Hydraulic Fittings - MacDon M150 Assembly Instructions Manual

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
TORQUE
SIZE
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 # 169018
NUT
BODY
RECOMMENDED
TURNS TO
TIGHTEN
VALUE*
(AFTER FINGER
TIGHTENING)
N·m Flats Turns
8 1 1/6
12 1 1/6
16 1 1/6
24 1 1/6
46 1 1/6
62 1 1/6
102 3/4 1/8
122 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
SIZE
FLATS
(in.)
(in.)
3/8 1/2
7/16 9/16
1/2 5/8
9/16 11/16
3/4 7/8
7/8 1
1-1/16 1-1/4
1-3/16 1-3/8
1-5/16 1-1/2
1-5/8 1-7/8
1-7/8 2-1/8
* The torque values shown are based on lubricated connections
as in reassembly.
5
LOCKNUT
WASHER
O-RING
GROOVE
RECOMMENDED
TURNS TO
TORQUE
TIGHTEN (AFTER
VALUE*
FINGER
TIGHTENING)
lbf·ft N·m Flats
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
Model Year - 2009
C
Turns
1/3
1/3
1/3
1/3
1/3
1/4
1/6
1/6
1/8
1/8
1/12