28-30 Fuel Valve
A. Removal
1. Defuel helicopter per § 12-42.
2. Refer to Figures 28-1 and 28-4. Open sump drain access door. Remove palnut
and loosen nut securing A462-4 fitting and A522-11 (fuel valve) control inner wire
to F670-1 fuel valve arm.
3. Disconnect D205-21 and B283-12 hose assemblies from fuel valve and cap fittings.
4. Remove screws and washers securing fuel valve to F233-1 firewall and remove
fuel valve through sump drain access door.
B. Installation
1. Refer to Figures 28-1 and 28-4. Install screws and washers securing F670-1 fuel
valve to F233-1 firewall. Verify security.
2. Remove caps and connect D205-21 and B283-12 hose assemblies to fuel valve.
Special torque hose nuts per § 20-33 and torque stripe per Figure 5-1.
3. Perform fuel valve control rigging per § 28-31.
4. Perform fuel flow check per § 28-40.
28-31 Fuel Valve Control Rigging
1. Refer to Figures 28-1 and 28-4. Open sump drain access door. Remove palnut and
loosen nut securing A462-4 fitting and A522-11 (fuel valve) control inner wire to
F670-1 fuel valve arm.
2. Open baggage compartment door. As required, loosen hardware securing AN742-3
clamps and control housing to G915-3 bracket. Position end of control housing flush
to 0.25 inch at or beyond edge of G244-1 panel and install fasteners. Verify security.
3. Refer to detail in Figure 76-3. Push fuel valve into on position then pull up slightly to
create 0.03-0.10 clearance under control knob. Position fuel valve arm in full open
detent. Verify sufficient inner wire beyond outboard edge of fitting and special torque
fitting nut per § 20-33.
4. Pull fuel valve into off position and verify valve arm fully contacts OFF detent. Push
fuel valve into on position and verify valve arm fully contacts ON detent, meeting
clearance requirement. Reposition fitting per previous steps, as required.
5. Install fitting palnut, standard torque per § 20-32, and torque stripe per Figure 5-1.
Trim control wire 0.10-0.30 inch beyond aft edge of fitting.
6. Close sump drain access door. Close and latch baggage compartment door.
APR 2017 Chapter 28 Fuel System Page 28.13
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