Activating Hopper (Ferry) Fuel System - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT INC – MODEL S2RHG-T34 TURBO THRUSH
PROBLEM
No fuel flow
when auxiliary Open or defective
circuit breaker.
pump is turned
on. (Continued)
Loose connections or
open circuit.
Defective auxiliary fuel
pump.
Defective engine-driven
fuel pump by-pass
valve.
Fuel flow
indicator No voltage to indicator.
inoperable.
Indicator comes
Bad wires to transducer
on but will not
or defective transducer.
show fuel flow.
Any time you have to replace either the fuel flow indicator or
the transducer, you must be sure to have unit calibrated to
same K factor as set by manufacturer. It will cause bad
indications if mismatched K factors are installed together.

ACTIVATING HOPPER (FERRY) FUEL SYSTEM

A. Remove spray pump and spray pump discharge line to spray valve. Tie-rap any
wires or cables to upper portion of pump mount.
B. Open hopper gate box dump gate.
C. Assure hopper has been cleaned thoroughly and there is no presence of water or
chemicals.
5-12
AIRCRAFT MAINTENANCE MANUAL
PROBABLE CAUSE
*NOTE
(ref. Fig. 5-3)
REMEDY
Check visually. If not open, check
continuity. Reset. Replace if defective.
Check connections and wiring. Tighten
connections; repair or replace wiring.
Disconnect outlet line. With proper fuel
supply to pump, fuel under pressure
should flow from outlet. Replace
defective pump.
Check pump outlet during starting. See
Section IV and replace fuel pump if by-
pass valve is defective or installed
backwards.
Check voltage and ground wire. If
voltage is present and ground is good,
replace indicator, maintaining the same K
factor.
To check transducer, remove four screws
holding wire housing to flow vane
housing. With battery power on, pass
screwdriver back and forth over wire
housing pickups. You should get a
reading on indicator. If no reading,
replace units.
Effective: 05/05/04