GMC 4000 Series Service Manual page 105

Sec. 1
Page 98
AIR CONDITIONING
OUTSIDE DIAMETER
OF METAL TUBING
(INCHES)
1/4
3/8
1/2
5/8
3/4
NOTE: Steel torques to be used only when tube is mated steel-to -steel. If steel
connection is made to aluminum or copper tube fittings, use appropriate "ALUM­
INUM OR COPPER" torque specifications.
G M C S E R V I C E M A N U A L
REFRIGERANT LINE CONNECTIONS
TORQUE SPECIFICATIONS
TORQUE FT.-LBS.
(STEEL)
10 - 15
30 - 35
30 - 35
30 - 35
30 - 35
TORQUE FT.-LBS.
ALUMINUM OR COPPER
5 - 7
11 - 13
15 - 20
21 - 27
28 - 33