MacDon A30-D Unloading And Assembly Instructions page 9

O-RING FACE SEAL (ORFS) HYDRAULIC
FITTINGS
Brazed sleeve
Nut
Thd Tube
SAE
size O.D.
no.
(in.) (in.)
3 *** 3/16
4 9/16 1/4
5 *** 5/16
6 11/16 3/8
8 13/16 1/2
10 1 5/8
12 1-3/16 3/4
14 1-3/16 7/8
16 1-7/16 1
20 1-11/16 1-1/4
24 2 1-1/2
32 2-1/2 2
* Torque values and angles shown are based on lubricated
connection, as in reassembly.
** Always default to the torque value for evaluation of adequate
torque.
*** O-ring face seal type end not defined for this tube size.
169001
RECOMMENDED TORQUES
O-ring
Fitting body
Recommended
turns to tighten
Torque value*
(after finger
tightening)**
Tube
ft·lbf N·m
Nuts
--- --- ---
11–12 14–16 1/4–1/2
--- --- ---
18–20 24–27
32–35 43–47
45–51 60–68
67–71 90–95
1/4–1/2
67–71 90–95
93–100 125–135
126–141 170–190
148–167 200–225
--- --- ---
a. Check components to ensure that the sealing
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. Align the tube or hose
assembly.
c. Ensure that flat face of the mating 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.
Two piece
sleeve
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.
Swivel
& hose
---
1/2–3/4
---
1/2–3/4
1/3–1/2
---
7
NOTE
Revision F