Husqvarna PZ 72 Owners Manual - Page 54
TORQUE SPECIFICATIONS, U.S. Standard Hardware, Grade
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TECHNICAL DATA TORQUE SPECIFICATIONS Engine crankshaft bolt 50 ft/lb (67 Nm) Standard 5/16" fasteners 18 ft/lb (25 Nm) Deck pulley bolts Blade bolt 150 ft/lb (201 Nm) 90 ft/lb (122 Nm) Standard 3/8" fasteners Standard 7/16" fasteners 33 ft/lb 52 ft/lb (44 Nm) (70 Nm) Standard ¼" fasteners 9 ft/lb (12 Nm) Standard ½" fasteners 80 ft/lb (110 Nm) HEX HEAD CAP SCREWS The torque values shown should be used as a general guideline when specific torque values are not given. U.S. Standard Hardware Grade SAE Grade 5 SAE Grade 8 Flangelock Screw w/Flangelock Nut Size ft./lbs Nm ft./lbs Nm ft./lbs Nm ¼ 9 12 13 18 5/16 18 24 28 38 24 33 Shank Size (Diameter in inches, fine or coarse thread) 3/8 31 42 46 62 40 54 7/16 50 68 75 108 ½ 75 102 115 156 9/16 110 150 165 224 5/8 150 203 225 305 ¾ 250 339 370 502 7/8 378 513 591 801 11/8 782 1060 1410 1912 ** Grade 5 - Minimum commercial quality (lower quality not recommended) Metric Standard Hardware Grade Grade 8.8 Grade 10.9 Size ft./lbs Nm ft./lbs Nm M4 1.5 2 2.2 3 Grade 12.9 ft./lbs Nm 2.7 3.6 M5 3 4 4.5 6 5.2 7 M6 5.2 7 7.5 10 8.2 11 M7 8.2 11 12 16 15 20 M8 13.5 18 18.8 25 21.8 29 M10 24 32 35.2 47 43.5 58 M12 43.5 58 62.2 83 75 100 M14 70.5 94 100 133 119 159 M16 108 144 147 196 176 235 M18 142 190 202 269 242 323 M20 195 260 275 366 330 440 M22 276 368 390 520 471 628 M24 353 470 498 664 596 794 M27 530 707 474 996 904 1205 Shank Size (Diameter in millimeters, fine or coarse thread) 54