[Healeys] BN6 Overdrive

[Neil McDonald]

Yesterday I wrote "I have concluded that the most likely cause of my problems are low OD fluid levels and/or inadequate opening of the actuating valve. Both I can  readily deal with."

In off line discussions with Steve Byers I have added a third and ominous possibility, a defective accumulator. The good hydraulic pressure already confirmed only indicates that the pump is OK because testing was not done while trying to engage the OD. My understanding is that OD engagement is the accumulator's function and the pump's role is to pressurise the accumulator for this task before OD engagement. A definitive test of accumulator condition seems to be how well it holds pressure after the engine is switched off! 
_____________________
Neil McDonald

Email: nmcd10 at gmail.com

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