OSH Answers Fact Sheets
Easy-to-read, question-and-answer fact sheets covering a wide range of workplace health and safety topics, from hazards to diseases to ergonomics to workplace promotion. MORE ABOUT >
What should I know about using hydraulics?
Improperly maintained or adjusted hydraulic parts can cause serious injury.
Always use caution when working on a hydraulic system. Even when the system is shut down, hydraulic oil can still be under pressure.
If the controls for more than one lift are in one location, they should be numbered or colour-coded to ensure operators know which control operates each individual lift.
- Lower hydraulically powered attachments to the ground, or support them on metal stands or blocks.
- Shut off the engine that powers the hydraulic pump.
- Move the hydraulic lever back and forth a few times to release pressure.
- Lock out levers and power switches so the hydraulic system cannot be started while someone is doing repairs.
- Let the hydraulic system cool down.
- Follow manufacturer's instructions. Servicing procedures vary from one hydraulic system to another.
Hydraulic fluid escaping through pinhole leaks is difficult to see but its high pressure can puncture your skin. Have a physician treat any hydraulic fluid skin punctures immediately.
- Check for leaks by passing a piece of cardboard or wood over the suspected area.
- Store hydraulic fluids away from sparks or flames.
- Clean up spills immediately.
- Do not smoke in autobody area.
- Do not use your hands to search for leaks. Hydraulic fluid can pierce the skin and "small" injuries can have serious consequences. Get medical help immediately.
What should I know before using hydraulic lifts?
- Only people properly trained in the use of hydraulic lifts and the positioning vehicles on lifts should use hydraulic lifts.
- Customers and other unauthorized people should not be in the work area.
- Make sure that "dead stick" type controls return to the neutral or "off" position when released.
- Ensure that the hydraulic pressure does not exceed the recommended level.
- Use lift only for the job for which it was designed.
- Inspect and service controls and equipment regularly according to manufacturer's instructions.
- Check packing nuts and surface bolts around cylinders on hydraulic hoists as recommended in manufacturer's manual.
- Inspect pistons for dirt, damage or other abnormal conditions regularly.
- Lubricate the hoist and check for the tightness of fasteners.
- Check the hydraulic fluid level at least every second month. Change hydraulic oil according to manufacturer's directions (frequency, type of oil, etc.).
- Check cables, lift pads and adaptors for wear.
- Ensure surface mounted lifts are anchored appropriately. Inspect the anchor bolts and the floor for cracks.
- Check for bent arms, cracks in welds or damage or wear.
- Replace damaged parts with those recommended by lift manufacturer.
- Only properly trained lift service personnel should repair hydraulic lifts.
- Use lift adaptors designed for contact on the lifts.
- Ensure that the lift area is clean and free of oil, tools, equipment, hoses, wires, etc. before a car or truck is driven into the work area.
- Make sure that the weight of the vehicle does not exceed the lift capacity of the hydraulic lift.
- Know how to find the centre of gravity of the vehicle and where to position the vehicle on the lift.
- Check the vehicle's lifting points vehicle recommended by the manufacturer to examine for rust, damage or oil.
When should I not use a hydraulic lift?
Do not use the lift if it:
- Raises very quickly.
- Jerks or jumps when raised.
- Slowly settles down after being raised.
- Slowly rises, either when in use or when not in use.
- Comes down very slowly.
- Blows oil out of the exhaust line.
- Leaks oil at connections.
Although every effort is made to ensure the accuracy, currency and completeness of the information, CCOHS does not guarantee, warrant, represent or undertake that the information provided is correct, accurate or current. CCOHS is not liable for any loss, claim, or demand arising directly or indirectly from any use or reliance upon the information.