RCM for Hydraulic Cylinders

We conduct the RCM analysis with equipment operators, hydraulic maintenance technicians, and machine engineers. Cylinder functions are defined in operating context (extend/retract load at specified speed and force, maintain position under load, cushion end-of-stroke impact, contain hydraulic fluid). Failure modes are cataloged: piston seals (wear, extrusion, chemical attack, hardening), rod seals (wear, extrusion, rod wiper failure), rod (chrome wear, scoring from contamination, corrosion pitting, bending), bore (scoring from contamination or seal debris, corrosion, taper wear), cushion (wear, maladjustment, check valve failure), and mounting (pin wear, bushing clearance, clevis elongation, trunnion bearing wear). The JA1011 decision logic evaluates: cycle time or position drift monitoring as on-condition for internal leakage, external leak monitoring as on-condition for rod seal failure, rod surface visual inspection during extension as on-condition for chrome condition, mounting hardware inspection for wear and looseness, and cushion operation assessment through deceleration characteristics. Run-to-failure is accepted for non-critical cylinder applications where failure consequence is limited to replacement cost and planned downtime. Rebuild intervals for critical cylinders are justified by seal life data and operating environment severity.