Table Of Contents - Komatsu 830E Shop Manual

This manual provides dual dimensioning for most spec-
ifications. U.S. standard units are specified first, with
metric (SI) units in parentheses. References through-
out the manual to standard torques or other standard
values will be to one of the following Charts or Tables.
For values not shown in any of the charts or tables,
standard conversion factors for most commonly used
measurements are provided in TABLE XIII, page 1-14.
INDEX OF TABLES
TABLE I . . . . . . .Standard Torque Chart (SAE) . . A5-1
TABLE II .Standard Torque, 12-Point, Grade 9 . . A5-2
TABLE III . . Standard Metric Assembly Torque . . A5-2
TABLE IV. . . . . .JIC Swivel Nuts Torque Chart . . A5-3
TABLE V . . . . . . . . Pipe Thread Torque Chart . . A5-3
TABLE VI. . . . . . . . O-Ring Boss Torque Chart . . A5-3
TABLEVII. . . . O-Ring Face Seal Torque Chart . . A5-3
TABLE VIII. Torque Conversions (ft.lbs. - N.m) . . A5-4
TABLE IX. .Torque Conversions (ft.lbs. - kg.m) . . A5-4
TABLE X . . . Pressure Conversions (psi - kPa) . . A5-4
TABLE XI. . Pressure Conversions (psi - MPa) . . A5-5
TABLE XII . . . . . . . Temperature Conversions . . A5-5
TABLE XIII. . . Common Conversion Multipliers . . A5-6
Grade 5
Cap- TORQUE -
screw GRADE 5
Thread
ft. lbs. kg.m
Size
1/4-20 7 0.97
1/4-28 8 1.11
5/16-18 15 2.07
5/16-24 16 2.21
3/8-16 25 3.46
3/8-24 30 4.15
7/16-14 40 5.5
7/16-20 45 6.2
1/2-13 65 9
1/2-20 70 9.7
9/16-12 90 12.4
9/16-18 95 13.1
5/8-11 125 17.3
5/8-18 135 18.7
3/4-10 220 30.4
A05006 12/01
STANDARD CHARTS AND TABLES
TABLE I. -STANDARD TORQUE CHART
SAE HEX HEAD CAPSCREW AND NUT ASSEMBLY
(LUBRICATED THREADS) - TOLERANCES ±10%
TORQUE -
GRADE 8
N.m ft. lbs. kg.m N.m
9.5 10 1.38 13.6
10.8 11 1.52 14.9
20.3 21 2.90 28
22 22 3.04 30
34 35 4.84 47
41 40 5.5 54
54 58 8.0 79
61 62 8.57 84
88 90 12.4 122
95 95 13.1 129
122 125 17.3 169
129 135 18.7 183
169 175 24.2 237
183 190 26.2 258
298 310 42.8 420
1 ft. lbs. = 0.138 kg.m = 1.356 N.m
EFFECT OF SPECIAL LUBRICANTS
On Fasteners and Standard Torque Values
KOMATSU engineering department does NOT recom-
mend the use of special "friction-reducing" lubricants
such as, "Copper Coat", "Never Seize", and other simi-
lar products on the threads of standard fasteners
where "standard torque" values are applied.
The use of special "friction-reducing" lubricants will sig-
nificantly alter the clamping force being applied to fas-
teners during the tightening process.
If special "friction-reducing" lubricants are used with the
"Standard Torque" values listed below in Table I (and
in Komatsu shop manuals), excessive stress and pos-
sible breakage of the fasteners may result.
Where Torque Tables specify "Lubricated Threads" for
the Standard Torque values listed, these standard
torque values are to be used with simple lithium
base chassis grease (multi-purpose EP NLGI) or a
rust- preventive grease (see list, page 1-10) on the
threads and seats, unless specified otherwise.
NOTE: Always be sure threads of fasteners and
tapped holes are free of burrs and other imperfec-
tions before assembling.
Standard torque values are not to be used when
"Turn-of-the-Nut" tightening procedures are rec-
ommended.
Cap- TORQUE -
screw GRADE 5
Thread
ft. lbs. kg.m
Size
3/4-16 235 32.5
7/8-9 350 48.4
7/8-14 375 51.9
1.0-8 525 72.6
1.0-12 560 77.4
1.0-14 570 78.8
1 1/8-7 650 89.9
1 1/8-12 700 96.8
1 1/4-7 910 125.9
1 1/4-12 975 134.8
1 3/8-6 1200 166
1 3/8-12 1310 181
1 1/2-6 1580 219
1 1/2-12 1700 235
Grade 8
TORQUE -
GRADE 8
N.m ft. lbs. kg.m N.m
319 335 46.3 454
475 500 69.2 678
508 530 73.3 719
712 750 103.7 1017
759 790 109.3 1071
773 800 110.6 1085
881 1050 145 1424
949 1140 158 1546
1234 1480 205 2007
1322 1580 219 2142
1627 1940 268 2630
1776 2120 293 2874
2142 2560 354 3471
2305 2770 383 3756
A5-1