Hydraulic repair services rebuild, repair and calibrate used hydraulic components and equipment such as hydraulic pumps, valves and servo valves, cylinders, motors, jacks, rams, actuators, hydraulic power units (HPUs) and hydraulic machines or systems.  Companies differ in terms of product repair capabilities and services offered. Hydraulic repair services that rebuild, repair and calibrate specialized or proprietary hydraulic equipment are also available. Quality requirements for these organizations include ISO 17025 and ISO 9000, NCSL Z540-1, A2LA, AS9000 and QS9000, NIST and NVLAP. 

Hydraulic repair services can repair hydraulic accumulators, hydraulic cylinders, hydraulic hose, hydraulic jacks, hydraulic linear actuators, and hydraulic motors. Hydraulic accumulators use an incompressible fluid and a compressed gas, spring or raised mass to store energy, absorb shock, eliminate noise, and counter-balance loads. Hydraulic cylinders are actuation devices that utilize pressurized hydraulic fluid to produce linear motion and force. Hydraulic hose is specifically designed to convey hydraulic fluid to or among hydraulic components, valves, actuators, and tools. Hydraulic jacks are used for leveling or positioning heavy equipment, or for supporting structures. Hydraulic linear actuators use a cylinder and hydraulic fluid for motive force. Hydraulic repair services that fix hydraulic motors are also commonly available.  

Some hydraulic repair services specialize in the repair of hydraulic power units (HPUs), hydraulic pumps, hydraulic rams, hydraulic rotary actuators, hydraulic valves, or hydrostatic drives.  Hydraulic pumps deliver high-pressure fluid flow to the pump outlet. Hydraulic rams are water-powered cyclic pumps that use the energy of a large amount of water falling from a small height to lift a small amount of that water to a much greater height. Hydraulic rotary actuators use a pressurized, incompressible fluid to rotate mechanical components. Hydraulic valves contain and transfer the flow and pressure of hydraulic fluid in hydraulic power systems. Hydrostatic drives are often used as a power transmission in engines with a variable speed output. Typically, hydraulic repair services that rebuild, repair or recalibrate these devices also fix hydraulic motors. 

Hydraulic repair services may offer a wide range of services. Some companies provide bench repair, field repair, calibration, online documentation, installation or start-up, pick-up and delivery, or warranty repairs. Others offer preventative maintenance or service contracts, rapid turnaround times, remanufacturing, product replacements or exchanges, spare parts inventory, troubleshooting, or upgrades. Hydraulic repair services that offer unlisted, specialty or proprietary services are also available.