ULTRASOURCE ULTRAVAC 2100, Руководство пользователя

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Remedy:
Follow disassembly and assembly steps outlined
in the Maintenance and Repair Manual on resetting
the radial clearance correctly.
4.1.12 Possible Cause
Internal parts worn or damaged.
Remedy:
Follow disassembly and assembly steps outlined
in the Maintenance and Repair Manual and replace
worn or damaged parts.
4.1.13 Possible Cause on RC Models Only
The oil return line (Ref. 290) is connected
directly to atmospheric pressure in the exhaust area.
On small model pumps, a fairly large amount of air
is sucked through the oil return line, and it may not
be possible to reach 15 torr or 29.4 inches Hg.
blank-off on the inlet of the pump under these con-
ditions.
Blank-off of 29.4 inches Hg or 15 torr can be
reached by temporarily disconnecting and closing
the oil return line; also by squirting oil through the
exhaust opening into the exhaust filter area. Oil will
be sucked into the oil return line, and no air will
reach the inlet, thus affecting the "blank-off' pres-
sure.
4.2 Trouble
Pump will not start.
4.2.1 Possible Cause
Motor does not have proper supply voltage or is
overloaded; motor starter overload settings are too
low or wrong setting; fuses are burned; or wire is
too small or too long, causing a voltage drop at the
pump.
Remedy:
Check correct supply voltage; check overload
settings in motor starter for size and setting accord-
ing to motor nameplate data; check fuses; and install
proper size wire. If ambient temperature is high, use
larger size overloads or adjust setting 5% above
nominal motor nameplate value.
4.2.2 Possible Cause
Pump or motor is blocked.
Remedy:
Remove fan cover and try to turn pump and
motor by hand. If frozen, remove motor from pump
and check motor and pump separately. If pump is
frozen, disassemble completely per the Maintenance
and Repair Manual and remove foreign objects in
the pump or replace broken vanes.
4.3 Trouble
Pump starts, but labors and draws a very high
current.
4.3.1 Possible Cause
Oil too heavy (viscosity too high) or ambient
temperature below 5 degrees C (41 ° F).
Remedy:
Change to R580 vacuum oil if very cold, or
warm up oil before filling.
4.3.2 Possible Cause
Pump runs in the wrong direction.
Remedy:
Check for correct rotation which is counter-
clockwise when looking at the motor from the
motor's fan side.
4.3.3 Possible Cause
Pump is overfilled with oil or the wrong kind of
oil is used.
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