Industrial and agricultural equipment use hydraulic systems to lift implements, change the position of implements and assist in braking and steering. Safety precautions must be observed when repairing and maintaining hydraulic systems, as pressurised fluid can be more than 907 Kilogram per square inch (psi).
Before working on a hydraulic system, shut off the engine, set the break and block up raised units. Remove cylinders when the unit is resting on the ground and relieve hydraulic pressure before disconnecting the oil lines.
Maintain the hydraulic system by regularly checking for worn hoses and oil leaks and by frequently replacing filters. Use protective lubricants to coat cylinder rods to avoid rusting. Use a nonvolatile cleaning solution to wash parts. Keep pressure relief valves clean and periodically tested. Repair external leaks immediately.
Never cross hydraulic lines and make sure the lines are not damaged and all connections are tight. Lower hydraulic units before leaving the machine and lock cylinder tops during transportation. Before removing heavy hydraulic pumps, valves and motors, support with a floor jack, chain hoist or blocks. Use appropriate safety guards to cover all belts and shafts. Carefully store and handle hydraulic fluid to keep out dirt and moisture. Avoid getting hydraulic fluid on hands or body.