It sounds like you're low on oil. A slow leak has likely developed. There are other possible causes. Please contact your rigger or SAILTEC to discuss your service options.
SAILTEC, Inc. has specialized in designing and building hydraulic tension and rig control for sailboats and custom marine hydraulics since 1983. Our cost effective and durable hydraulic solution, coupled with a serious dedication to customer service and product support has made SAILTEC the first production boat source for many top sailboat brands for over twenty years.
We manufacture hydraulic/pneumatic cylinders, hand pumps, and 12V & 24V electric pumps that operate to 5000 psi (350 bar) and can generate up to 100 ton of force. Our latest products include hydraulic control of hatches, transom doors, swim platforms, keel lifting, radar lifts and other specialized applications.
It sounds like you're low on oil. A slow leak has likely developed. There are other possible causes. Please contact your rigger or SAILTEC to discuss your service options.