Operation Manual / Power2 850-M / 4.2 High-pressure stage
4 Disassembly and assembly / 4.12 Installing the compressor casing
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HZTL4063_EN
Rev.D
July 2020
4.12
Installing the compressor casing
Fig. 21: Installing the compressor casing
Part number
Thread and tightening torque
61090
M12
120 Nm
61090 (nuts that are difficult to access)
Pre-tightening torque 50 Nm
Tightening angle 30° ±5°
90 Nm
1)
Table 10: Tightening torque (61090)
1) Application with adapter 90249 and special key 90250, see below
1. Fit a new O-ring (42012).
2. Secure lifting gear to swivel lifting eye (90657) and insert compressor casing.
(Installation of bracket and plates
(see Fig. 9: Removing the compressor casing
3. Fit nuts (61090). Observe tightening torque.
4. Remove plates (90031) and bracket (90030).
Application of special key for nuts that are difficult to access
u
Attach the special key (90250 / 91250 / 90251 / 91251) to the torque spanner by using the
adapter (90249 / 91249).
u
Use the special key in an angle range between 30° and 90°.
u
Use the special key only for nuts that are difficult to access and observe the reduced
torque.
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