Flare Type Hydraulic Fittings; O-Ring Type Hydraulic Fittings - MacDon A30-S Operator's Manual

7.3.1.3

Flare Type Hydraulic Fittings

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.
TUBE NUT SIZE
TORQUE
SIZE ACROSS
O.D. FLATS
(in.) (in.)
lbf∙ft
3/16 7/16 6
1/4 9/16 9
5/16 5/8 12
3/8 11/16 18
1/2 7/8 34
5/8 1 46
3/4 1-1/4 75
7/8 1-3/8 90
* The torque values shown are based on lubricated connections as
in reassembly.
Form # 169000
MAINTENANCE/SERVICE
NUT
BODY
RECOMMENDED
TURNS TO TIGHTEN
VALUE* (AFTER FINGER
TIGHTENING)
N·m Flats Turns
8 1
12 1
16 1
24 1
46 1
62 1
102 3/4
122 3/4
7.3.1.4
a. Inspect O-ring and seat for dirt or obvious defects.
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
1/6
face (C) and O-ring is seated.
1/6
d. Position angle fittings by unscrewing no more than
1/6
one turn.
1/6
e. Tighten straight fittings to torque shown.
1/6
f. Tighten angle fittings to torque shown in the
1/6
following table while holding body of fitting with a
1/8
wrench.
1/8
THD
SIZE
(in.)
3/8
7/16
1/2
9/16
3/4
7/8
1-1/16
1-3/16
1-5/16
1-5/8
1-7/8
* The torque values shown are based on lubricated connections as
in reassembly.
85

O-ring Type Hydraulic Fittings

FITTING
SEAT
A
B
NUT SIZE TORQUE
VALUE*
ACROSS
FLATS
(in.)
lbf∙ft N·m
1/2 6 8
9/16 9 12
5/8 12 16
11/16 18 24
7/8 34 46
1 46 62
1-1/4 75 102
1-3/8 90 122
1-1/2 105 142
1-7/8 140 190
2-1/8 160 217
LOCKNUT
WASHER
O-RING
GROOVE
C
RECOMMENDED
TURNS TO TIGHTEN
(AFTER FINGER
TIGHTENING)
Flats Turns
2 1/3
2 1/3
2 1/3
2 1/3
2 1/3
1-1/2 1/4
1 1/6
1 1/6
3/4 1/8
3/4 1/8
1/2 1/12
Model Year - 2009