The Rotary T120220 lift arm component is the direct replacement for the Rotary lift it came off of. Cross-referenced as ALS-9786-43A, 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 lift arm component 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-9786-43A
• Brand: Rotary
• Type: Genuine OEM lift arm component
• Fits: SL210, SL212
• Lift type: inground lift

The restraint gear on a 2-post lift is the toothed gear that engages when the lifting arm swings in under load, locking the arm at whatever angle the tech set it to. When teeth wear round, chip, or the pawl gear that engages into the restraint gear loses its point, the arm can swing under load — and a swung arm with a vehicle on it drops the vehicle. Any restraint gear that will not positively catch the arm under light hand pressure needs to come off, whether the teeth look okay or not.

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.

• Outer Arm - Blue - Rotary T120151
• Outer Arm - Red - Rotary T120151
• Arm Pin - Rotary T120153
• **Short Inner Arm Assy. (Flip-Up Adapters) - Yellow - Rotary T120220
• **Long Inner Arm Assy. (Flip-Up Adapters) - Blue - Rotary T120219
• **Long Inner Arm Assy. (Flip-Up Adapters) - Yellow - Rotary T120219

Check your lift's serial before ordering

The most common reason a lift part comes back is not a defect — it is a revision mismatch. Manufacturers change sub-parts between production runs while keeping the same lift model name, so "it fits my lift model" is not always enough. The model plate carries the serial number that pins your lift to a specific run, and that is the number that settles which version of this part belongs on your lift.

Can't find the plate? Measure the old part — overall length, bolt-hole spacing, thread size on anything threaded — and photograph it from a couple of angles. Send that with your lift's brand and rough age and we will match it against the parts breakdowns we service from every week.

Also inspect

• Arm pin — if you had a bad restraint gear you may also have a mushroomed or grooved arm pin
• Foot-pad rubber — intact, securely attached
• Return spring on the pawl
• Arm itself — broken welds, cracks, severe rust

A restraint gear that will not engage is a lift that is unsafe to load. Do not put a vehicle on the lift until you confirm both arms lock positively under hand pressure.

Why buy your Rotary lift arm component from Auto Lift Services

We install, inspect, and repair Rotary lifts every week — the ALS-9786-43A 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.