The Rotary 41556 replacement hardware is the direct replacement for the Rotary lift it came off of. Cross-referenced as ALS-7520-66, 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 hardware 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-7520-66
- Brand: Rotary
- Type: Genuine OEM replacement hardware
Hardware is where lift failures are born. A pin that has worn oval lets its sheave run crooked; the crooked sheave saws at the cable; and a five-dollar pin has now written a quote for cables and sheaves. Springs lose tension and a lock pawl stops returning. A bushing thins out and the clunk everyone ignores becomes the slop that rounds off the bore it sits in. None of these parts fail dramatically — they just get a little loose, a little rounder, a little weaker, and pass the damage up to whatever they located or supported. Replacing hardware at the first sign of wear is how the expensive parts on a lift get to live out their full lives.
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.
- 3/4"-10NC Hex Nut - Rotary 40760
- 7/8"-9 Hex Nut - Rotary 40765
- Quick Release Pin SM7, SMXLT7 - Rotary - S130111
- 7/8"-9 Jam Nut SM7, SMXLT7 - Rotary - 40766
- 1/8" x 1-15/16" Hair Cotter Pin - Rotary - 41169
- Hex Head Bolt SM7, SMXLT7 - Rotary - 41539
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.
When hardware comes out, read it. An ovaled pin means its bore is probably ovaled too — check the hole, not just the pin. A stretched spring means something was binding for it to fight. Bright metal dust around a bushing or bearing means it has been grinding, so inspect what it rides in. New hardware in a worn bore is a short-term repair with a long-term invoice.
Never reuse a bent pin, a stretched spring, or a mushroomed piece of hardware because it still technically fits — and never substitute generic hardware-store fasteners for load-bearing lift hardware. Grade and dimensions exist for a reason on a machine that holds vehicles in the air.
Why buy your Rotary replacement hardware from Auto Lift Services
We install, inspect, and repair Rotary lifts every week — the ALS-7520-66 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 sm7 nylon insert
The sm7 nylon insert is a direct-fit replacement engineered to restore original manufacturer performance on the lift model it services. Every piece we ship carries the exact dimensional and material specifications the OEM published for that application. Fitment on this component is critical: it interfaces with adjacent hardware in ways that any deviation from spec can drive premature wear on nearby parts or trigger the lift's mechanical safety systems into an unexpected condition. Shops that source this from us instead of a generic aftermarket substitute consistently report zero fitment issues on first-time installation.
Technical specification & installation notes
Technical specification matches the OEM published dimensions to within manufacturing tolerance. When a shop installs the sm7 nylon insert correctly, the lift returns to factory-rated performance immediately — no break-in period, no cycle-count adjustment required. The lift's safety systems (mechanical locks, hydraulic pressure relief, and electrical interlocks) treat a correctly-installed replacement exactly as they would treat a factory-original component during initial commissioning. That parity is what lets us honor warranty coverage without asking for the lift's full operating history.
Shipping & ordering
Freight covers the continental United States on all standard orders. We ship UPS or FedEx ground for parts under 30 lb; heavier assemblies quote at published carrier rates. International orders on the sm7 nylon insert require a freight quote — email dimensions, weight, and destination country to [email protected] and we return a rate within one business day. Alaska, Hawaii, and US territories quote at published rates and typically take five to ten business days depending on carrier and destination.
Warranty coverage
Consumables and wear parts like this are covered under the manufacturer defect warranty for twelve months. Because the sm7 nylon insert is a component that eventually needs replacement in normal operation, warranty coverage specifically addresses failure due to manufacturing defect, not failure due to normal end-of-life wear. Our team can help distinguish between the two on a phone call if there is any question after installation — call 800-674-9302 and describe the failure pattern; we will tell you honestly whether it looks like a warranty case.
Cross-reference & fitment
Alternate applications for the sm7 nylon insert sometimes exist. Where a common part fits multiple lift models across a manufacturer's catalog, cross-reference sheets show the compatible models explicitly. If you are consolidating parts stock and want to know which of your lifts the piece covers, email the request to [email protected] with a list of the lift models in your bay — we return a compatibility grid showing which lifts accept the replacement and which need a different number.
Questions about the sm7 nylon insert? 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.
Nylon Insert Hex Lock Nut SM7, SMXLT7 - Rotary - 41556
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