46
10.3 HYDRAULIC FITTING TORQUE
Tightening Flare Type Tube Fittings
*
1. Check are and are seat for defects that
might cause leakage.
2. Align tube with tting before tightening.
3. Lubricate connection and hand tighten
swivel nut until snug.
4. To prevent twisting the tubes, use two
wrenches. Place one wrench on the con-
nector body and with the second tighten
the swivel nut to the torque shown.
• The torque values shown are based on
lubricated connections as in
reassembly.
Tube Nut Size Torque Recommended
Size Across Value• Turns To Tighten
OD Flats (After Finger
Tightening)
(in.) (in.) (N•m) (lbf·ft) (Flats) (Turn)
3/16 7/16 8 6 1 1/6
1/4 9/16 12 9 1 1/6
5/16 5/8 16 12 1 1/6
3/8 11/16 24 18 1 1/6
1/2 7/8 46 34 1 1/6
5/8 1 62 46 1 1/6
3/4 1-1/4 102 75 3/4 1/8
7/8 1-3/8 122 90 3/4 1/8
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