Restoring a Quick Coupler Piston — Precision Machining at Its Best!

#QSMechanics #quickcoupler #restoration This Volvo EW55B quick coupler hydraulic cylinder piston was completely worn and corroded — seal grooves destroyed, rod surface pitted, leaking hydraulic oil with every stroke, quick coupler unable to lock or release. Watch as I disassemble the cylinder, restore the piston rod surface on the lathe, re-machine all seal grooves to correct depth, fit a new seal kit throughout, reassemble and pressure-test the cylinder, and return the quick coupler to full locking and releasing function. 👍 LIKE if this restoration impressed you! 🔔 SUBSCRIBE for weekly excavator repair videos! 💬 COMMENT — Is your quick coupler cylinder leaking? #machining #ExcavatorRepair #HydraulicRepair #MetalWork #PrecisionMachining #satisfying