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7
C-4.2) Overload Protection:
Single Phase - The type of in-winding overload protector
used is referred to as an inherent overheating protector
and operates on the combined effect of temperature and
current. This means that the overload protector will trip
out and shut the pump off if the windings become too hot,
or the load current passing through them becomes too
high. It will then automatically reset and start the pump up
after the motor cools to a safe temperature. In the event
of an overload, the source of this condition should be
determined and rectifi ed immediately. DO NOT LET THE
PUMP CYCLE OR RUN IF AN OVERLOAD CONDITION
OCCURS !
If current through the temperature sensor exceeds the
values listed, an intermediate control circuit relay must
be used to reduce the current or the sensor will not work
properly.
TEMPERATURE SENSOR ELECTRICAL RATINGS
Volts Continuous
Amperes
Inrush
Amperes
110-120 3.00 30.0
C-4.3) Wire Size:
Consult a qualifi ed electrician for proper wire size. See
table for electrical information.
SECTION D: SERVICE AND REPAIR
NOTE: All item numbers ( ) refer to Figure 8.
D-1) Lubrication:
Anytime the pump is removed from operation, the cooling
oil in the motor housing must be checked visually for oil
level and contamination.
D-1.1) Checking Oil:
To check oil, set unit upright. Remove pipe plug. With a
fl ashlight, visually inspect the oil in the motor housing to
make sure it is clean, clear and that the oil level is above
all internal componentry. If oil appears satisfactory, replace
pipe plug. If oil is low or appears contaminated, test oil as
per section D-1.2
D-1.2) Testing Oil:
1. Place pump on its side, remove pipe plug and drain oil
into clean, dry container.
2. Check oil for contamination using an oil tester with a
range to 30 kilovolts breakdown.
3. If oil is found to be clean and uncontaminated
(measures above 15 kilovolts breakdown), refi ll the
motor housing with oil.
4. If oil is found to be dirty or contaminated (measures
below 15 kilovolts breakdown), then the pump must be
carefully inspected for leaks at the shaft seal (1), cord
inlet (2) , square ring and pipe plug before refi lling with
oil.
D-1.3 Replacing Oil in Motor Housing:
Drain all oil from motor housing and dispose of properly.
Refi ll with 32 ounces of new cooling oil as per Table 1. An
air space must remain in the top of the motor housing to
compensate for air expansion. Set unit upright and fi ll only
until oil level from top of pipe plug boss is 3” ± 1/4”.
WARNING ! - DO NOT overfi ll oil. Overfi lling of
motor housing with oil can create excessive
and dangerous hydraulic pressure which
can destroy the pump and create a hazard.
Overfi lling oil voids warranty.
TABLE 1 - COOLING OIL - Dielectric
Bushing
Bearing
Motor Housing
Seal Assembly
Retaining Ring (1a)
Stationary (1d)
Polished Mating Surface
Rotating Member (1c)
Spring (1b)
MOTOR END
(Inboard End)
PUMP END
(Outboard End)
FIGURE 4
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