MacDon R85 Operator's Manual page 116

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.
should turn freely until it is bottomed out.
5. Torque fitting further to a given torque value in table
7.12 O-Ring Face Seal (ORFS) Hydraulic Fittings,
page 108.
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.
Table 7.12 O-Ring Face Seal (ORFS) Hydraulic Fittings
SAE Thread
No. Size (in.)
3
6
4 9/16
5
6
6 11/16
8 13/16
10 1
12 1-3/16
14 1-3/16
16 1-7/16
20 1-11/16
24 2
32 2-1/2
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.
169457
MAINTENANCE AND SERVICING
The nut
Tube O.D.
(in.)
ft·lbf
3/16 –
1/4 11–12
5/16 –
3/8 18–20
1/2 32–35
5/8 45–51
3/4 67–71
7/8 67–71
1 93–100
1-1/4 126–141
1-1/2 148–167
–
2
Figure 7.8
A - Brazed Sleeve
C - Two Piece Sleeve
E - Fitting Body
Torque Value
4
N·m
–
14–16
–
24–27
43–47
60–68
90–95
90–95
125–135
170–190
200–225
–
108
B - O-Ring
D - Nut
Flats From Finger Tight
(FFFT)
5
Swivel &
Tube Nuts
Hose
– –
1/4–1/2 1/2–3/4
– –
1/2–3/4
1/4–1/2
1/3–1/2
– –
Rev. F