Takeuchi TB53FR - After the Fuel Runs Out

HYDRAULIC UNITS
HYDRAULIC PUMP
IV-33 TB53FR
TROUBLESHOOTING
Symptom Probable Causes Remedy
• 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
engine.
• Investigate the cause of the bubbles and
repair it.
• Operate the engine at the specified speed.
• Check and replace the drain piping.
• Replace the damaged parts or replace
the pump.
Noise is loud. Abnormal
noise is generated.
• The suction hose is pinched or the suc-
tion 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 drain back pressure is higher than
the specified pressure.
• The bearing, etc. is mechanically dam-
aged.
• 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 horsepower setting adjustment
screw is loose.
• 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 increasing.
• 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.
• Reset the screw and lock it.
• Replenish the tank with hydraulic oil to
the specified level.
• Clean the piping.
• Repair the hydraulic device or replace
it.
• The relief valve setting has dropped.
•
The amount of leakage from hydraulic
devices other than the pump is increasing.
• The pump’s volumetric efficiency has
dropped.
• The peak pressure is generated due to a
drop in the relief valve’s response.
• There is foreign matter trapped in the
pilot line or foreign matter is caught in
the sliding parts of the control equip-
ment.
• Leakage from the pump is increasing.
• The bearings, etc. are mechanically dam-
aged.
• There is seizing of sliding parts.
• Seals are damaged.
• The shaft surface which slides against
the oil seal is worn.
• The plug or bolts are loose.
• Reset the relief valve setting.
• Repair the hydraulic device or replace
it.
• Replace the pump.
• Repair the relief valve or replace it.
• Remove the foreign matter and repair or
replace the scratched parts.
• Replace the pump.
• Replace the damaged parts or replace
the pump.
• Replace the damaged parts or replace
the pump.
• Replace the seals.
• Replace the shaft or replace the pump.
• Tighten them or replace the seals.
Discharge is insufficient.
Pressure doesn’t rise.
The rotational speed drops
when there is a dynamic
load.
Abnormal heat is gener-
ated.
Hydraulic oil is leaking.