65
7.3 HYDRAULIC FITTING TORQUE
Tightening Flare Type Tube Fittings
*
1. Check fl are and fl are seat for defects
that might cause leakage.
2. Align tube with fi tting before tighten-
ing.
3. Lubricate connection and hand
tighten swivel nut until snug.
4. To prevent twisting the tube(s), use
two wrenches. Place one wrench
on the connector 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 Recommened
Size Across Value• Turns To Tighten
OD Flats (After Finger
Tightening)
(in.) (in.) (N.m) (lb-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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