Doosan D55C-5 - Operational Safety Warnings

D439E Service Manual 1. General Information
9
Tightening Torque Table of Standard Parts
Torque Nm (kg.cm, lb.ft)
Bolt nominal diameter Pitch (mm)
Head Mark 4 Head Mark 7
M5 0.8 3~4 (30~40, 2.2~2.9) 5~6 (50~60, 3.6~4.3)
M6 1.0 5~6 (50~60, 3.6~4.3) 9~11 (90~110, 6.5~8.0)
M8 1.25 12~15 (120~150, 9~11)
20~25 (200~250,
14.5~18.0)
M10 1.25
25~30 (250~300,
18~22)
30~50 (300~500,
22~36)
M12 1.25
35~45 (350~450,
25~33)
60~80 (600~800,
43~58)
M14
1.5
75~85 (750~850,
54~61)
120~140 (1,200~1,400,
85~100)
M16 1.5
110~130 (1,100~1,300,
54~61)
180~210(1,800~2,100,
130~150)
M18 1.5
160~180 (1,600~1,800,
116~130)
260~300(2,600~3,000,
190~215)
M20 1.5
220~250 (2,200~2,500,
160~180)
360~420 (3,600~4,200,
260~300)
M22 1.5
290~330 (2,900~3,300,
210~240)
480~550(4,800~5,500,
350~400)
M24 1.5
360~420 (3,600~4,200,
260~300)
610~700 (6,100~7,000,
NOTE
1. The torques shown in the table are standard
values under the following conditions :
• Nuts and bolts are made of galvanized steel bar.
• Galvanized plain steel washers are inserted.
• All nuts, bolts and plain washers are dry.
2. The torques in the table are not applicable under
following conditions:
• When spring washers, toothed washers and
other similar parts are inserted.
• If plastic parts are fastened.
• If self-tapping screws or self-locking nuts are
used.
• If threads and surfaces are coated with oil.
3. If you reduce the torques in the table to the
percentage indicated below-under the following
conditions, it will be the standard value.
• If spring washers are used : 85%
• If threads and bearing surfaces are stained
with oil : 85%