Service Valves Diagram; Aluminum Tubing Torque Table - Piper Navajo Chieftain PA-31-350 Service Manual

GAUGE PORT (TYPICAL)
"CRACKED" POSITION
NAVAJO CHIEFTAIN SERVICE MANUAL
417 A
FRONT SEATED POSITION
BACK SEATED POSITION
SERVICE VALVE DETAILS
Figure 14-32. Service Valves
any lines.
g. Use clean, dry refrigerant oil which should be contained in a capped container to reduce the
possibility of the oil absorbing moisture and dirt.
h. Replace O-rings when a connection has been broken. Dip new O-rings in refrigeration oil before
using. Do not over torque connections. Refer to Table XIV-X.
i. To insure a consistent seal on all flared and pipe fittings used on the air conditioning system. seal
the fittings with Loctite refrigerant sealant. Sealant should be applied only to the flare surfaces of the flare
fittings.
j. Torque all flare fitting in accordance with Table XIV-X.
TABLE XIV-X. ALUMINUM TUBING TORQUE
Metal Tube
O.D.
Thread and Fitting
Size
Alum. Tubing
Torque
1/4
3/8
1/2
5/8
3/4
7/16
5/8
3/4
7/8
1-1/16
5-7 ft. Ibs.
11-13 ft. lbs.
15-20 ft. lbs.
21-27 ft. lbs.
28-33 ft. lbs.
Reissued: 9/23/80
4 G20
ACCESSORIES AND UTILITIES