[Healeys] overdrive problem

[healeymanjim]

is there such a thing as a stuck accumulator in the overdrive?   a few weeks ago we changed the gasket on the side of the 
case that houses the solenoid and arm.  have been unable to get o/d to engage electrically ever since.  the solenoid is new 
and works perfectly as long as the overdrive mainshaft is not turning.  it tries to move the arm but is unable.  pushing on 
the right side shaft lever for a second or two will engage the o/d and it will stay in o/d until the o/d switch is returned to 
normal.   it is like the accumulator has no pressure and does not give the boost to engage the o/d.  can the accumulator be 
removed without damaging it?  it had MT 90 oil in it which we replaced with 30ND hoping to stop any more leaks but can 
put it back in if it would help.  any assistance welcomed.