1-80 Assembly Instructions for R66 Helicopter Crated for Export (continued)
10. For air-conditioned ships:
a. Refer to Figure 1-1. Remove shipping supports (ty-raps, foam, tape, etc.) from G777-
1 compressor assembly. Install hardware securing G782-1 mount weldment to main
rotor gearbox. Standard torque hardware per § 20-32 and torque stripe per Figure
5-1. Hook B774-3 spring in drilled hole of NAS1352-4H14 screw. Verify security.
b. Refer to Figures 1-1 and 1-2. Verify B173-5 v-belt is in good condition. Fit belt around
G779-1 pulley and compressor pulley, and install hardware securing compressor to
G782-1 mount weldment. Standard torque bolts per § 20-32.
c. Refer to Figure 1-2. Install hardware securing compressor to G781-1 arm weldment.
Rotate compressor up and outboard to tension belt, then tighten hardware securing
compressor to weldment. Verify belt is properly aligned on both pulleys. Adjust belt
tension until 4.5-5.5 lb of force applied mid-span deflects belt 0.16-inch. Standard
torque bolts per § 20-32.
d. Connect compressor assembly wiring to airframe harness at connectors and install
ty-raps as required. Cinch ty-raps until snug without over-tightening, and trim tips
flush with heads.
11. Refer to IPC Figure 79-1. Remove F237-1 tailcone frame weldment and F305-5 (aft)
inlet. Install tail rotor drive fan shaft (fanwheel installed) through scroll assembly. Install
hardware securing aft inlet to scroll assembly. Verify security.
12. Refer to IPC Figure 65-1. Install hardware securing C947-3 plate assembly to F908-1
yoke and tail rotor drive fan shaft. Standard torque bolts and palnuts per § 20-32 and
torque stripe per Figure 5-1.
13. Remove shipping supports (ty-raps, foam, tape, etc.) from tailcone assembly, and install
tailcone per Section 53-40 steps 1 thru 7. Install strobe light. Install communication and
GPS antennas (if equipped).
14.
Install empennage assembly per § 53-50. Install aux stabilizer assembly per § 53-52.
15.
Service tail rotor gearbox per § 12-21. Service main rotor gearbox per § 12-11.
16. Remove hydraulic reservoir shipping plug. Install D487-3 vent assembly, special torque
vent to 100 in.-lb, and torque stripe per § Figure 5-1 (do not safety wire).
17.
Install tail rotor assembly per § 64-10. Match color-coded markings on blades with pitch
links.
18.
Install main rotor blades per § 62-10. Match color-coded markings on blades with
markings on hub and pitch links.
19. Inside engine compartment, remove anti-ice valve cap, starter-generator cap, inducer
bleed hose cover, exhaust pipe cover and desiccant, and combustion case drain valve
cap. Connect inducer bleed hose to box assembly and tighten clamp. Verify security.
MAY 2015 Chapter 1 General Page 1.7
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