The Rotary ALS-7545-16A is the direct-replacement arm restraint gear for the Rotary lift it came off of — the genuine part, same fit and same working specification as the one already on your lift. Ordering the Rotary arm restraint gear 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-7545-16A
• Brand: Rotary
• Type: Genuine OEM arm restraint gear
• Fits: A10i, A10i EH-1, A10i EH-2, S10i, S10i EH-1, S10i EH-2, S10i EH-4, SPO10, SPO12 EH-1, SPO12 EH-2, SPO15 300 Series, SPO18 300 Series
• Lift type: 2-post lift

Locks fail two ways, and both are dangerous. The pawl can stick — gummed with grease and grit, or a weak return spring — so it doesn't drop into the ladder when it should. Or the ladder teeth and pawl nose wear rounded, so the pawl won't hold and can skip under load. A lock that doesn't engage, or engages and won't hold, defeats the one part standing between a raised vehicle and the floor.

The lock ladder is the toothed steel rail bolted inside each column that the pawl climbs and catches on. Its job is simple and absolute: give the pawl a square, full-depth tooth to rest the load on at every height. When the teeth round over, chip, or the ladder loosens on its mounts, the pawl no longer has a solid shelf to sit on — and a pawl resting on a half-worn tooth is a lift resting on nothing you'd want to trust.

What lifts this arm restraint gear fits

This arm restraint gear fits the lift models below. Click a model to open its visual parts breakdown — the exploded drawing with every part numbered, so you can confirm this is the right part for your exact lift before you order.

• A10I — see the exploded parts breakdown for this lift
• S10I — see the exploded parts breakdown for this lift
• SPO10 — see the exploded parts breakdown for this lift
• SPO12 — see the exploded parts breakdown for this lift

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.

• Arm Restraint Engage Gear - Rotary N2121
• Outer Rear Swing Arm - Rotary N2150-1
• Inner Rear Swing Arm Kit - Rotary N2103-1
• Arm Swivel Pin - Rotary N2154
• Arm Restraint Gear (Not Adjustable) - Rotary N2122
• Outer Rear Swing Arm - Rotary N2151-1

Replacing your arm restraint gear

Swapping restraint gear or a safety latch is about restoring the positive stop that catches the load if something upstream lets go. Install the part, then trip it by hand and under the lift's own weight to confirm it deploys fully and clears on release. This is safety-critical hardware, so the step-by-step procedure is worth following start to finish. Full step-by-step: how to replace lift arm restraint gears.

Find the right part for your lift

If you are not sure this part matches your setup, the fastest check is the visual breakdown: open our Rotary parts lookup, pick your model, and match your part against the drawing where every item is numbered. Can't read the model plate? our guide to finding your model number shows exactly where it lives on each lift type, and we are a phone call away if you would rather have us confirm it.

Signs the locking system needs attention

Check the return springs and pivots. A stretched, rusted, or broken spring won't snap the pawl home; a corroded pivot binds it. Look for surface rust locking the mechanism, missing or damaged springs, and pins worn loose in their bores. The pawl only protects the lift if it drops fast and sits deep — anything slowing that motion is a defect, not a quirk.

Parts commonly replaced at the same time

The parts around a lock failure share its wear: a rounded latch usually rides with a tired spring and a stretched release cable. Do them together on both columns so the lift locks in step. Tell us your model and serial and we will pull the complete lock hardware set.

Safety notes

Locks are the redundancy that makes a lift safe to stand under, so treat any lock problem as urgent. If teeth are rounded, a pawl sticks, or the release cable is frayed, fix it before the next vehicle. Confirm synchronized engagement and clean release on both sides, and never bypass a balky lock to buy time.

Before you order

Order lock parts by model and serial, not by guess — the hardware changed across production runs. Since both sides should lock in step, plan to replace in pairs, and bundle the release cable if it is worn. We will match the correct latch, pawl, and spring set for your lift.

Ordering the right revision

Before this goes in the cart, grab two things off your lift: the model number and the serial number, both on the manufacturer's plate. The serial matters more than most people expect — lift makers revise components between production runs without renaming the lift, and the run your serial falls in determines which revision of this part is correct.

If you are working from a failed part rather than a plate, measure what you have and photograph how it mounts. Send that to us along with the lift brand, and we will check it against the same parts breakdowns our own techs use in the field before you commit to the order.

Why buy your Rotary arm restraint gear from Auto Lift Services

We install, inspect, and repair Rotary lifts every week — the ALS-7545-16A 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 — and every part ships genuine, no aftermarket substitution unless you ask for it.