Gear retraction issue

[Galvine]

So a follow up on my gear issue (1978 P337H)
I’m still having the exact same issue a year later ( it did work for about 5-6 months but then same issue)

It always works normal in the shop on jacks so it’s been hard to pinpoint

We have replaced ( overhauled ) the gear power pack, all the limit switches etc, just rebuilt the “accumulator” under the floor board

And same issue
Basically, first flight of day, select gear up, green light goes out, and gear doesn’t move
Select gear down ( still no green light ), pump the emergency handle 2x, and gear green light comes back on. Then select up again, and gear cycles normal. And will work normal over and over on that flight if needed ( ie multiple
Approaches etc)

Again, in the shop on jacks, they have never been able to reproduce it. Not once.
And its been in the shop off and on for a year maybe 7-8X looking at this problem

Any more suggestions appreciated

Thx

Greg