67
Bolt‘s diameter
mm
Grade
4.6
5.6
6.8
8.8
12
36
～
45
45
～
55
58
～
78
78
～
104
14
55
～
70
70
～
90
93
～
124
124
～
165
16
90
～
110
110
～
140
145
～
193
193
～
257
18
120
～
150
150
～
190
199
～
264
264
～
354
20
170
～
210
210
～
270
282
～
376
376
～
502
22
230
～
290
290
～
350
384
～
512
512
～
683
24
300
～
377
370
～
450
488
～
650
651
～
868
27
450
～
530
550
～
700
714
～
952
952
～
1269
30
540
～
680
680
～
850
969
～
1293
1293
～
1723
33
670
～
880
825
～
1100
1319
～
1759
1759
～
2345
36
900
～
1100
1120
～
1400
1694
～
2259
2259
～
3012
39
928
～
1237
1160
～
1546
1559
～
2079
2923
～
3898
Note
：
·
Use entirely 8.8 grade bolt in the important joint position.
·
Bolt‘s grade can be found in the head, if it can‘t be found, the grade is 8.8.
3. Periodic replacement of key safe parts
Some parts are not checked during routine maintenance. Please refer to the table below for the
average service life of these parts
Replace them when their service life has expired, sooner if they damaged.
Name of key safe part
service life (years)
Brake hose or hard tube
l
～
2
Hydraulic rubber hose for lifting system
l
～
2
Lifting chain
2
～
4
High pressure rubber hose or tube for hydraulic
system
2
Grease cup for brake fluid
2
～
4
Fuel tube
2
Sealing member, rubber articles inside of
hydraulic system
2
