19
Operator’s Manual
1808
022016 ENG
09
TROUBLESHOOTING
STARTING TROUBLES OR
STALLING
Pump starting troubles or stalling may be due
to loose or broken belts, lack of lubrication,
obstruction inside the pump, temperature too low,
the pump fl ooded with oil, locked drive bearing, or
lack of electrical power. If the problem is loose or
broken belts, see
V -B elt s on page 14
. If stalling
is due to insuffi cient lubrication, this can be due to
blocked oil lines, malfunction of the solenoid valve,
or low oil level. f the oil supply is depleted, it is
probably caused by a ruptured oil line. If the pump
is not free to turn by hand, dismantle it to remove
the obstruction. f the pump is fl ooded, turn the
pump over by hand before energi ing to force the
oil out into the separator. If the pump is too cold
to start, use an immersion heater in the oil, or live
steam on the exterior of the pump, until the oil is
warmed to a temperature of 40°F (4°C) minimum.
If there is no electrical power to the motor, check
the fuses or relays for signs of overloading.
CHECKING PUMP PERFORMANCE
If the processing time increases or the ultimate
pressure becomes poor with no recent changes
in the process or in system confi guration, test the
pump to determine if the trouble is in the pump
or the connected process equipment. To check
the condition of the pump, measure the blank-off
pressure using a c eod gauge and, if available,
take a thermistor or thermocouple gauge reading.
See
Table 9 -1 on page 23
for a listing of
common symptoms in the system.
Average blank-off readings are to microns
with a McLeod gauge and 10 to 100 microns with a
thermocouple gauge. The specifi cation pressure is
10 microns (10 x 10 3 Torr) McLeod gauge reading.
To obtain a blank-off reading, isolate the pump
from the process equipment. onnect a vacuum
gauge to the pump side of the isolation valve (
s ee
Figure 5 -2 on page 10
) and operate the pump
to allow it to attain the lowest pressure.
If the McLeod gauge reading is low and the
thermocouple gauge reading is high, the pump
oil is contaminated. Change the oil and check
the blank-off pressure again. Additional oil
changes may be necessary to fl ush all traces of
contamination from the pump. After eliminating oil
contamination as a possible cause of poor pump
performance, recheck the blank-off pressure.
If both the McLeod and thermocouple gauge
readings are high, this indicates that the pump is
leaking. Proceed as directed in
P um p L eak s on
page 20
.
Summary of Contents for KINNEY KD Series
Page 39: ......