Help-- Gear Problems (Hydraulic)

Sorry to say I haven't been much a follower of the message board for several months. Every thing working flawlessly logging 10-15 hrs a week! untill now. Hate to be that kind of guy... any-way glad your still here!!

Details... 1966/A 337 front pump only... After full fluid gear operates about 6 times flawlessly (10 sec. cycle time) after 6 cylces the gear will retract with all but the last door closing at which time gear handle stays up and all doors sag open, cyle gear down... no problems down and locked.
re-fill reservoir gear again operates with no problem 6 times. Corrective action so far has been replace all fluid, replace all lines, clean filter and yes belly is wet (red) no change in symptoms.

I hope some-one can help

Thanks again
Mel Smith (Guy with 3 children in T.C.pictures)