MacDon HC10 for D-Series User Manual
Page 31
2.
Apply hydraulic system oil to the O-ring.
3.
Align the tube or hose assembly. Ensure that flat face
of the mating flange comes in full contact with O-ring.
4.
Thread tube or hose nut until hand-tight.
The nut
should turn freely until it is bottomed out.
5.
Torque fitting further to a given torque value in table
2.12 O-Ring Face Seal (ORFS) Hydraulic Fittings,
page 23
NOTE: If applicable, always hold the hex on the
fitting body to prevent unwanted rotation
of fitting body and hose when tightening
the fitting nut.
6.
When assembling unions or two hoses together, three
wrenches will be required.
7.
Check the final condition of the fitting.
Figure 2.8
A - Brazed Sleeve
B - O-Ring
C - Two Piece Sleeve
D - Nut
E - Fitting Body
Table 2.12 O-Ring Face Seal (ORFS) Hydraulic Fittings
Torque Value
4
Flats From Finger Tight
(FFFT)
5
SAE
No.
Thread
Size (in.)
Tube O.D.
(in.)
ft·lbf
N·m
Tube Nuts
Swivel &
Hose
3
6
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
8
13/16
1/2
32–35
43–47
10
1
5/8
45–51
60–68
1/2–3/4
12
1-3/16
3/4
67–71
90–95
14
1-3/16
7/8
67–71
90–95
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
1/4–1/2
1/3–1/2
32
2-1/2
2
–
–
–
–
4.
Torque values and angles shown are based on lubricated connection, as in reassembly.
5.
Always default to the torque value for evaluation of adequate torque.
6.
O-ring face seal type end not defined for this tube size.
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23
Rev. D