Robinson R66 - Page 249

20-33 Special Torques
Special torques supersede standard torques listed in § 20-32.
NOTE
1. Torque values are in inch-pounds unless otherwise specified.
2. Torque values include nut self-locking torque.
3. Increase torque values 10% if torqued at bolt head.
4. Wet indicates threads lubricated with A257-9 anti-seize.
5. For elbow and tee fittings which require alignment, torque to indicated
value, then tighten to desired position.
6. Tolerance is ± 10% unless range is specified.
7. Unless otherwise specified, thread sizes 8-32 and smaller are not used for
primary structure and do not require control of torques.
AREA FASTENER
TORQUE
(IN.-LB)
AIR CONDITIONING
(OPTIONAL
EQUIPMENT)
(1) D795-8 line assembly, B-nuts 150
(1) D799-2 switch assembly 90
(1) D799-3 switch assembly 90
(1) D799-9 switch assembly 90
(1) G783 condenser, dessicant cap 100
(1) G784-1 evaporator assembly, inlet B-nut to TXV 210
(1) G794-1 hose assembly, B-nuts 210
(1) G794-2 hose assembly, B-nuts 210
(1) G794-3 hose assembly, B-nuts 150
(1) G810-1 line assembly, B-nuts 210
(1) G811-1 line assembly, B-nuts 150
(2) AN924-8D nuts 360
(8) MS27039C1-07 screws at condenser fans 30
(2) 91292A135 screws 70
CABIN (1) D210-5 nut, ground handling ball 240
COOLING SYSTEM
(ENGINE AND MAIN
ROTOR GEARBOX
OILS)
(1) B289-2 bolt, drain 70
(1) B563-2 sight gage 150
(1) D205-19 hose assembly, B-nuts 285
(1) D205-20 hose assembly, B-nuts 285
(1) F723-1 line assembly, B-nuts 675
(1) F723-2 line assembly, B-nuts 245
(1) F723-3 line assembly, B-nuts 245
(1) F723-4 line assembly, B-nuts 245
(1) F724-1 line assembly, B-nuts 120
(1) F724-2 line assembly, B-nuts 285
(1) F724-3 line assembly, B-nuts 285
(2) AN815-8D unions, on F649-1 oil cooler 300
(2) AN832-8D unions, at firewall 230-260
JUL 2020 Chapter 20 Standard Practices Page 20.7