NOTICE
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)
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