Atlas Copco PNS 1250 Cud S3A/T3 APP, Instruction Manual

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11 Technical specifications
11.1 Torque values
11.1.1 For general applications
The following tables list the recommended torques
applied for general applications at assembly of the
compressor.
For hexagon screws and nuts with strength grade 8.8:
For hexagon screws and nuts with strength grade
12.9:
11.1.2 For important assemblies 11.2 Settings of shutdowns and
safety valves
Thread size M6 M8 M10 M12 M14 M16
Nm 9 23 46 80 125 205
Thread size M6 M8 M10 M12 M14 M16
Nm 15 39 78 135 210 345
Assemblies Unit Torque
values
Axles to frame:
Wheel nuts Nm 80 + 10/- 0
Bolts, towing eye/towbar Nm 80 ± 10
Bolts, towbar/turntable Nm 80 ± 10
Bolts, front axle/frame Nm 80 ± 10
Bolts, rear axle/frame Nm 205 ± 20
Compressor to frame:
Bolts, elements/gear casing Nm 80 ± 10
Bolts, gear casing/support Nm 205 ± 20
Bolts, support/buffer Nm 205 ± 20
Bolts, buffer/frame Nm 80 ± 10
Engine to frame:
Bolts, engine/support Nm 205 ± 20
Bolts, support/buffer Nm 205 ± 20
Bolts, buffer/frame Nm 80 ± 10
Lifting beam to frame:
Bolts, lifting beams/yoke
(M12) Nm 80 ± 10
Bolts, lifting beams/yoke
(M16) Nm 205 ± 20
Bolts, yoke/lifting supports Nm 205 ± 20
Bolts, lifting supports/frame Nm 205 ± 20
Designation Value
Engine shutdowns (see EOM)
Fuel level 5%
LP element temperature 250°C
MP element temperature 250°C
HP element temperature 250°C
Compressor oil pressure 1.2 bar(e)
MP safety valve opening pressure 15.0 bar(e)
HP safety valve opening pressure 28.0 bar(e)
Relief valves opening pressure 3.7 bar(e)