Takeuchi TL150 Workshop Manual

IV-32
HYDRAULIC UNITSHST PUMP
Hydraulic Pump
Trouble Probable Causes Remedy
Noise is loud. Ab-
normal noise is
generated.
• The suction hose is pinched or the suction
filter is clogged.
• The suction side joint is loose and air is
being sucked in.
• The hydraulic oil·s viscosity is too high
and cavitation is occurring.
• The pump is off center with respect to the
engine.
• There are bubbles in the hydraulic oil.
• The engine·s speed is higher than the
specified speed.
• The bearing, etc. is mechanically dam
-
aged.
• Remove the dirt or eliminate the pinched
condition of the hose.
• Retighten each joint.
• Replace the hydraulic oil with oil of the
proper viscosity.
• Center the pump with respect to the en
-
gine.
• Investigate the cause of the bubbles and
repair it.
• Operate the engine at the specified
speed.
• Replace the damaged parts or replace the
pump.
Discharge is insuf-
ficient.
• The engine·s speed is too low.
• The oil temperature is abnormally high.
• The hydraulic oil·s viscosity is too high.
• The pump·s volumetric efficiency has
dropped.
• The oil level in the tank is low.
• The suction side pipe or the suction filter
is clogged.
• The amount of leakage from hydraulic
devices other than the pump is increas-
ing.
• Operate the engine at the specified
speed.
• Stop the machine and let the oil cool off,
then check again.
• Replace the hydraulic oil with oil of the
proper viscosity.
• Replace the pump.
• Replenish the tank with hydraulic oil to
the specified level.
• Clean the piping.
• Repair the hydraulic device or replace it.
Pressure doesn·t
rise.
• The relief valve setting has dropped.
• The amount of leakage from hydraulic
devices other than the pump is increas-
ing.
• The pump·s volumetric efficiency has
dropped.
• Reset the relief valve setting.
• Repair the hydraulic device or replace it.
• Replace the pump.
Abnormal heat is
generated.
• Leakage from the pump is increasing.
• The bearings, etc. are mechanically dam-
aged.
• There is seizing of sliding parts.
• Replace the pump.
• Replace the damaged parts or replace the
pump.
•
Replace the damaged parts or replace the
pump.
Hydraulic oil is
leaking.
• Seals are damaged.
• The shaft surface which slides against the
oil seal is worn.
• The plug or bolts are loose.
• Replace the seals.
• Replace the shaft or replace the pump.
• Tighten them or replace the seals.

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)