28-30 Fuel Valve
Refer to R66 Illustrated Parts Catalog (IPC) Figure 28-5.
A. Removal
1. Defuel helicopter per Section 12-42.
2. Refer to Figures 28-2 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 28-2 and 28-4. Install F670-1 fuel valve and install screws and washers
securing valve to F233-1 firewall. Verify security.
2. Remove caps and connect D205-21 and B283-12 hose assemblies to fuel valve. Special
torque B-nuts per Section 20-33 and torque stripe per Figure 5-1.
3. Perform fuel valve control rigging per Section 28-31.
4. Perform fuel flow check per Section 28-40.
28-31 Fuel Valve Control Rigging
Refer to R66 Illustrated Parts Catalog (IPC) Figure 28-5.
1. Refer to Figures 28-2 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-0.25 inch at or beyond edge of outboard clamp and install fasteners. Verify
security.
3. Refer to detail in Figure 76-3. Push fuel valve knob ON then pull up slightly to create
0.03-0.10 clearance under knob. Position fuel valve arm in full open detent. Verify
sufficient inner wire beyond outboard edge of fitting and special torque fitting nut per
Section 20-33.
4. Pull fuel valve knob OFF and verify valve arm fully contacts OFF detent. Push fuel
valve knob ON and verify valve arm fully contacts ON detent, and meets clearance
requirement. Reposition fitting per previous steps, as required.
5. Install fitting palnut, standard torque per Section 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.
25 OCT 2010 R66 Maintenance Manual Chapter 28 Fuel System Page 28.11
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