10/14/2026
🔧 DID YOU KNOW? A HYDRAULIC CYLINDER CAN FAIL FOR HUNDREDS OF DIFFERENT REASONS!
Most people assume that when a hydraulic cylinder starts leaking, it just needs new seal. But what caused those seals to fail in the first place?
đź”´ HYDRAULIC SYSTEM PROBLEMS
* Excessive hydraulic pressure
* Sudden pressure spikes
* Hydraulic shock
* Improper relief valve settings
* Excessive backpressure
* Hydraulic oil overheating
* Cavitation and air in the system
* Malfunctioning control valves
đź”´ PISTON ROD PROBLEMS
* Bent or twisted rods
* Scratched or scored chrome
* Rust and corrosion
* Pitted chrome
* Peeling or flaking chrome
* Worn or undersized rods
* Improper rod surface finish
* Damaged rod threads
* Cracked or broken rod ends
đź”´ CYLINDER BARREL PROBLEMS
* Scratched or scored cylinder walls
* Rust or pitting inside the barrel
* Excessive internal wear
* Out-of-round cylinder bores
* Tapered cylinder bores
* Improper bore surface finish
* Cracked or distorted barrels
* Damaged welds
* Internal contamination
đź”´ PISTON & GLAND PROBLEMS
* Worn piston wear rings
* Damaged piston grooves
* Loose piston retaining nuts
* Worn gland bushings
* Excessive gland clearance
* Damaged seal grooves
* Cracked pistons or glands
* Metal-to-metal contact
* Improperly machined components
đź”´ SEAL FAILURES
* Incorrect seal material
* Incorrect seal size
* Improper seal installation
* Seal extrusion
* Hardened or brittle seals
* Excessive seal friction
* Heat-damaged seals
* Chemical deterioration
* Seal damage from contamination
* Incorrect seal groove dimensions
đź”´ EQUIPMENT & OPERATOR PROBLEMS
* Worn mounting pins
* Worn bushings
* Misaligned mounting points
* Excessive side loading
* Overloading equipment
* Repeatedly bottoming out cylinders
* Bent equipment linkage
* Improper cylinder installation
* Using cylinders beyond their rated capacity
đź”´ HYDRAULIC OIL & CONTAMINATION
* Dirty hydraulic oil
* Water contamination
* Metal particles
* Incorrect hydraulic fluid
* Inadequate filtration
* Degraded hydraulic oil
* Contaminated hoses and fittings
* Lack of proper lubrication
đź”´ IMPROPER REPAIRS
* Replacing seals without inspecting components
* Reusing worn or damaged parts
* Failing to measure critical tolerances
* Incorrect seal kits
* Improper honing
* Incorrect machining
* Improper assembly
* Failure to identify the original cause of failure
⚠️ HERE’S THE IMPORTANT PART:
A leaking seal is often the RESULT of a problem, not the CAUSE of the problem.
You can install brand-new seals in a cylinder with a damaged rod, worn gland, or scored barrel, and the underlying problem will still be there.
That’s why there’s a difference between REPLACING SEALS and PROPERLY REPAIRING A HYDRAULIC CYLINDER.
At Blount Cylinder Repair, we believe in identifying the problem, explaining what we find, and recommending the repairs necessary to correct it.
