Hydraulic Cylinder & Seal Guides
Use these guides when you need more context than a calculator can give. Each one starts from a real symptom or workshop decision, then points to the checks that can prevent a wrong repair.
Hydraulic Cylinder Leaking From the Rod: What to Check First
A practical inspection order for oil leaking around a hydraulic cylinder rod, including rod damage, guide wear, seal installation and material issues.
Read guide →Troubleshooting guideHydraulic Cylinder Drifting Under Load: Cylinder or Valve?
How to separate piston-seal bypass from valve leakage when a hydraulic cylinder slowly moves or a load creeps after the control is centered.
Read guide →Troubleshooting guideNew Hydraulic Seal Keeps Leaking? Find the Cause Before Resealing Again
Why a freshly replaced hydraulic seal can leak again: rod damage, side load, contamination, installation cuts, wrong profile, material or gland geometry.
Read guide →Troubleshooting guideHydraulic Cylinder Weak or Won’t Lift: Pressure, Bypass or Load?
A practical way to separate low system pressure, internal cylinder bypass, upstream valve/pump issues and mechanical overload when a cylinder feels weak.
Read guide →Troubleshooting guideInternal Piston Seal Bypass: Signs, Tests and What It Can Be Confused With
Understand internal hydraulic cylinder bypass, its symptoms, and why cylinder drift alone does not prove the piston seal has failed.
Read guide →Troubleshooting guideScratched Hydraulic Cylinder Rod: Reseal, Repair or Replace?
How rod scoring, pitting and corrosion affect rod seals, what to inspect, and why a new seal alone may not fix a damaged hydraulic cylinder rod.
Read guide →Troubleshooting guideHow to Measure a Hydraulic Seal Without Guessing the Size
How to measure hydraulic rod, piston and wiper seals using ID, OD and height, and why gland, rod and bore measurements matter more than a distorted old seal.
Read guide →Troubleshooting guidePU vs NBR Hydraulic Seals: Which One Fits the Job?
Compare polyurethane (PU) and nitrile rubber (NBR) for hydraulic seals by wear, extrusion resistance, flexibility, temperature, fluid and application.
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