THRUSH AIRCRAFT, INC – MODEL S2R R1340
AIRCRAFT MAINTENANCE MANUAL
Effective: 01/01/08
5-7
FIGURE 5-3: R1340 FUEL QUANTITY GAUGE
AUXILIARY FUEL PUMP
The electrically powered auxiliary fuel
pump is installed under the left side of
the aircraft cockpit aft of the fuel header
tank. A two-position switch labeled AUX
FUEL PUMP on the start panel controls
this pump. The pump is a positive
displacement vane type with a balanced-
type relief valve, and provides a fuel
pressure of 6 ± 1psi. This pump provides
positive fuel pressure for engine starting
and may be used for continuous engine
operation in the event of engine-driven
fuel pump failure. Maintenance and
disassembly of this pump is not
authorized. Therefore, the servicing is
limited to the removal and replacement
of the pump.
Auxiliary Fuel Pump Removal
A. Close fuel shutoff valve. Remove
drain plug and drain the aux pump.
B. Disconnect electrical connector from
pump motor.
C. Remove hoses from pump and cap
hoses.
D.
Remove attaching hardware and
remove pump assembly from
support bracket.
Auxiliary Fuel Pump Installation
A. Install pump to support brackets and
tighten hardware.
B. Connect hoses to pump. Be sure
inlet and outlet hoses are connected
correctly.
C. Open fuel shutoff valve.
D. Connect electrical connector to pump
motor.
E. Operate fuel pump and check for fuel
leaks at lines and fittings.
FUEL STRAINER
The main fuel filter is installed on the
forward left side of the firewall. The fuel
strainer in the filter should be removed,
inspected and cleaned every 100 hours
of operation or sooner if improper fuel
circulation is suspected. (See Figure 5-
1)
