ABB M2000 Reference Manual

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ABB M2000 Reference Manual Manual pdf 23 page image

1 Reference information1.8. Performing a leak-down test213HAC023297-001 Revision: A1.8. Performing a leak-down testGeneralAfter refitting any motor and any gearbox, the integrity of all seals enclosing the gearbox oilmust be tested. This is done in a leak-down test.Required equipmentProcedureEquipment, etc. Art. no. NoteLeakdown tester 3HAC 0207-1Leak detection spray -Step Action Note/Illustration1. Finish the refitting procedure of the motor or gear inquestion.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 theleakdown tester kit.Art. no. is specified above!3. Apply compressed air, and raise the pressure with theknob until the correct value is shown on themanometer.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 mustbe detected.If the compressed air issignificantly colder orwarmer than the gearbox tobe tested, a slight pressureincrease or decreaserespectively may occur. Thisis 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 detectionspray .Bubbles indicate a leak.Art. no. is specified above!8. When the leak has been localized: take thenecessary measures to correct the leak.