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Page Title:
Fuel Regulator Valve and Nozzle Assembly |
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 flow should be between 27 and 33
installing the coil assembly, connect the
cc/min. at a pressure of 140.15 psi.
wires as indicated in figure 71.7.
Break the circuit and the fuel flow
d.
Fuel Regulator Valve and Nozzle Assembly. If
should stop immediately.
faulty fuel regulator operation is suspected, remove the
(e) If outlet pressures do not conform to
regulator valve and nozzle assembly and test for correct
specification, or fuel flow does not
fuel flow:
stop when the circuit is broken, the
(1) Regulator Valve and Nozzle Assembly
fuel regulator valve is faulty and
Removal.
should be replaced.
(a) Remove the control head assembly
(f) If outlet pressures do conform, but
(para 194b).
the fuel flow is lower than specified
(b) Remove the adapter tee (17, fig.
during tests, the nozzle assembly is
71.28) and the elbow (18) from the
clogged. Clean the passages of the
fuel regulator valve. Remove the
nozzle assembly with compressed
pipe plug (18, fig. 71.31) from the
air only. Do not attempt to clean
adapter tee and unscrew the nozzle
the fuel regulator with any type of
assembly (19) from the tee.
instrument.
(c) Disconnect the wires at the
(g) If outlet pressures do conform, but
terminals of the regulator valve.
fuel flow is higher than specified
Remove the two screws (23, fig.
during tests, replace a faulty
71.28) fastening regulator valve
assembly.
(19) to the control head base (20).
(3) Install Fuel Regulator Valve and Nozzle
(2) Test Regulator Valve and Nozzle
Assembly.
Assembly.
(a) Position the fuel regulator valve (19,
(a) Install a tee with pressure gage in
fig. 71.28) on the control head base
the regulator valve outlet port. To
(20) and fasten with two screws
this tee, install the adapter tee with
(23). Connect wires as shown in
the nozzle assembly. Connect a
wiring diagram (fig. 71.7.)
fuel supply capable of supplying a
(b) Place the nozzle assembly (19, fig.
steady flow of fuel under constant
71.31) in the adapter tee (17, fig.
pressure of 3 to 5 psig to the
71.28) and insert pipe plug (18, fig.
regulator valve inlet port. Connect
71.31).
the fuel tube (15, fig. 71.31) to the
(c) Install the elbow (18, fig. 71.28) and
adapter tee, and make provisions to
the adapter tee on the outlet port of
catch the fuel flow in a measuring
the fuel regulator valve.
graduate (approximately 50-100
ml).
(d) Attach the nut (16, fig. 71.81),
sleeve (17), and fuel tube (15) to
(b) Connect a power supply of proper
the adapter tee. Install the control
voltage to both sides of regulator
head assembly (para 195k).
valve and make provision to
energize one or both sides of the
193. Control Head Assembly (Space Heater)
valve.
a. Removal. Refer to paragraph 192 (above) for
removal procedures.
(c) Operate the test setup to energize
the shut-off valve (nameplate end)
b. Test Regulator Valve and Nozzle Assembly.
of the regulator valve and to supply
(1) Install a tee with the pressure gage in the
fuel to the system. The fuel flow
regulator valve outlet port. To this
should be between 40 and 48 cc/
min. at a pressure of 2 0.2 psi.
Break the circuit and the fuel flow
should stop immediately.
(d) Connect both sides of the regulator
valve to the power supply and note
the fuel flow and pressure. The fuel
AGO 5667A
28
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