Takeuchi TB215R Workshop Manual

TROUBLESHOOTING
TRAVEL MOTOR
1
5
TRAVEL MOTOR 5M0AQ00
TRAVEL MOTOR
“4. Disassembly and assembly, Travel motor”
Hydraulic motor
2nd-speed control
Symptoms Major causes Remedies
Motor fails to start • All the devices other than the motor and
the reduction gears are not working
correctly.
• Check whether the specified pressure is
generated in the inlet port, and then check
and repair each device.
• Pressure oil is not flowing properly due
to abnormal wear of the motor’s sliding
part.
• Replace the abnormally worn out part(s).
• Motor is faulty, as its main components
are damaged.
• Replace the damaged part(s).
Rated speed cannot be
obtained
• Specified volume of flow is not supplied
to the motor due to the faulty oil pump.
• Check whether the specified pressure is
generated in the inlet port, and then check
and repair each device.
• Motor volume efficiency becomes low. • Check if there is abnormal wear on the slid-
ing part; if so, repair or replace it.
Rotational fluctuations are
large
• High-pressure oil is leaking from the
drain port, because the motor’s sliding
part is worn out.
• Replace the abnormally worn part, if any.
• Bearing is worn out. • Replace the abnormally worn part, if any.
Oil leak • Oil leak due to O-ring breakage. • Replace the oil seal and O-ring.
• Oil seal is broken by the internal pres-
sure generated in the motor case due
to the abnormal wear of the sliding part
of the motor.
• Repair the motor and replace the oil seal.
• Pressure increase in the drain piping
caused by the clogging of foreign mat-
ter resulted in breakage of oil seal.
• Clean the clogging in the drain piping and
replace the oil seal.
Symptoms Major causes Remedies
Straight-ahead traveling
level is low, switching to
2nd-speed travel is dis-
abled
Spool cannot be switched.
• Foreign matter is caught. • Remove foreign matter and correct or re-
place the faulty part(s).
• Spring is missing. • Install the spring.
• Spring is damaged. • Replace the spring.
• Oil leak due to the abnormal wear of the
2nd-speed control piston.
• Replace the 2nd-speed control piston.
• 2nd-speed control piston is missing. • Install the 2nd-speed control piston.
• Ball is abnormally worn out. • Replace the ball.

Takeuchi TB215R Specifications

General

Brand	Takeuchi
Model	TB215R
Category	Excavators
Language	English