Komatsu D32E-1 Operation & Maintenance Manual page 118

21. STANDARD TIGHTENING TORQUES
21.2.2
GRADE 8 PHOSPHATE COATED HARD-
WARE
NOMINAL
THREAD
STANDARD TORQUE f 10%
Narn Ibfft
II4
I
IO
1 8
9/16 1
130
I
100
518
I
180
I
140
314
I
325
I
240
718
I
520
I
390
1
I
780
I
580
I-118 1110 820
l-1/4 1565 1160
I-318 2050 1520
I-112 2720 2020
I-314 3380 2510
2 5080 3780
21.2.3 STANDARD METRIC FASTENERS
II
NOMINAL STANDARD TORQUE
THREAD f 10%
II
II MILLIMETERS I N*m I Ibf fi II
II M6 I
IO
I
7
II
DO NOT SUBSTITUTE.
II M7 I
16
I
12
II
II
M8
I
23 17
II
II
Ml0 I
34
II
Ml2 80 60
Ml4 125 90
Ml6 200 150
Ml8 275 200
M20 385 290
II
M22 1 530
I 390 II
II
M24 I 670
I
500
II
II
M27 I 980
I
730
II
M30 1330 990
M33 1790 1330
This chart provides tightening torque for general purpose
applications using original equipment standard hardware
as listed in the Parts Books for the machine involved.
DO NOT SUBSTITUTE.
Original equipment standard hardware is defined as
Grade 8, coarse thread bolts and nuts and thru hardened
flat washers (Rockwell "c" 38-45) all phosphate coated
and assembled without supplemental lubrication (as
received) condition.
The torques shown also apply to the following;
Phosphate coated bolts used in tapped holes in steel
or gray iron. Phosphate coated bolts used with phos-
phate coated prevailing torque nuts (nuts with distorted
threads or plastic inserts). Phosphate coated bolts
used with copper plated weld nuts.
Markings on bolt heads or nuts indicate material grade
ONLY and are NOT to be used to determine required
torque.
This chart provides tightening torque for general purpose
applications using original standard hardware as listed in
the Parts Book for the machine involved.
Original standard hardware is defined as metric class
10.9 bolts and class 10.0 nuts and thru flat washers
(Rockwell "C" 38-45) all phosphate coated and assem-
bled without supplemental lubrication.
The torques shown also apply to the following;
Phosphate bolts used in tapped holes in steel or gray
iron, with phosphate coated prevailing torque nuts or
with copper plated weld nuts.
Markings on bolt heads or nuts indicate material class
ONLY and are NOT to be used to determine required
torque.
M36 2325
1730
M39 3010 2240
3-17