Takeuchi TL150 Workshop Manual

IV-134
HYDRAULIC UNITSTRAVEL MOTOR
TROUBLESHOOTING
Hydraulic motor
Symptoms Major causes Remedies
Motor fails to start • All the devices other than the motor and the
reduction gears are not working correctly
• Pressure oil is not flowing properly due to
abnormal wear of the motor·s sliding part
• Motor is faulty, as its main components are
damaged
• Check whether the specified pressure
is generated in the inlet port, and then
check and repair each device.
• Replace the abnormally worn out
part(s).
• 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
• Motor volume efficiency becomes low
• Check whether the specified pressure
is generated in the inlet port, and then
check and repair each device.
• Check if there is abnormal wear on the
sliding part; if so, repair or replace it.
Rotational fluctua-
tions are large
• High-pressure oil is leaking from the drain
port, because the motor·s sliding part is
worn out
• Bearing is worn out
• Replace the abnormally worn part, if
any.
• Replace the abnormally worn part, if
any.
Oil leak • Oil leak due to breakage of oil seal and O-
ring
• Oil seal is broken by the internal pressure
generated in the motor case due to the ab-
normal wear of the sliding part of the mo-
tor
• Pressure increase in the drain piping caused
by the clogging of foreign matter resulted
in breakage of oil seal
• Replace the oil seal and O-ring.
• Repair the motor and replace the oil
seal.
• Clean the clogging in the drain piping
and replace the oil seal.
2nd speed control
Symptoms Major causes Remedies
Straight-ahead trav-
eling level is low,
switching to 2nd
speed travel is dis-
abled
Spool cannot be switched
• Foreign matter is caught
• Spring is missing
• Spring is damaged
• Oil leak due to the abnormal wear of the
2nd speed control piston
• 2nd speed control piston is missing
• Ball is abnormally worn out
• Remove foreign matter and correct or
replace the faulty part(s).
• Install the spring.
• Replace the spring.
• Replace the 2nd speed control piston.
• Install the 2nd speed control piston.
• Replace the ball.

Takeuchi TL150 Specifications

General

Travel Speed - High	11.2 mph (18 km/h)
Max Travel Speed	12.4 km/h
Width	1880 mm
Height	2320 mm
Lift Height	10.5 ft (3.2 m)