Maintenance—General
T7M7G6M,0000577 -19-14APR21-1/1
Unified Inch Bolt and Cap Screw Torque
Values
UNIFIED INCH BOLT AND CAP SCREW TORQUE VALUES—Tolerance is ±10% unless otherwise specified
T
ORQ1A
—UN—15APR13
Top—SAE Grade and Harvester Head Markings; Bottom—SAE Grade and Nut Markings
The following data is intended to assist in the general maintenance of the carrier. It is recommended
only grade 8 hardware or better is used.
Grade 1 (No Mark)
Grade 2
a
(No Mark)
Grade 5, 5.1 or 5.2
Grade 8 or 8.2
Thread
Size
Lubricated
b
N·m (lb-ft)
Dry
c
N·m (lb-ft)
Lubricated
b
N·m (lb-ft)
Dry
c
N·m (lb-ft)
Lubricated
b
N·m (lb-ft)
Dry
c
N·m (lb-ft)
Lubri-
cated
b
N·m
(lb-ft)
Dry
c
N·m (lb-ft)
1/4
3.8 (2.8)
4.7 (3.5)
6 (4.4)
7.5 (5.5)
9.5 (7)
12 (9)
13.5 (10)
17 (12.5)
5/16
7.7 (5.7)
9.8 (7.2)
12 (9)
15.5 (11.5)
19.5 (14.5)
25 (18.5)
28 (20.5)
35 (26)
3/8
13.5 (10)
17.5 (13)
22 (16)
27.5 (20)
35 (26)
44 (32.5)
49 (36)
63 (46)
7/16
22 (16)
28 (20.5)
35 (26)
44 (32.5)
56 (41)
70 (52)
80 (59)
100 (74)
1/2
34 (25)
42 (31)
53 (39)
67 (49)
85 (63)
110 (80)
120 (88)
155 (115)
9/16
48 (35.5)
60 (45)
76 (56)
95 (70)
125 (92)
155 (115)
175 (130)
220 (165)
5/8
67 (49)
85 (63)
105 (77)
135 (100)
170 (125)
215 (160)
240 (175)
305 (225)
3/4
120 (88)
150 (110)
190 (140)
240 (175)
300 (220)
380 (280)
425 (315)
540 (400)
7/8
190 (140)
240 (175)
190 (140)
240 (175)
490 (360)
615 (455)
690 (510)
870 (640)
1
285 (210)
360 (265)
285 (210)
360 (265)
730 (540)
920 (680)
1030 (760)
1300 (960)
1-1/8
400 (300)
510 (375)
400 (300)
510 (375)
910 (670)
1150 (850)
1450 (1075)
1850 (1350)
1-1/4
570 (420)
725 (535)
570 (420)
725 (535)
1280 (945)
1630 (1200)
2050 (1500)
2600 (1920)
1-3/8
750 (550)
950 (700)
750 (550)
950 (700)
1700 (1250)
2140 (1580)
2700 (2000)
3400 (2500)
1-1/2
990 (730)
1250 (930)
990 (730)
1250 (930)
2250 (1650)
2850 (2100)
3600 (2650)
4550 (3350)
a
Grade 2 applies for hex cap screws (not hex bolts) up to six inches (152 mm) long. Grade 1 applies for hex cap screws over six inches (152
mm) long, and for all other types of bolts and screws of any length.
b
"Lubricated" means coated with a lubricant such as engine oil, or fasteners with phosphate and oil coatings.
c
"Dry" means plain or zinc plated without any lubrication.
DO NOT use these values if a different torque value or
tightening procedure is given for a specific application.
Torque values listed are for general use only. Periodically
check the tightness of fasteners.
Shear bolts are designed to fail under predetermined
loads. Always replace shear bolts with bolts of the
identical grade.
Fasteners should be replaced with the same or higher
grade. If higher grade fasteners are used, only tighten
them to the strength of the original.
Make sure fastener threads are clean, and start thread
engagement properly. This will prevent them from failing
when tightening.
Tighten plastic insert or crimped steel-type lock nuts to
approximately 50 per cent of the dry torque shown in the
chart, applied to the nut, not to the bolt head. Tighten
toothed or serrated-type lock nuts to the full torque value.
3-3-3
081921
PN=67
Summary of Contents for HTH616C SIII
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Page 88: ...Miscellaneous Wood Measurement 4 4 2 081921 PN 88...
Page 91: ...Index Index 3 081921 PN 91...
Page 92: ...Index Index 4 081921 PN 92...
