How to Replace a Car Lift Hydraulic Hose

On a 2-post lift the hydraulic hose runs from the pump, up the driver-side column, across the overhead beam, and down the passenger-side column to the second cylinder; sometimes a T union in the middle of the overhead feeds both sides. Hoses fail from rubbing against a cable or a piece of the overhead, from age — brittle covers and cracks near the crimp — or from a fitting that has been weeping for years. Knowing how to replace a car lift hydraulic hose is a straightforward job for a shop tech, as long as you bleed the pressure first and route the new hose so it cannot rub. Order by outer diameter and by fitting type: the OD determines which crimp die set fits, and the fitting has to match what is already on the lift.

Tools and prep

Have ready: the correct replacement hose and fittings (verified against the OD and the pump and cylinder ends), metal plugs for the open hose ends, a drain pan, side cutters, wrenches, replacement copper bleeder washers, a bleeder wrench (often 16mm hex or an Allen key), zip ties and hose clamps, and protective sleeve for sharp edges. Make the lift safe first: lower it all the way down and hold the lowering valve for 10 seconds to release all pressure. Remove any hose clamps and zip ties, and make sure no customer vehicle is within 5 feet — if the hose has trapped fluid, you will spill some.

Step-by-step: how to replace a car lift hydraulic hose

1. Confirm the OD of the existing hose and that you have the correct replacement hose and fittings on hand, and that the fittings match the pump and the cylinder end.
2. With the lift down and pressure bled, detach the pump-side end of the hose first. If the lift has a T union in the middle of the overhead beam, detach the lower end going into the T first so it drains into a pan instead of down the top of the lift.
3. Place the detached end into the reservoir or a drain pan. Plug the pump-side end of the hose with a metal plug.
4. Detach the far end of the hose and drain it into the pan. Plug that end too, then pull the old hose out.
5. Measure the old hose and make the new hose to the same length. Crimp the fittings per the hose-making procedure for your crimper and die set.
6. Route the new hose so it does not rub cables or moving parts, and do not pinch it between the column base plate and the carriage.
7. Attach the pump-side end first, then the far end (or the T union side, depending on the lift). Watch the routing at sharp corners and do not overtighten the clamps.
8. Reinstall the hose clamps and zip ties.
9. Run the lift until the cylinders begin to raise, then bleed each cylinder: loosen the bleeder screw on top, let air out until a solid stream of oil comes, and close the bleeder. Replace the copper washer if it will not seal.
10. Clean up spilled fluid, lower the lift all the way, and top off the reservoir. Raise to max height for a second or two, look for leaks, and check for pinching or rubbing. Lower.

Fluid and oil

Clear fluid is ISO-32, red is Dexron ATF — match what the lift is running and do not mix. Bleeder washers are usually copper and get replaced when they compress out. Defer to the lift’s IOM for reservoir capacity; top off to the full line with the lift all the way down.

How to tell it’s time to replace

Replace a hose when the cover is cracked or brittle, when there is weeping near a crimp or fitting, when a clamp has bitten a groove into it, or when it has rubbed thin against a cable or the overhead. While the hose is off, add a wrap of protective sleeve wherever the new hose crosses a sharp edge; check the fittings and copper washers and replace any that are pitted or crushed; check the cylinder bleeder screws and replace the washer or screw if a bleeder will not seal; and back off or replace any hose clamp that has grooved the old hose. Knowing how to replace a car lift hydraulic hose also means fixing the reason the old one failed — a fresh hose routed against the same sharp edge fails the same way.

Safety

Bleed pressure for 10 seconds before you crack a fitting. Skip that and the hose sprays fluid several feet. Keep vehicles and people clear of the drain zone while you break the ends loose, and never route a new hose where it can rub a cable or moving part. When you understand how to replace a car lift hydraulic hose, the finish check — max height, look for leaks, look for rubbing — is what keeps the repair from becoming a comeback.

Common mistakes and how we avoid them

Two mistakes account for most hose comebacks. The first is skipping the bleed: crack a fitting on a lift that still holds pressure and it sprays fluid several feet. Ten seconds on the lowering valve, every time. The second is routing the new hose against the same sharp edge or cable that killed the old one — a fresh hose fails the exact same way in another year. Part of knowing how to replace a car lift hydraulic hose is fixing the cause: add protective sleeve at every edge crossing and confirm nothing rubs at full height. The bleed sequence at each cylinder matters too; air left in the line makes the lift feel spongy and lift unevenly, so bleed until you get a solid stream of oil with no bubbles.

We do this every week — how to replace a car lift hydraulic hose is a job our field techs run in customer shops across the region, not a procedure we read out of a manual. If you get partway in and something does not match what you see, or a part looks wrong before you commit to it, call us at 800-674-9302 and we will walk it with you. When you are ready to order, find the exact parts for your lift in our parts lookup so you get the right fit the first time and finish the job in one trip.