Hydraulic Fittings - MacDon A30-S Unloading And Assembly Instructions

D. HYDRAULIC FITTINGS
FLARE TYPE
FLARE
FLARESEAT
a. Check flare and flare seat for defects that might
cause leakage.
b. Align tube with fitting before tightening.
c. Lubricate connection, and hand-tighten swivel
nut until snug.
d. 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.
NUT
TUBE
SIZE
THD
SIZE
SAE
ACROSS
SIZE
O.D.
NO.
FLATS
(in.)
(in.)
(in.)
3 3/16 3/8 7/16
4 1/4 7/16 9/16
1/2
5 5/16 5/8
6 3/8 9/16 11/16
8 1/2 3/4 7/8
10 5/8 7/8 1
12 3/4 1-1/16 1-1/4
14 7/8 1-3/16 1-3/8
16 1 1-5/16 1-1/2
* Torque values shown are based on lubricated connections as in
re-assembly.
169078
GENERAL
NUT
BODY
RECOMMENDED
TURNS TO
TORQUE
TIGHTEN
VALUE*
(AFTER FINGER
TIGHTENING)
ft·lbf N·m Flats Turns
6 8 1 1/6
9 12 1 1/6
12 16 1 1/6
18 24 1 1/6
34 46 1 1/6
46 62 1 1/6
75 102 3/4 1/8
90 122 3/4 1/8
105 142 3/4 1/8
O-RING TYPE
FITTING
SEAT
a. Inspect O-ring and seat for dirt or obvious
defects.
A
B
b. On angle fittings, back off the lock nut until
washer (A) bottoms out at top of groove (B) in
fitting.
c. Hand-tighten fitting until back up washer (A) or
washer face (if straight fitting) bottoms on part
face (C), and O-ring is seated.
d. Position angle fittings by unscrewing no more
than one turn.
e. Tighten straight fittings to torque shown.
f. Tighten angle fittings to torque shown in the
following table, while holding body of fitting with
a wrench.
NUT SIZE
THD
ACROSS
SAE
SIZE
FLATS
NO.
(in.)
(in.)
3 3/8 1/2
4 7/16 9/16
5 1/2 5/8
6 9/16 11/16
8 3/4 7/8
10 7/8 1
12 1-1/16 1-1/4
14 1-3/16 1-3/8
16 1-5/16 1-1/2
20 1-5/8 1-7/8
24 1-7/8 2-1/8
* Torque values shown are based on lubricated connections as in
re-assembly.
5
LOCKNUT
WASHER
O-RING
GROOVE
RECOMMENDED
TORQUE
TURNS TO TIGHTEN
VALUE*
(AFTER FINGER
TIGHTENING)
ft·lbf N·m Flats Turns
6 8 2
9 12 2
12 16 2
18 24 2
34 46 2
46 62 1-1/2
75 102 1
90 122 1
105 142 3/4
140 190 3/4
160 217 1/2 1/12
Revision E
C
1/3
1/3
1/3
1/3
1/3
1/4
1/6
1/6
1/8
1/8