Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.

Shuttle valves and the main solenoid valve block are fully disassembled, cleaned, and rebuilt. New seals and O-rings are installed to restore proper hydraulic function. #HydraulicRepair #ExcavatorRepa ...