leaking from the mating surface
motor produces • Noise in the piping
abnormal noise
parking brake
symptoms
cannot release the • Release pressure PB is not gener-
brake. brake force is
weak. Brake drags,
• Valve does not operate due to high
produces noise, heat
brake piston does not operate
• O-rings are abnormally worn
• Sliding parts are worn or dam-
• Foreign matter is caught
• Wear-resistant material is worn
• A spring is broken
sleW moTor
how/Where?
major causes
ated or, supply pressure is low.
drain pressure
aged
major causes
• Set pressure of relief valve is too
low
• Pump faulty
• Control valve faulty
• Load is too heavy
• hydraulic motor is faulty
• Too much drain from the pump
• Drop in the motor's volumetric ef-
ficiency
• Piping is incorrectly connected.
• Motor valve timing is incorrect.
• Bolts are loose
• O-ring is faulty
• Mating surface is scratched
• Piping support is faulty
• Set the release pressure PB as specified.
• Check the drain circuit for clogging and repair. If drain
from the motor is too large, check and repair the mo-
tor.
• Replace
• Repair or replace the sliding parts
• Remove the foreign matter and repair or replace the
sliding parts
• Replace
• Replace
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TroubleshooTing
Slew mOTOr
remedies
• Set correctly
• Repair or replace
• Repair or replace
• Reduce the load
• Repair or replace
• Repair or replace
the pump
• Replace the motor
• Correct the piping.
• Set the valve timing
correctly
• Retighten the bolts
• Replace
• Repair the surface
with a grindstone or
sand paper
• Clamp the piping
remedies
5n0AX00
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