HYDRAULICS
8C-6
37° FLARE FITTINGS
Torque Recommendations
1. Assemble tube nut adapter to fitting with a mini-
mum torque (finger tight) until the flare contact the
seat on the fitting body.
2. For tightening reference mark a line lengthwise on
the flats of both the nut and adapter fitting with a
marker shown in Figure 8C-1.
Figure 8C-1. Reference Marking
3. Using a wrench, tighten the nut the amount shown
in the table below. The line will show which fittings
have been tightened correctly and also indicates if
a fitting is becoming loose.
Table 8C-1: 37° Flare Torque Recommendations
HOSE INSTALLATION
INSTRUCTIONS
1. Hold the fixed portion of the hose coupling with
one wrench; use a second wrench to tighten or
loosen the hose nut. This will avoid damaging the
fitting seal. When tightening a hose, do not permit
it to twist; hold it in a normal straight position.
2. When installing mower hoses, place the fittings at
angles to avoid contact with fixed parts when turn-
ing. Make sure hoses are assembled to proper “A”
and “B” ports on components.
Assemble Finger Tight
and Mark as Shown.
Tighten per Chart
SAE
Dash
Size
Thread
Size
Tube
O.D.
Torque In-
lbs
# of Flat
Rotations
3 3/8-24 0.188 95-105 1 1/2:1 3/4
4 7/16-20 0.250 135-145 2 1/4:2 3/4
5 1/2-20 0.312 170-190 3 1/4:3 3/4
6 9/16-18 0.375 215-245 2 1/4:2 3/4
8 3/4-16 0.500 430-470 2 1/4:2 3/4
10 7/8-14 0.625 680-750 2:2 1/2
12 1 1/16-12 0.750 950-1050 2:2 1/2
14 1 3/8-12 0.875 1000-1100 1:1 1/2
16 1 5/16-12 1.000 1300-1360 2 1/4:2 3/4
20 1 5/8-12 1.250 1520-1600 1 1/4:1 3/4
24 1 7/8-12 1.500 1900-2000 3/4:1 1/4
Tube O.D or Hose I.D. Rotate No. of Hex Flats
3/8” 2
1/2” 2
5/8” 1 1/2-2
1” 3/4-1
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