Torque Specification; Specific Torque - Jacobsen R-311T Maintenance Manual

3 ADJUSTMENTS

3.18 TORQUE SPECIFICATION___________________________________________________

All torque values included in these charts are approximate and are for reference only. Use of these torque values is
at your sole risk. Jacobsen is not responsible for any loss, claim, or damage arising from the use of these charts.
Extreme caution should always be used when using any torque value.
Jacobsen uses Grade 5 Plated bolts as standard unless otherwise noted. For tightening plated bolts use the value
given for lubricated.
SIZE UNITS
Lubricated
#6-32 in-lb (Nm) –
#8-32 in-lb (Nm) –
#10-24 in-lb (Nm) –
#10-32 in-lb (Nm) –
#12-24 in-lb (Nm) –
1/4-20 in-lb (Nm) 75 (8.4)
1/4-28 in-lb (Nm) 85 (9.6)
5/16-18 in-lb (Nm) 157 (17.7)
5/16-24 in-lb (Nm) 173 (19.5)
3/8-16 ft-lb (Nm) 23 (31.1)
3/8-24 ft-lb (Nm) 26 (35.2)
SIZE UNITS
Lubricated
M4 Nm (in-lb) –
M5 Nm (in-lb) 1.80 (16)
M6 Nm (in-lb) 3.05 (27)
M8 Nm (in-lb) 7.41 (65)
M10 Nm (ft-lb) 14.7 (11)
M12 Nm (ft-lb) 25.6 (19)
M14 Nm (ft-lb) 40.8 (30)

3.19 SPECIFIC TORQUE ________________________________________________________

Tie Rod Ball Joints (2): 30 ft lb. (40 Nm).
Steering Cylinder Ball Joints (2): 40 ft lb (54 Nm).
Blade Adapter Bolts (14): 35 - 40 ft lb (47 - 54 Nm).
Center Blade Bolts (7): 67-83 ft lb (91-112 Nm).
Rear Wheel Bolts (10): 40 - 50 ft lb (54 - 68 Nm).
18
AMERICAN NATIONAL STANDARD FASTENERS
GRADE 5 GRADE 8
Dry Lubricated
20 (2.3) –
24 (2.7) –
35 (4.0) –
40 (4.5) –
50 (5.7) –
100 (11.3) 107 (12.1)
115 (13.0) 120 (13.5)
210 (23.7) 220 (24.8)
230 (26.0) 245 (27.6)
31 (42.0) 32 (43.3)
35 (47.4) 37 (50.1)
4.6
Dry Lubricated
– –
2.40 (21) 4.63 (41)
4.07 (36) 7.87 (69)
9.98 (88) 19.1 (69)
19.6 (14) 37.8 (29)
34.1 (25) 66.0 (48)
54.3 (40) 105 (77)
NOTICE
SIZE UNITS
Dry
– 7/16-14 ft-lb (Nm)
30 (3.4) 7/16-20 ft-lb (Nm)
45 (5.1) 1/2-13 ft-lb (Nm)
50 (5.7) 1/2-20 ft-lb (Nm)
65 (7.3) 9/16-12 ft-lb (Nm)
143 (16.1) 9/16-18 ft-lb (Nm)
163 (18.4) 5/8-11 ft-lb (Nm)
305 (34.4) 5/8-18 ft-lb (Nm)
325 (36.7) 3/4-10 ft-lb (Nm)
44 (59.6) 3/4-16 ft-lb (Nm)
50 (67.8) 7/8-14 ft-lb (Nm)
METRIC FASTENERS
8.8 10.9
Dry Lubricated
– –
6.18 (54) 6.63 (59)
10.5 (93) 11.3 (102)
25.5 (226) 27.3 (241)
50.5 (37) 54.1 (40)
88.0 (65) 94.5 (70)
140 (103) 150 (110)
Front Wheel Bolts (10): 85-95 ft lb (115 - 129 Nm)
GRADE 5
Lubri- Dry
cated
37 (50.1) 50 (67.8)
42 (56.9) 55 (74.6)
57 (77.2) 75 (101)
64 (86.7) 85 (115)
82 (111) 109 (148)
92 (124) 122 (165)
113 (153) 151 (204)
128 (173) 170 (230)
200 (271) 266 (360)
223 (302) 298 404
355 (481) 473 (641)
12.9
Dry Lubricated
– 3.83 (34) 5.11 (45)
8.84 (78) 7.75 (68) 10.3 (910
15.0 (133) 13.2 (117) 17.6 (156)
36.5 (323) 32.0 (283) 42.6 (377)
72.2 (53) 63.3 (46) 84.4 (62)
125 (92) 110 (81) 147 (108)
200 (147) 175 (129) 234 (172)
GRADE 8
Lubri- Dry
cated
53 (71.8) 70 (94.9)
59 (80.0) 78 (105)
80 (108) 107 (145)
90 (122) 120 (162)
115 (156) 154 (209)
129 (174) 172 (233)
159 (215) 211 (286)
180 (244) 240 (325)
282 (382) 376 (509)
315 (427) 420 (569)
500 (678) 668 (905)
Non Critical
Fasteners
into
Aluminum
Dry
2.0 (18)
4.0 (35)
6.8 (60)
17.0 (150)
33.9 (25)
61.0 (45)
94.9 (70)