YK10-0015-DI-002-03
40
Trouble Causes Processing Method Reference
The
temperature
on the pump
surface is
abnormally
high.
4 Suction gas is hot.
Install a cooling device such as the
Gas cooler on the suction side.
－
5 Oil is stained. Replace to new oil. 3.6
6
Cooling water does not flow.
(Specified volume is not
flowing.)
Keep flowing the cooling water by
the specified volume. 3.4
7
Area around the Pump is
enclosed.
Make the ventilation available. 2.3
8
Is rotor rotation resisted?
Rotors do not rotate by
inertia.
Overhaul. 5.4
Oil leaks to
the outside
of the pump
1
Deterioration of the O-ring of
the cover.
Overhaul. 5.4
2 Oil inlet is loose. Tighten again the Oil inlet. －
3
Oil leak from the Mechanical
seal.
0.3 ml/hr or more:
Replacement of mechanical seal
0.3 ml/hr or less:
There is no problem. Continue to
use.
3.7
Water leak
outside the
Pump.
1
Coolant joints and so on got
loose, or not tighten.
Check and repair Joints and
so on.
3.4
Rotation is
uneven, and
so it was
going not to
rotate
gradually.
1
The motor pulley and the
pump pulley are not rotating.
Confirm whether electricity is
coming.
3.5
2 Belt is loosening. Re-tighten the belt. 3.8
3 The pulley key is loosening. Correct the loosening. －
4 Oil is dirty. Replace to new oil. 3.6
The motor
current value
is abnormal.
1
Foreign substance entered
inside the Pump impaired the
Motor rotation.
Overhaul, removal of foreign
substance inside the Pump.
5.4
2
Isn't the use pressure is the
maximum inlet pressure or
more?
Pressure confirmation for the inlet
side and the exhaust side
Inspection for the backing pump
2.2
2.4
Initially,
performance
was being
satisfied, but
the vacuum
degree
became
decreased.
1
Foreign substance entered in
the pump, and the surface of
the rotor was scratched.
Conduct the overhaul (replacement
of the Casing, Rotor, Cover and so
on.)
5.2
5.4
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