User guide

WHEATHEART - POST POUNDER 9. APPENDIX
HIGH & HEAVY HITTER AND HIGH & HEAVY HITTER PLUS 9.2. TIGHTENING O-RING FITTINGS
IM4 R3 41
9.2. TIGHTENING O-RING FITTINGS
1. Inspect o-ring and seat for dirt or obvious defects.
2. On the angle fittings, back the lock nut off until washer bottoms out at top of
groove.
3. Hand-tighten fitting until back up washer or washer face (if straight fitting)
bottoms on face and o-ring is seated.
4. Position angle fittings by unscrewing no more than one turn.
5. Tighten straight fittings to torque shown.
6. Tighten while holding body of fitting with a wrench.
Table 9.3 O-Ring Fittings
Tube Size
OD (in.)
Nut Size
Across Flats
(in.)
Torque
Values
a
(Nm)
Torque
Values
a
(Lb-ft)
# of Turns
to Tighten
(Flats)
(After Finger
Tightening)
(Turn)
3/8 1/2 8 6 2 1/3
7/16 9/16 12 9 2 1/3
1/2 5/8 16 12 2 1/3
9/16 11/16 24 18 2 1/3
3/4 7/8 46 34 2 1/3
7/8 1 62 46 1-1/2 1/4
1-1/16 1-1/4 102 75 1 1/6
1-3/16 1-3/8 122 90 1 1/6
1-5/16 1-1/2 142 105 3/4 1/8
1-5/8 1-7/8 190 140 3/4 1/8
7/8 2-1/8 217 160 1/2 1/12
a. The torque values shown are based on lubricated connections as in reassemble.