The extend force of a cylinder in regeneration is equal to _________.

• A. Cap pressure times the rod
• B. Annular pressure times the cap area
• C. Pump pressure times the cap area
• D. 1/2 the cap area

Answer: (A)

In regeneration, the rod end fluid is redirected to the cap end, so the piston is driven to extend by cap-side pressure acting on the rod-facing area. The part that actually pushes the piston during extension is the rod area, not the full cap face. So the extend force is cap pressure multiplied by the rod’s cross-sectional area (F = p_cap × A_rod). The other options would require pressure acting on larger areas or from a different source, which isn’t how regeneration uses pressure and piston geometry.