82 51-3849, 5/26/06
NOTE - ft-lb may be converted to Newton Meters by multiplying by 1.35582.
NOTE - in-lbs may be converted to Newton Meters by multiplying by 0.11298.
APPENDIX
TORQUE SPECS.
Hydraulic Torque Specifications
Straight Thread O-ring Fitting: Assembly, Fitting to Port
NOTE - Straight thread o-ring fittings are utilized to adapt hydraulic systems to
motors, pumps, cylinders, and valves.
Installation (Adjustable Fitting)
1. Make sure threads and sealing surfaces are free of burrs, nicks, scratches, or any foreign materials.
2. Install proper SAE o-ring on port end of fitting if not already installed. Ensure o-ring is fully seated and retained properly.
3. Lubricate o-ring with a light coating of clean hydraulic oil.
4. Back off nut as far as possible and push washer up as far as possible. (Figure 4 & 5)
5. Screw fitting into port. Hand tighten fitting until backup washer contacts face of port. (Figure 6)
6. To position the fitting, unscrew to desired position, but not more than one full turn.
7. Hold fitting in position with wrench. Using appropriate torquing device, tighten nut to given torque rating from the table in
section. (Figure 7)
-4 7/16 - 20 190 ± 10 16 ± 1
-6 9/16 - 18 420 ± 15 35 ± 1
-8 3/4 - 14 720 ± 25 60 ± 2
-10 7/8 - 14 1260 ± 50 105 ± 5
-12 1 1/16 - 12 1680 ± 75 140 ± 6
-16 1 5/16 - 12 2520 ± 100 210 ± 8
-20 1 5/8 - 12 3100 ± 150 260 ± 12
-24 1 7/8 - 12 3800 ± 150 315 ± 12
Fitting SAE Port
Size Thread Size In-Lbs Ft-Lbs
Torque Values
Figures 4, 5, 6 and 7
