4.2 General procedures
4.2.1 Performing a leak-down test
General
After refitting any motor and gearbox, the integrity of all seals enclosing the gearbox
oil must be tested. This is done in a leak-down test.
Required equipment
NoteArt. no.Equipment, etc.
3HAC0207-1Leakdown tester
-Leak detection spray
Procedure
NoteAction
Finish the refitting procedure of the motor or gear in
question.
1
Art. no. is specified in Required
equipment on page 148.
Remove the topmost oil plug on the gear in question
and replace it with the leakdown tester.
Adapters, which are included in the leakdown tester
kit, may be required.
2
Correct value:Apply compressed air and raise the pressure with
the knob until the correct value is shown on the
manometer.
3
0.2 - 0.25 bar (20 - 25 kPa)
Disconnect the compressed air supply.4
If the compressed air is signific-
antly colder or warmer than the
gearbox to be tested, a slight
pressure increase or decrease
may occur. This is quite normal.
Wait for approx. 8-10 minutes. No pressure loss may
be detected.
5
Was any pressure drop evident?
6
Localize the leak as detailed below.
Remove the leakdown tester and refit the oil plug.
The test is complete.
Spray suspected leak areas with leak detection spray.
Bubbles indicate a leak.
7
When the leak has been localized, take the necessary
measures to correct the leak.
8
148 3HAC039838-001 Revision: C
© Copyright 2013 ABB. All rights reserved.
4 Repair
4.2.1 Performing a leak-down test
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