1
5
Slew mOTOr
TroubleshooTing
5n0AX00
sleW moTor
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
how/Where?
major causes
remedies
motor fails to start
• No pressure at the motor’s inlet
port
• Set pressure of relief valve is too
low
• Pump faulty
• Control valve faulty
• Set correctly
• Repair or replace
• Repair or replace
• There is pressure at the motor’s
inlet port
• Load is too heavy
• hydraulic motor is faulty
• Reduce the load
• Repair or replace
motor does not
speed up
• Pump discharge is insufficient
• Too much drain from the pump
• Repair or replace
the pump
• Functional problem of the motor
• Drop in the motor’s volumetric ef
-
ficiency
• Replace the motor
Direction of rota-
tion is incorrect
• Piping
• Motor valve timing
• Piping is incorrectly connected.
• Motor valve timing is incorrect.
• Correct the piping.
• Set the valve timing
correctly
Oil is leaking
• Leaking from the mating surface
• Bolts are loose
• O-ring is faulty
• Mating surface is scratched
• Retighten the bolts
• Replace
• Repair the surface
with a grindstone or
sand paper
motor produces
abnormal noise
• Noise in the piping
• Piping support is faulty
• Clamp the piping
parking brake
symptoms
major causes
remedies
cannot release the
brake. brake force is
weak. Brake drags,
produces noise, heat
• Release pressure PB is not gener
-
ated or, supply pressure is low.
• Set the release pressure PB as specified.
• Valve does not operate due to high
drain pressure
• Check the drain circuit for clogging and repair. If drain
from the motor is too large, check and repair the mo
-
tor.
brake piston does not operate
• O-rings are abnormally worn
• Sliding parts are worn or dam
-
aged
• Foreign matter is caught
• Wear-resistant material is worn
• A spring is broken
• Replace
• Repair or replace the sliding parts
• Remove the foreign matter and repair or replace the
sliding parts
• Replace
• Replace
Summary of Contents for TB215R
Page 1: ...CC8E005 WETB215R_A XI Seral No 215000003...
Page 3: ...SAFETY 1...
Page 13: ...SERVICE DATA 2...
Page 16: ...SERVICE DATA DIMENSIONAL DRAWING 3 2 DIMENSIONAL DRAWING 2A0AX001 Operating range 2A0AX02...
Page 53: ...SERVICE DATA WIRE HARNESS DIAGRAM 2 2 WIRE HARNESS DIAGRAM 2H0AX00 Body harness 03342 68000...
Page 54: ...SERVICE DATA WIRE HARNESS DIAGRAM 3 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 55: ...SERVICE DATA WIRE HARNESS DIAGRAM 4 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 56: ...SERVICE DATA WIRE HARNESS DIAGRAM 5 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 57: ...SERVICE DATA WIRE HARNESS DIAGRAM 6 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 58: ...FUNCTION 3...
Page 88: ...DISASSEMBLY AND ASSEMBLY 4...
Page 125: ...DISASSEMBLY AND ASSEMBLY OPERATING DEVICE 6 4 OPERATING DEVICE 4F0AX00 Hydraulic piping...
Page 230: ......
Page 232: ...TROUBLESHOOTING 5...
Page 287: ...Other 6...