Farm King FK301 Operator And Parts Manual - page 17
17
Bolt Torque - Finishing Mower
Bolt Torque
Checking Bolt Torque
The tables shown below give correct torque values for various bolts and hex bolts. Tighten all
bolts to the torques specified in chart unless otherwise noted. Check tightness of bolts periodically,
using bolt torque chart as a guide. Replace hardware with the same strength bolt.
Bolt Torque*
Bolt Diameter
Grade 2 Bolts
Grade 5 Bolts
Grade 8 Bolts
(inches)
SAE 2
SAE 5
SAE 8
“A”
(lb-ft)
(N.m)
(lb-ft)
(N.m)
(lb-ft)
(N.m)
0.25 (1/4)
6
8
9
12
12
17
0.313 (5/16)
10
13
19
25
27
36
0.375 (3/8)
20
27
33
45
45
63
0.438 (7/16)
30
42
53
72
75
100
0.5 (1/2)
45
61
80
110
115
155
0.563 (9/16)
70
95
115
155
165
220
0.625 (5/8)
95
128
160
215
220
305
.75 (3/4)
165
225
290
390
400
540
0.875 (7/8)
170
230
420
570
650
880
1
225
345
630
850
970
1320
NOTE: See page 15 for correct spindle torque. Do not use this chart for spindle bolt only.
Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless otherwise
specified. Therefore, do not grease or oil bolts or hex bolts unless otherwise specified in this manual. When
using locking elements, increase torque values by 5%.
* Torque value for bolts and hex bolts are identified by their head markings.