ABB HT608784 - Table 16: Tightening Torque (81273); Table 15: Tightening Torque (81272); Fig. 28: Cleaning the Slotted Diffuser; Cleaning the Slotted Diffuser

Operation Manual / A170-M.. - A175-M..
7 Periodic maintenance / 7.3 Cleaning the slotted diffuser
© Copyright 2021 ABB. All rights reserved. HZTL4033_EN Rev.I November 2021
u Tighten screws(81272) alternately and evenly. Observe tightening torque
Screw Tightening torque [Nm]
81272 20
Table15: Tightening torque (81272)
u Fit the lock nuts(81273) on the screw(81272). Observe tightening torque.
Lock nut Tightening torque [Nm]
81273 40
Table16: Tightening torque (81273)
u If present: Fit the filter ring(81265) (see Fig.26: Cleaning the filter silencer →54).
7.3 Cleaning the slotted diffuser
u Remove the diffuser (see Removing the compressor casing →81).
Fig.28: Cleaning the slotted diffuser
u Clean the diffuser slots (S).
When cleaning, please note that this should only take place using lightly pressurized air, a
brush and a moist cleaning cloth.
u Have any heavily contaminated or damaged diffusers replaced by an ABB Turbocharging
Service Station.
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