Crary PRO - Hydraulic Fitting Torque

Stringer Trailer Owner’s/Parts Manual
31
PN:90806-00 R090114
SPECIFICATIONS
TIGHTENING FLARE TYPE TUBE FITTINGS *
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.
FLARE TYPE TUBE FITTINGS
TUBE SIZE
O.D
NUT SIZE
ACROSS
FLATS
TORQUE
VALUE *
RECOMMENDED TURNS
TO TIGHTEN
(AFTER FINGER TIGHTENING)
(in.) (in.) (N.m) (Ft-lb.) (Flats) (Turn)
1/5 2/5 8 6 1 1/6
1/4 4/7 12 9 1 1/6
1/3 5/8 16 12 1 1/6
3/8 2/3 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
* The torque values shown are based on lubricated connections as in
reassembly
TIGHTENING O-RING FITTINGS *
1. Inspect O-ring and seat for dirt or obvious de-
fects.
2. On angle fittings, back the center locknut 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.
O-RING FITTINGS
TUBE SIZE
O.D
NUT SIZE
ACROSS
FLATS
TORQUE
VALUE *
RECOMMENDED TURNS
TO TIGHTEN
(AFTER FINGER TIGHTENING)
(in.) (in.) (N.m) (Ft-lb.) (Flats) (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
1-7/8 2-1/8 217 160 1/2 1/12
* The torque values shown are based on lubricated connections as in
reassembly
8.2 HYDRAULIC FITTING TORQUE