Operation Manual / Power2 340-H / High-pressure stage
3 Removal and installation / 3.2 Removing the high-pressure stage
© Copyright 2022 ABB. All rights reserved. HZTL4054_EN Rev.F March 2022
Loosening the clamping nut
CAUTION
Incorrect procedure can make loosening impossible
If individual pressure screws are fully relieved, the pressure screws can be-
come compressed, making it impossible to loosen them.
u Comply with the following steps for loosening the pressure screws.
CAUTION
Do not clean pressure screws
The pressure screws are equipped with a permanent sliding layer that must
not be removed. In case of non-compliance, it cannot be ensured that the
necessary tension force is reached.
u Do not clean pressure screws.
u Do not lubricate pressure screws.
If a screw jams, the previously loosened screw must be tightened again a little.
Fig.14: Loosening the clamping nut
1. Working in a circle, break loose each pressure screw (≤20°).
2. Working in a circle, loosen each pressure screw by 45° in 4 rounds.
3. Working in a circle, loosen each pressure screw by 90° in 1…5 rounds until all of the pres-
sure screws have been relieved.
u Loosen clamping nut by hand.
Page 32 / 114
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