MacDon M 2009 Series, Assembly Instructions Manual

Page: 10 / 117

Form 169542
10
Revision F
F. O-RING FACE SEAL (ORFS)
HYDRAULIC FITTINGS
* Torque values and angles sho wn are based on lubricated
connection, as in re-assembly.
** Alw ays default to the torque value for evalu ation of adequat e
torque
*** O-ring face seal type end not defined for this tube size.
a. Check components to en sure that the sealin g
surfaces and fitting threads are free of burrs,
nicks, and scratches, or any foreign material.
b. Apply lubricant (typically Petroleum Jelly) to
O-ring and threads. If O -ring is not already
installed, install O-ring.
c. Align the tube or hose assembly. Ensure that flat
face of the m ating flange comes in full contact
with O-ring.
d. Thread tube or hose nut until hand-tight. The nut
should turn freely until it is bottomed out. Torque
fitting further to the specified number of F.F.F.T
(“Flats From Finger Tight”), or to a given torque
value in the table shown in the opposite column.
NOTE
If available, always hold the hex on the
fitting body to prevent unwanted
rotation of fitting body and hose when
tightening the fitting nut.
e. When assembling unions or two hoses together,
three wrenches will be required.
SAE
NO.
THD
SIZE
(in.)
TUBE
O.D.
(in.)
TORQUE VALUE*
RECOMMENDED
TURNS TO
TIGHTEN
(AFTER FINGER
TIGHTENING)**
ft·lbf N·m
Tube
Nuts
Swivel &
Hose
3 *** 3/16 --- --- --- ---
4 9/16 1/4 11–12 14–16 1/4 -1/2 1/2–3/4
5 *** 5/16 --- --- --- ---
6 11/16 3/8 18–20 24–27
1/4
–
1/2
1/2
–
3/4
8 13/16 1/2 32–35 43–47
10 1 5/8 45–51 60–68
12
1-3/16
3/4
67–71 90–95
1/3
–
1/2
14 7/8
16 1-7/16 1 93–100 125–135
20 1-11/16 1-1/4 126–141 170–190
24 2 1-1/2 148–167 200–225
32 2-1/2 2 --- --- --- ---