VALMETAL H Series, Operator'S Manual And Parts Book

Page: 51 / 86

7.3 HYDRAULIC FITTING TORQUE
TIGHTENING FLARE TYPE TUBE FITTING*
1. Check flare and flare seat for defects that
might cause leakage.
2. Align tube with fitting before tightening.
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.
Recommended
Nut Size Turns to Tighten
Tube Across (After Finger
Size Flats Torque Value* Tightening)
OD
(in.) (in.) (N.m) (lb-ft) (Flats) (Turns)
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
SPECIFICATIONS
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