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1.8. Performing a leak-down test
213HAC023297-001 Revision: A
1.8. Performing a leak-down test
General
After refitting any motor and any gearbox, the integrity of all seals enclosing the gearbox oil
must be tested. This is done in a leak-down test.
Required equipment
Procedure
Equipment, etc. Art. no. Note
Leakdown tester 3HAC 0207-1
Leak detection spray -
Step Action Note/Illustration
1. Finish the refitting procedure of the motor or gear in
question.
2. Remove the topmost oil plug on the gear in question,
and replace it with the leakdown tester .
Adapters may be required, which are included in the
leakdown tester kit.
Art. no. is specified above!
3. Apply compressed air, and raise the pressure with the
knob until the correct value is shown on the
manometer.
Recommended value: 0.2 -
0.25 bar (20 - 25 kPa)
4. Disconnect the compressed air supply.
5. Wait for approx. 8-10 minutes. No pressure loss must
be detected.
If the compressed air is
significantly colder or
warmer than the gearbox to
be tested, a slight pressure
increase or decrease
respectively may occur. This
is quite normal.
6. Was any pressure drop evident?
Localize the leak as detailed below.
Remove the leakdown tester, and refit the oil plug.
The test is complete.
7. Spray suspected leak areas with leak detection
spray .
Bubbles indicate a leak.
Art. no. is specified above!
8. When the leak has been localized: take the
necessary measures to correct the leak.
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