The Rotary FF251 replacement part is the direct replacement for the Rotary lift it came off of. Cross-referenced as ALS-9790-18, it is the genuine Rotary part — same part number, same fit, and same working specification as the one already on your lift. Ordering the Rotary replacement part from us gets you the OEM piece that matches the lift, not an aftermarket knock-off that is close but not the same.

Specifications

• Part number: ALS-9790-18
• Brand: Rotary
• Type: Genuine OEM replacement part

Do the math on a dead lift bay: a bay that bills steadily is producing hundreds of dollars a day, and the part holding it hostage is very often something small. That is the real cost equation on lift parts — not the price on this page, but the days between failure and repair. The shops that feel it worst are the ones that wait until a part strands a vehicle in the air on a Friday. Keeping the known wear items on hand, or ordering them the day symptoms show up, keeps a twenty-dollar part from charging you a week’s rent on the bay it shut down.

Related parts for this lift

The parts below are commonly ordered alongside this one — cables, sheaves, seals, and hardware wear on similar schedules, and most repairs go faster when the whole set is done in one visit.

• Rear Saddle - Rotary FF234
• Front Saddle Old 4-Hole 3/4" $ 1,626.90 $ 1,464.21 - Rotary - FF243
• Front Saddle - Rotary - FF231
• Front Saddle $ 1,414.02 $ 1,272.62 - Rotary - FF233
• Rear Saddle - Rotary - FF254YL FF254
• Front Saddle - Rotary - FF250

Not sure this fits? Here's how to check

Pull the number off your lift's model plate first — model and serial both. Manufacturers run mid-cycle revisions that keep the model name but change hardware, so two lifts with the same name on the column can take different parts. The serial is what removes the guesswork.

Second check: compare the old part against this listing before you order. Length, mounting pattern, and thread sizes tell most of the story. If anything doesn't line up, or if the old part is too worn or broken to measure, call us with photos — we work on these lifts every week and can usually confirm fit from a picture and the lift's serial faster than you can dig through a parts diagram.

While the lift is already apart, replace what is on the same clock. Parts that wear together should be replaced together — the labor of opening the lift up is the expensive half of the job, and doing it twice for two parts that could have shipped in one box is the most common money leak in lift maintenance. Check the mating parts, the hardware, and anything you had to disturb to get here.

Downtime pressure is exactly when shortcuts happen — the temporary fix, the not-quite-right part, the lock that gets bypassed for one job. Do not let a busy schedule talk you into running a lift in a condition you would flag on someone else’s equipment.

Why buy your Rotary replacement part from Auto Lift Services

We install, inspect, and repair Rotary lifts every week — the ALS-9790-18 is a part we handle in the shop, not a random SKU we drop-ship.

• The phone answers if you have a question mid-install — call 800-674-9302.
• We confirm the right part for your lift's serial and production year before you order.
• Every part ships as genuine Rotary — no aftermarket substitution unless you specifically ask for an aftermarket equivalent.

If you also need companion wear items — cables, sheaves, seals, hardware — for the same repair, use our parts lookup and we will build the whole kit for your lift so you order once and finish the job.