hydraulic levers

i have a super c that the hydraulic levers are very hard to move. it is only in the pedestal as i have disconnected the linkage and it is still very hard. is there an easy way to free these up, or do i need to tear it all apart? i have tried penetrating oil but it only temporary.
 
Don't lube too much ...I have trouble with mine slipping because I lubed it and don't use the side tilt enough to take it apart and clean it.
 
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