Amm/Pearson 4B40139 Spring — a direct-fit replacement replacement hardware. Ordering the 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-7105-20 Type: Genuine OEM replacement hardware On lift hardware, fit is the whole job. A pin is not a rod of roughly the right diameter — it is a specific length, a specific fit in its bore, and a specific way of being retained, whether that is an e-clip groove, a cotter key hole, or a shoulder. A bushing is a precise interference in its housing and a precise clearance on its shaft. Manufacturer-spec hardware carries all of those dimensions; the hardware-aisle stand-in carries some of them, and the missing ones become play, wobble, and premature wear. This is a spec-correct replacement for the assembly it belongs to — it goes in the way the original came out, retained the way the original was retained. Confirm this is the right part before you order Lift manufacturers revise parts mid-production without changing the model name, so the same lift bought two years apart can take two different revisions of the same component. Before you order, find the model plate on the lift — on most 2-post lifts it rides on one of the columns at eye level, on 4-post lifts it is usually on a column or the power-unit side runway — and note the full model number and serial. The serial dates the lift to a production run, and that is what decides which revision fits. If the plate is painted over or missing, take a photo of the part you are replacing next to a tape measure and send it to us. Between the dimensions, the mounting pattern, and what lift it came off of, we can almost always identify the exact part before you spend money on the wrong one. Lay the new piece against the old before installing: length, diameter, groove and hole positions, thread pitch. If the old part is too worn to compare against, check the new part in its bore or against its mate by hand — it should fit the way a machined part fits, snug and smooth, not loose and not forced. Replace the retaining clips and keys while you are there; they are one-use money. Retention is not optional. A pin without its e-clip, cotter key, or bolt is a pin working its way out under vibration, and what it drops depends on where it lives. If the retainer came off damaged, replace it — never spring a used clip back on and call it held. Why buy your replacement hardware from Auto Lift Services We install, inspect, and repair automotive lifts every week — the ALS-7105-20 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 OEM — 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.
