Edwards A373-30-940

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Maintenance
A373-10-880 Issue R
5.11.6 The vacuum is not maintained after the pump is switched off
 The gas-ballast control is open.
 O-ring(s) are damaged or missing.
 The shaft seals have deteriorated.
5.11.7 The pumping speed is poor
 The connecting pipelines are too small in diameter.
 The connecting pipelines are too long.
 The inlet-filter is blocked.
5.11.8 There is an external oil leak
 The oil pump shaft seal is worn or damaged.
 The oil box gasket has deteriorated.
 There is an oil leak from gas-ballast control.
 There is an oil-leak from the drain-plug.