Timberline Binar-5B-Compact - Replacement of the Fuel Pump

17
5.8 Purpose, Troubleshooting, Dismounting, and Replacement
of the Fuel Pump
5.8.1
The fuel pump (Fig. 11) is used
for metered fuel supply to the
combustion chamber.
Main characteristics of the fuel pump:
• Rated supply voltage 12 V,
• Coil resistance 6.0 Ω.
Possible pre-heater fuel pump faults:
• Fuel is not supplied to the fuel
pipe of the heater during launch,
and a characteristic knocking
noise from the fuel pump
is absent
• The fuel pump operates, but no
fuel is supplied to the fuel pipe of
the pre-heater
• Combustion stops when the
pre-heater is switched to the
“max.” operation mode, which
means the fuel pump does not
provide the required capacity
5.8.2
To repair faults and determine the
capacity of the fuel pump:
• Before troubleshooting, rst check
the presence and quality of fuel in
the tank
• Check the condition of the wiring
and connectors
• Check whether the fuel pump
launches when the pre-heater is
launched and emits the charac-
teristic noise of the piston moving
inside the pump
• Check the seal of the fuel line over
its entire length from the tank to
the fuel pump and from the fuel
pump to the heater
You may dismount the fuel pump and
shake it to release the piston jammed
inside the pump after long storage
or failure to observe the preventive
maintenance specied in the
operating manual.
Fig. 11. Fuel pump