Lorn and those of you whom have had the hydraulic pump serviced, what symptoms did you have to indicate this was necessary?

Over a year ago I had problems with a nose gear door fully open in flight, the symptom of which was an aerodynamic " buzzing " noise from the front of the aircraft. It was suggested that perhaps I had the reversed spool valve problem. I pulled the pump apart and found no spool valve inside. I cannabalised my old pump and installed a spool valve in the new pump. The problem was solved.

Unfortunately I am again getting an buzzing noise/vibration (only worse) above 130kts, which I suspect is a nose gear door partially ajar in flight. I thought it may be the exhaust vibrating, however this was tightened and the noise persists.

 I wonder would the valve which had been present in the old pump for over 10 years have finally deteriorated or started to deteriorate?

So what symptoms have people had in old pumps?

Also the contact I pulled from the archives for Oildyne was Edward Van Hecke..is he still "the man"

Getting frustrated with noise

Gerard O Connell
Melbourne, Australia
VH-LPD (LNC2)

 

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