Tightening Torque Of Plug Screw; Hollow Screw (4-Hole) Tightening Torque - Doosan DP158L Series Operation & Maintenance Manual

2. Tightening Torque of Key General Bolts
Nominal Diameter x
Pitch (mm)
M6 x 1
M8 x 1.25
M8 x 1
M10 x 1.5
M10 x 1.0
M12 x 1.75
M12 x 1.5
M14 x 1.5

Tightening torque of plug screw

M10 M12
5.0 5.0

Hollow Screw (4-Hole) Tightening Torque

Material
Classifi- M8
cation
SM25C -
a
0.8
SUM22L
STS304 0.8
a. Applied to Doosan Engines
Strength Classification
8.8T
Tightening Torque (kgf·m) ± 10%
1
2.2
2.4
4.4
5
7.5
8
13
M14 M16
8.0 8.0
M10 M12 M14
1.6 2.5 3.5
1.8 3.0 4.0
1.8 3.0 4.0
10.9T 12.9T
1.25
3.1
3.35
6.2
7
10.5
11.2
18.5
M18 M22
10.0 10.0
M16 M18 M22
4.5 5.5 9.0
5.5 6.5 11.0
5.5 6.5 11.0
75
5. About the engine
Remarks
1.5
3.8
4.1
7.4
8.4
12.5
13.4
22
M24 M26
12.0 12.0
M26 M30
13.0 18.0
16.0 20.0
16.0 20.0
M30
15.0
M38
30.0
35.0
35.0