Tightening o-ring fittings – Wheatheart Post Pounder User Manual
Page 41
W
HEATHEART
- P
OST
P
OUNDER
9. A
PPENDIX
H
IGH
& H
EAVY
H
ITTER
AND
H
IGH
& H
EAVY
H
ITTER
P
LUS
9.2. T
IGHTENING
O-R
ING
F
ITTINGS
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.