Hydraulic Valve Repair & Power Unit Service
Mercury Hydraulics repairs and rebuilds hydraulic directional control valves, relief valves, proportional valves, and complete hydraulic power units (HPUs). Spool polishing, valve body repair, custom HPU builds, and full system testing — all in Melbourne, FL.
Hydraulic Valve Repair & Rebuilding
Hydraulic valves are the control center of any hydraulic system. When a directional control valve sticks, a relief valve fails to hold pressure, or a proportional valve loses responsiveness, the entire system becomes unreliable or inoperable. Mercury Hydraulics diagnoses and repairs hydraulic valves of all types, restoring precise control and reliable performance.
Our valve repair process begins with a complete disassembly and inspection. We measure spool-to-bore clearances, inspect for scoring and wear, test spring rates, and evaluate sealing surfaces. Worn spools are polished or replaced. Scored valve bodies are evaluated for repair or replacement. Every rebuilt valve is bench-tested before return to service.
Directional Control Valves
Spool valves, poppet valves, and cartridge valves that control the direction of hydraulic flow. We rebuild all types including mono-block, sectional, and cetop-mounted valves.
Relief Valves & Pressure Controls
System relief valves, sequence valves, counterbalance valves, and pressure-reducing valves. We test and set relief valves to exact pressure specifications.
Proportional & Servo Valves
Electrohydraulic proportional valves and servo valves require precision repair. We service proportional directional valves, proportional pressure controls, and servo valves.
Flow Control Valves
Needle valves, flow dividers, priority valves, and pressure-compensated flow controls. We repair and calibrate flow control valves to restore precise metering.
Check Valves & Pilot-Operated Checks
Ball check valves, poppet check valves, and pilot-operated check valves. We repair leaking check valves and replace worn seating surfaces.
Solenoid Valves & Coils
We test and replace hydraulic solenoid coils, repair solenoid valve bodies, and rebuild complete solenoid valve assemblies for all voltages and configurations.
Spool Polishing & Valve Body Repair
Valve spools operate with extremely tight clearances — often just 0.0002 to 0.0005 inches between the spool and bore. Contamination, wear, and corrosion can cause spools to stick, leak internally, or fail to shift completely. Mercury Hydraulics performs precision spool polishing to restore proper clearances and eliminate sticking without replacing the entire valve assembly.
For valve bodies with scored or worn bores, we evaluate whether the body can be salvaged through precision honing or whether replacement is more economical. In many cases, a polished spool and honed bore restore a valve to better-than-new performance at a fraction of the cost of a new valve.
All rebuilt valves are tested on our bench test equipment to verify proper shifting, pressure settings, and internal leakage before being returned to service.
Hydraulic Power Unit (HPU) Service & Custom Builds
A hydraulic power unit is the heart of any hydraulic system — combining a pump, motor, reservoir, valves, and filtration into a single integrated package. When an HPU fails, the entire system goes down. Mercury Hydraulics repairs existing HPUs and builds custom power units to any specification.
Our HPU services include complete disassembly and inspection, pump and motor rebuild, valve replacement and adjustment, reservoir cleaning and inspection, filter replacement, and full system testing before return to service. For custom HPU builds, we work from your specifications or design the system from scratch using SolidWorks CAD.
REQUEST A QUOTE
Get a fast quote — we'll call you back within the hour. For emergencies, call (321) 312-0689.
Warranty
All hydraulic valve rebuilds and HPU repairs performed by Mercury Hydraulics are backed by a 1-year workmanship warranty. If a repair fails due to our workmanship within 12 months, we fix it at no charge.
Warranty covers workmanship defects. Does not cover damage from contaminated fluid, system overpressure, or improper installation.
Valve Sticking? HPU Down?
Call Mercury Hydraulics. We diagnose, repair, and test hydraulic valves and power units with fast turnaround and a 1-year workmanship warranty.