TECHNICAL DATA
Torque Specifi cations
Engine crankshaft bolt
Deck pulley bolts
Lug nuts
Blade bolt
The torque values shown must be used as a general guideline
U.S. Standard Hardware
Grade
Size
ft./lbs
1/4
5/16
18
3/8
31
7/16
50
1/2
75
9/16
110
5/8
150
3/4
250
7/8
378
1-1/8
782
** Grade 5 - Minimum commercial quality (lower quality not recommended)
Metric Standard Hardware
Grade
Size
ft./lbs
M4
M5
M6
M7
M8
13.5
M10
M12
43.5
M14
70.5
M16
108
M18
142
M20
195
M22
276
M24
353
M27
530
36
Standard 1/4" fasteners
50 ft/lb
Standard 5/16" fasteners
150 ft/lb
Standard 3/8" fasteners
75 ft/lb
Standard 7/16" fasteners
90 ft/lb
Standard 1/2" fasteners
HEX HEAD CAP SCREWS
when specifi c torque values are not given.
SAE Grade 5
Nm
ft./lbs
9
12
13
24
28
42
46
68
75
102
115
149
165
203
225
339
370
512
591
1060
1410
Grade 8.8
Nm
ft./lbs
1.5
2
3
4
5.2
7
8.2
11
18
18.8
24
33
35.2
59
62.2
96
100
146
147
193
202
264
275
374
390
478
498
719
735
9 ft/lb
18 ft/lb
33 ft/lb
52 ft/lb
80 ft/lb
SAE Grade 8
Flangelock Screw
w/Flangelock Nut
Nm
ft./lbs
18
38
24
62
40
102
156
224
305
502
801
1912
Grade 10.9
Nm
ft./lbs
2.2
3
2.7
4.5
6
5.2
7.5
10
8.2
12
16
25
21.8
48
43.5
84
136
119
199
176
274
242
373
330
529
471
675
596
996
904
Nm
33
54
Grade 12.9
Nm
3.7
7
11
15
20
30
59
75
102
161
239
328
447
639
808
1226