The Rotary FJ7820-1 lift arm component is the direct replacement for the Rotary lift it came off of. Cross-referenced as ALS-7545-46, 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-7545-46
- Brand: Rotary
- Type: Genuine OEM lift arm component
- Fits: SPO15, SPO15 300 Series, SPO18, SPO18 300 Series
- Lift type: 2-post 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.
- 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 (Adjustable) - Rotary SVI Exclusive
- Arm Restraint Gear (Not Adjustable) - Rotary N2122
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.
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-7545-46 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.
About this fj7820 outer swing
Sourcing the correct fj7820 outer swing is not the spot a shop wants to gamble. This piece sits inside a load path the lift manufacturer engineered to specific tolerances, and a substitute that looks close but is off by even a small margin can transfer load onto a neighboring component that was not designed for it. We stock this exact part to the OEM specification the original manufacturer publishes, which is why techs who have been through a bad aftermarket cycle keep coming back to us for the same replacement whenever their next need comes up.
Technical specification & installation notes
Torque and installation notes for this component follow the manufacturer's service manual. Where a torque value is called out, use a calibrated torque wrench and follow the tightening sequence the manual publishes for that fastener location — many lift assemblies require star-pattern or crosswise tightening to distribute load evenly. Skipping that step is one of the most common reasons a correctly-sourced fj7820 outer swing still ends up needing to be re-serviced within a year. Our tech line at 800-674-9302 will walk your installer through the procedure if the shop does not have the current service manual on hand.
Shipping & ordering
Shipping runs 3-5 business days on standard ground to the lower 48 states. Expedited overnight and two-day options are available; call 800-674-9302 before ordering to quote expedited freight. We stock the fj7820 outer swing in Iowa and ship same-day for orders confirmed before 2 PM Central. Orders that come in later than that or on a Friday afternoon pick up on the next business day. A tracking number gets emailed to the address on the order the moment the package leaves our dock.
Warranty coverage
Return policy on the fj7820 outer swing follows our store-wide standard: all parts sales are final; exchanges only if the piece arrives defective. In the case of a defective delivery, ship the failed piece back to us at your cost, we verify the defect on receipt, and ship a replacement at ours. Wrong-item deliveries where we made the shipping error follow a different path — we reimburse the return shipping cost and cover freight on the correct part. Contact [email protected] with the order number to start either process.
Cross-reference & fitment
Fitment on the fj7820 outer swing is verified against the lift serial number when the order comes in. Even inside one manufacturer's catalog, a lift model built in one production year can carry subtle revisions from the same model built two or three years later. Sending us the lift serial number when you place the order — either in the order notes or in a follow-up email — lets us verify the piece against that specific serial's parts list. That five-minute step catches revision mismatches before shipping and prevents the delay of an incorrect delivery.
Questions about the fj7820 outer swing? Call our parts desk at 800-674-9302 or email [email protected]. We ship nationwide from our Iowa warehouse and answer fitment questions within one business day.
Outer RF/LR Swing Arm - Rotary FJ7820-1
Parts that fit your lift
This Rotary part fits the lift models below. Click your model to see every part that fits it — handy for grabbing the wear items that usually go at the same time (cables, sheaves, pins, locks).
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