S0405500
Page 4
Fuel Transfer Pump
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TROUBLESHOOTING
On some pumps the ON-OFF switch is installed separately at a remote location.
A thermal limiter, built into the motor, will automatically shut off power if motor is overheating to protect it
from damage.
NOTE:
OPEN TEMP: 150 ±5°C (302 ±41°F). After circuit is automatically shut off due to
overheating the pump will stop running. When temperature drops below 143˚C (289˚F) the
circuit will reactivate allowing the pump to restart.
Check resistance at connectors "A." If reading is zero, or very close to zero, the motor is bad and must be
replaced.
On units equipped with a toggle switch, check the resistance through the toggle switch, while the switch is
in the "ON" position. If continuity is not present, the switch is bad. Be sure to check resistance through the
motor.
REPLACEMENT OF ROTOR AND VANE
If dirt or other foreign materials enter pump
during operation, it can become lodged between
the rotor and/or vanes and generate heat which
can cause pump damage.
Remove the pump cover and check the rotor
and vane. If any pump parts or components
become lost, damaged or inoperable,
immediately replace them with a new ones.
Figure 3 WITH TOGGLE SWITCH Figure 4 WITHOUT TOGGLE SWITCH
Figure 5 WITHOUT TOGGLE SWITCH
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