Husqvarna Z 246 Operator's Manual page 32

TECHNICAL DATA
Torque Specifications
Engine crankshaft bolt
Deck pulley bolts
Lug nuts
Blade bolt
The torque values shown should be used as a general guideline
U.S. Standard Hardware
Grade
Size
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1-1/8
** Grade 5 - Minimum commercial quality (lower quality not recommended)
Metric Standard Hardware
Grade
Size
M4
M5
M6
M7
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
32
50 ft/lb
150 ft/lb
75 ft/lb
90 ft/lb
HEX HEAD CAP SCREWS
when specific torque values are not given.
SAE Grade 5
ft./lbs Nm
9 12
18 24
31 42
50 68
75 102
110 149
150 203
250 339
378 512
782 1060
Grade 8.8
ft./lbs Nm
1.5 2
3 4
5.2 7
8.2 11
13.5 18
24 33
43.5 59
70.5 96
108 146
142 193
195 264
276 374
353 478
530 719
Standard 1/4" fasteners
Standard 5/16" fasteners
Standard 3/8" fasteners
Standard 7/16" fasteners
Standard 1/2" fasteners
SAE Grade 8
ft./lbs Nm
13 18
28 38
46 62
75 102
115 156
165 224
225 305
370 502
591 801
1410 1912
Grade 10.9
ft./lbs Nm
2.2 3
4.5 6
7.5 10
12 16
18.8 25
35.2 48
62.2 84
100 136
147 199
202 274
275 373
390 529
498 675
735 996
9 ft/lb
18 ft/lb
33 ft/lb
52 ft/lb
80 ft/lb
Flangelock Screw
w/Flangelock Nut
ft./lbs Nm
24 33
40 54
Grade 12.9
ft./lbs Nm
2.7 3.7
5.2 7
8.2 11
15 20
21.8 30
43.5 59
75 102
119 161
176 239
242 328
330 447
471 639
596 808
904 1226