Operation Manual / A170-M.. - A175-M..
10 Taking a turbocharger out of operation / 10.2 Locking the rotor
© Copyright 2022 ABB. All rights reserved. HZTL4033_EN Rev.K January 2022
10.2.2 Fitting the locking device
CAUTION
Turbocharger damage resulting from rotor unbalance
Removing the balancing screws from the compressor wheel will result in ro-
tor unbalance.
u Only use free threaded holes to fit the lifting spigot (74027).
u Remove the filter silencer or air suction branch (see chapter Removing the air inlets →79).
Fig.74: Fitting the locking device
Product Part number 72011 Part number 94006 / 94007
A170-M 170 Nm 25 Nm
A175-M 220 Nm 50 Nm
Table56: Locking device tightening torque
1. Press off the spinner nose cone(25012) with the press-off screw(90917).
2. Remove two studs (72026) and three screws (72011) in the upper area.
3. Insert the lifting spigot (90441) into the compressor wheel.
Screw screws (94007) into the free threaded holes of the compressor wheel.
4. Position assembly/disassembly device (94003) with screws (72011) and lifting spigot
(90427).
Rotate compressor wheel in such a way that the holes in the lifting spigot (90427) corres-
pond with the holes in the assembly/disassembly device (94003).
5. Secure assembly/disassembly device (94003) to the lifting spigot (90427) with screws
(94006).
Page 121 / 146
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