How to Replace Car Lift Sheaves

Sheaves are the grooved pulleys the equalizer cables ride over — two per column on a 2-post lift, one at the top and one at the base. When a sheave wears its groove oversize, cracks, or the bushing pushes out the side, the cable no longer tracks straight and starts cording. A wobble you can feel with your hand is a sign the bushing is done. Sheaves are cheap; a cable destroyed by a bad sheave is not, which is the whole reason knowing how to replace car lift sheaves pays off. This is an approachable job, but the upper sheave lives on an overhead beam — drop it on the concrete and it is done — so control of the part while you drive the pin is the skill that matters.

Tools and prep

Have ready: a Phillips or impact screwdriver for access covers, a hammer and punch for the sheave pins, sandpaper, anti-seize, replacement e-clips or cotter keys, the correct sheaves, and a helper for the overhead work. Make the lift safe first: set it on the locks so pressure is off the cables, then detach one end of each equalizer cable so the cables can be lifted off the sheaves. Work with the cables slack, not under tension.

Step-by-step: how to replace car lift sheaves

1. With one end of each cable detached, identify which sheave or sheaves are bad. Wobble-check by hand while the lift is on the locks and pressure is off the cables. Look for scoring in the groove and copper-colored bushings pushed out the side.
2. For a lower sheave: remove the access cover if there is one — Phillips-head screws, use an impact screwdriver if they are seized. Pull the e-clip or cotter key from the sheave pin. Slide the old sheave off.
3. Compare the old sheave to the new one. Sand the sheave pin lightly by hand with a piece of sandpaper. Anti-seize the pin. Install the new sheave with the bushing side facing the outer edge of the overhead beam — that way the bushing has metal on the outside if it starts to walk out.
4. For an upper sheave: place the cables between the two upper sheaves on the pin, then remove the retention hardware and drive the pin out with a hammer and punch. Do not mushroom the pin end. Hold the sheave the whole time so it cannot fall.
5. Compare, anti-seize, and reinstall the upper sheave, putting every spacer, washer, and e-clip back in the same order you took them off. A typical order is: sheave, washer, e-clip, spacer, e-clip, washer, sheave.
6. Reinstall the equalizer cables, lower the lift, and check cable tension per the cable-adjust procedure.
7. Raise the lift. Both locks should click at the same time. If not, adjust the cables. If you cannot get both locks to hit together, the concrete under one column may need shimming and grouting.
8. Cycle the lift all the way up and all the way down. Listen for squeaks or grinding — either means a sheave or cable is not seated right.

How to tell it’s time to replace

A sheave is done when it wobbles by hand, when the groove is worn oversize or scored, when the body is cracked or chipped, or when the bushing has pushed out the side. Because a bad sheave usually kills the cable riding on it, inspect that cable at the same time — if it is cording where it turns the bad sheave, plan on the cable too. Also check the sheave pins (light sanding and anti-seize on reinstall), the retention hardware (e-clips, cotter keys, and spacers all reused in the same order), and the lock ladders and pawls while the column is open. Knowing how to replace car lift sheaves is often the cheapest way to protect a fresh cable set.

Safety

Hold the sheave when you drive the pin out — a sheave that drops from an overhead beam onto a concrete floor is done, and the drop can crack the housing too. Work with the cables slack and the lift on its locks so nothing is under tension while your hands are near the pin. When you know how to replace car lift sheaves, the finish is a full up-and-down cycle with your ears open: a quiet lift is a correctly seated one.

Common mistakes and how we avoid them

The mistake that ends a sheave job badly is dropping the upper sheave off the overhead beam while driving the pin — the impact on concrete can crack the housing and it is instantly scrap. Keep a hand on it the whole time. The second common miss when learning how to replace car lift sheaves is losing the stack order on the upper pin; every spacer, washer, and e-clip goes back exactly as it came off, so lay them out in sequence as you remove them. The third is installing the new sheave with the bushing facing the wrong way — the bushing side goes toward the outer edge of the beam so it has metal on the outside if it starts to walk out.

Finally, remember the reason you are here: a bad sheave usually kills the cable riding on it. If the cable is cording where it turned the worn sheave, plan on replacing that cable too, because a fresh sheave against a chewed-up cable is a half-finished repair. Knowing how to replace car lift sheaves and catching the cable in the same visit is what keeps the lift out of your bay for another few years.

We do this every week — how to replace car lift sheaves 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.