NOTICE
4.6
8.8
10.9
12.9
ADJUSTMENTS 7
30
7.14 TORQUE SPECIFICATION ___________________________________________________
Jacobsen uses Grade 5 (Inch) and Grade 8.8 (Metric) Plated bolts, unless a note is shown. Always check the marks on
the head of the bolts for the bolt grade. For tightening plated bolts, use the value given for lubricated hardware.
7.15 SPECIFIC TORQUE ________________________________________________________
Front Wheel Bolts (10) 40-50 ft. lb. (54-68 Nm)
Rear Wheel Bolts (10) 40-50 ft. lb. (54-68 Nm)
Steering Cylinder Ball Joints (2) 40 ft. lb. (54 Nm)
Tie Rod Ball Joints (2) 30 ft. lb. (40 Nm)
Blade Adapter Bolts (14) 35-40 ft. lb. (47-54 Nm)
Center Blade Bolts (7) 67-83 ft. lb. (91-112 Nm)
The torque values included in these charts are approximate and are for reference. Use these torque values at your
risk. Jacobsen is not responsible for any loss, claim or damage caused by these charts.
Always use caution with
torque values.
AMERICAN NATIONAL STANDARD FASTENERS
SIZE
UNITS
GRADE 5
GRADE 8
SIZE
UNITS
GRADE 5
GRADE 8
Lubricated
Dry
Lubricated
Dry
Lubri-
cated
Dry
Lubri-
cated
Dry
#6-32
in. lb. (Nm)
–
20 (2.3)
–
–
7/16-14
ft. lb. (Nm)
37 (50.1)
50 (67.8)
53 (71.8)
70 (94.9)
#8-32
in. lb. (Nm)
–
24 (2.7)
–
30 (3.4)
7/16-20
ft. lb. (Nm)
42 (56.9)
55 (74.6)
59 (80.0)
78 (105)
#10-24
in. lb. (Nm)
–
35 (4.0)
–
45 (5.1)
1/2-13
ft. lb. (Nm)
57 (77.2)
75 (101)
80 (108)
107 (145)
#10-32
in. lb. (Nm)
–
40 (4.5)
–
50 (5.7)
1/2-20
ft. lb. (Nm)
64 (86.7)
85 (115)
90 (122)
120 (162)
#12-24
in. lb. (Nm)
–
50 (5.7)
–
65 (7.3)
9/16-12
ft. lb. (Nm)
82 (111)
109 (148)
115 (156)
154 (209)
1/4-20
in. lb. (Nm)
75 (8.4)
100 (11.3)
107 (12.1)
143 (16.1)
9/16-18
ft. lb. (Nm)
92 (124)
122 (165)
129 (174)
172 (233)
1/4-28
in. lb. (Nm)
85 (9.6)
115 (13.0)
120 (13.5)
163 (18.4)
5/8-11
ft. lb. (Nm)
113 (153)
151 (204)
159 (215)
211 (286)
5/16-18
in. lb. (Nm)
157 (17.7)
210 (23.7)
220 (24.8)
305 (34.4)
5/8-18
ft. lb. (Nm)
128 (173)
170 (230)
180 (244)
240 (325)
5/16-24
in. lb. (Nm)
173 (19.5)
230 (26.0)
245 (27.6)
325 (36.7)
3/4-10
ft. lb. (Nm)
200 (271)
266 (360)
282 (382)
376 (509)
3/8-16
ft. lb. (Nm)
23 (31.1)
31 (42.0)
32 (43.3)
44 (59.6)
3/4-16
ft. lb. (Nm)
223 (302)
298 404
315 (427)
420 (569)
3/8-24
ft. lb. (Nm)
26 (35.2)
35 (47.4)
37 (50.1)
50 (67.8)
7/8-14
ft. lb. (Nm)
355 (481)
473 (641)
500 (678)
668 (905)
METRIC FASTENERS
SIZE
UNITS
Non Critical
Fasteners into
Aluminum
Lubricated
Dry
Lubricated
Dry
Lubricated
Dry
Lubricated
Dry
M4
Nm (in. lb.)
–
–
–
–
–
–
3.83 (34)
5.11 (45)
2.0 (18)
M5
Nm (in. lb.)
1.80 (16)
2.40 (21)
4.63 (41)
6.18 (54)
6.63 (59)
8.84 (78)
7.75 (68)
10.3 (910
4.0 (35)
M6
Nm (in. lb.)
3.05 (27)
4.07 (36)
7.87 (69)
10.5 (93)
11.3 (102)
15.0 (133)
13.2 (117)
17.6 (156)
6.8 (60)
M8
Nm (in. lb.)
7.41 (65)
9.98 (88)
19.1 (69)
25.5 (226)
27.3 (241)
36.5 (323)
32.0 (283)
42.6 (377)
17.0 (150)
M10
Nm (ft. lb.)
14.7 (11)
19.6 (14)
37.8 (29)
50.5 (37)
54.1 (40)
72.2 (53)
63.3 (46)
84.4 (62)
33.9 (25)
M12
Nm (ft. lb.)
25.6 (19)
34.1 (25)
66.0 (48)
88.0 (65)
94.5 (70)
125 (92)
110 (81)
147 (108)
61.0 (45)
M14
Nm (ft. lb.)
40.8 (30)
54.3 (40)
105 (77)
140 (103)
150 (110)
200 (147)
175 (129)
234 (172)
94.9 (70)
