Komatsu D65PX-12 Service Manual

STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS MAINTENANCE
4-16
STANDARD TIGHTENING TORQUES FOR BOLTS
AND NUTS
TORQUE LIST
CAUTION
If nuts, bolts, or other parts are not tightened to the specified torque, it will cause looseness or damage to
the tightened parts, and this will cause failure of the machine or problems with operation.
Always pay careful attention when tightening parts.
Unless otherwise specified, tighten the metric nuts and bolts to the torque shown in the table below.
The tightening torque is determined by the width across the flats of the nut and bolt.
If it is necessary to replace any nut or bolt, always use a Komatsu genuine part of the same size as the part that
was replaced.
Apply the following table for Hydraulic Hose.
Thread
diameter
a (mm)
Width
across
flat b
(mm)
Tightening torque
Target value Service limit
N•m kgf•m lbft N•m kgf•m lbft
6 10 13.2 1.35 9.8 11.8 - 14.7 1.2 - 1.5 8.7 - 10.8
8 13 31 3.2 23.1 27 - 34 2.8 - 3.5 20.3 - 25.3
10 17 66 6.7 48.5 59 - 74 6.0 - 7.5 43.4 - 54.2
12 19 113 11.5 83.2 98 - 123 10.0 - 12.5 72.3 - 90.4
14 22 177 18 130.2 157 - 196 16.0 - 20.0 115.7 - 144.7
16 24 279 28.5 206.1 245 - 309 25.0 - 31.5 180.8 - 227.8
18 27 382 39 282.1 343 - 425 35.0 - 43.5 253.2 - 314.6
20 30 549 56 405.0 490 - 608 50.0 - 62.0 361.7 - 448.4
22 32 745 76 549.7 662 - 829 67.5 - 84.5 488.2 - 611.2
24 36 927 94.5 683.5 824 - 1030 84.0 - 105.0 607.6 - 759.5
27 41 1320 135.0 976.5 1180 - 1470 120.0 - 150.0 868.0 - 1085.0
30 46 1720 175.0 1265.8 1520 - 1910 155.0 - 195.0 1121.1 - 1410.4
33 50 2210 225.0 1627.4 1960 - 2450 200.0 - 250.0 1446.6 - 1808.3
36 55 2750 280.0 2025.2 2450 - 3040 250.0 - 310.0 1808.3 - 2242.2
39 60 3280 335.0 2423.1 2890 - 3630 295.0 - 370.0 2133.7 - 2676.2
Thread
diameter
a (mm)
Width
across
flat b
(mm)
Tightening torque
Target value Service limit
N•m kgf•m lbft N•m kgf•m lbft
14 19 29.4 3.0 21.7 27.5 - 39.2 2.8 - 4.0 20.3 - 28.9
18 24 78.5 8.0 57.3 58.8 - 98.1 6.0 - 10.0 43.4 - 72.3
22 27 117.7 12.0 86.8 88.3 - 137.3 9.0 - 14.0 65.1 - 101.3
24 32 147.1 15.0 108.5 117.7 - 176.5 12.0 - 18.0 86.8 - 130.2
30 36 215.7 22.0 159.1 176.5 - 245.2 18.0 - 25.0 130.2 - 180.8
33 41 255.0 26.0 188.1 215.7 - 284.4 22.0 - 29.0 159.1 - 209.8

Komatsu D65PX-12 Specifications

General

Brand	Komatsu
Model	D65PX-12
Category	Construction Equipment
Language	English