Motor Protector - Great Plains Industries M-150S Guía De Operaciónes

Make sure all threaded fuel connections are wrapped with
three to four turns of Teflon
approved for use with petroleum fuels.
Tighten the bung adapter snugly onto the tank. Place the
union ring gasket into the inlet fitting. Thread the suction
pipe into the inlet fitting and tighten snugly.
Clean the tank interior of all dirt and debris. Extend the suc-
tion pipe to its full length and insert it into the tank opening.
(Figure 1) The suction pipe will adjust to rest on the tank
bottom. Place the pump on the bung adapter and tighten
the union ring with a pipe wrench. Make sure the union ring
is not cross-threaded. Make sure the tank is vented. A vent
cap rated at 3 psi or less is recommended.
Install Electrical Connections
Connect 12-volt pumps to a 12-volt battery. Connect 24-
volt pumps to a 24-volt battery. Do not attempt connection
to a 115-volt or 230-volt power source.
To install the power cord, remove the electrical coverplate.
(Figure 2) Trim the power cord to the desired length. Strip
7.5 to 10 cm of outer insulation from the power cord. For the
M-240S, this is the end without the fuse. Then strip 1.3 cm
of insulation from the red and black wires. Slide the strain
relief grip onto the power cord so that the threaded end of
the strain relief grip faces the stripped power cord wires.
(Figure 3) Insert the power cord through the inlet on the back
of the pump. Using wire nuts, connect black wire to black
and red wire to red in the pump's electrical cavity. Position
the wires inside the electrical cavity and tighten the strain
relief grip securely. (Figure 4) Make sure mating surfaces are
clean, install electrical coverplate, and tighten screws se-
curely.
NOTE: By following the instructions above, the system is
wired for negative ground. If you require positive grounding
(24-volt systems), remove the fuse and fuse holder from
the power cord's red wire and splice it to the black wire.
Attach the black power cord wire to the negative (–) ter-
minal of the battery. Attach the red power cord wire to the
positive (+) terminal. Reverse connections for positive
grounded systems.
Install Hose and Nozzle
After sealing threads, tighten the hose into the pump outlet
and the nozzle on the hose. The nozzle can be placed in the
nozzle holder only when the pump is off. When in the nozzle
holder, the nozzle can be locked in place.
OPERATIONS
Always follow safety precautions when operating this equip-
ment. Review the Safety Instructions above. Before each
use, repair leaks around seals or connections. Make sure
hoses are in good condition and connections are tight. Make
sure the work area is dry. Make sure the pump is properly
grounded. Repair any corroded or damaged wiring before
use. Ensure the tank contains enough fuel. Make sure the
fuel is not contaminated with debris. Tighten loose tank lids
regularly.
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tape or pipe thread sealant
To Dispense Fuel
Turn the pump on by removing the nozzle from the holder
and push the switch lever up. Insert the nozzle into the re-
ceiving tank and squeeze the handle to start fuel flow. After
dispensing fuel, release the nozzle handle, turn the pump
off, and return the nozzle to its holder.
This pump is designed to be self-priming. If fuel is not deliv-
ered within 15 to 20 seconds, turn the pump off. Refer to
priming information given above. An automatic bypass valve
prevents pressure build up when the pump is on with the
nozzle closed. To avoid pump damage, do not run the pump
more than 10 minutes with the nozzle closed. After running
the pump for a maximum of 30 minutes, allow it to cool for
30 minutes.

Motor Protector

(Models M-150S and M-180S only)
The motor protector trips automatically. This feature pro-
vides added protection against motor damage and must be
reset manually.
When the motor protector trips, reset by turning the switch
to OFF. Let the pump cool then turn ON again. If the motor
protector trips again, see the Troubleshooting Section of this
manual.
Motor Protector
(M-240S model)
An inline fuse provides Overload Protection on the 24-volt
models. Follow the instructions in the Repair Section to re-
place the fuse.
MAINTENANCE
Clean the inlet strainer after every 40 hours of operation or if
low flow occurs.
To Clean or Replace Strainer
Turn the pump off and disconnect from power. Remove the
strainer coverplate. (Figure 5) Remove the inlet strainer and
inspect for damage or clogs. Clean the strainer with a soft-
bristled brush and solvent. If the strainer is very dirty, com-
pressed air may be used. If damaged, replace the strainer.
NOTE: A very dirty strainer can indicate a contaminated
fuel tank. Clean the tank as necessary.
Clean the coverplate and O-ring. Coat the O-ring lightly with
grease. Place the strainer in the cavity. Ensure the coverplate
O-ring is properly seated and tighten the strainer coverplate.
TROUBLESHOOTING
A. MOTOR DOES NOT RUN
1. Fuse blown. Inspect fuse in fuse holder on power
cord for Model M-240S. If blown, replace fuse.
2. Switch defective. Remove switch coverplate and in-
spect switch. Replace if necessary.
3. Motor burned out. Inspect and replace as neces-
sary.