Barnes 2120058 O-Ring — a direct-fit replacement seal kit. Ordering the seal kit 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-7009-32 Type: Genuine OEM seal kit No hydraulic part works alone. A cylinder is only as good as the fluid feeding it, the fluid is only as clean as the reservoir and filter keep it, and a fresh seal kit won't hold in a barrel that's already scored. That's why a leak is worth diagnosing as a system: replace the weeping part, but check the fluid, the fittings, and the bore before you call it fixed. Hydraulic parts almost always fail by leaking. A rod seal starts weeping and the cylinder body goes wet; a hose cracks near its crimp; a fitting's o-ring flattens; the lowering valve stops seating and the lift drifts down overnight. Fluid finds the weakest seal in the loop and pushes past it. The symptom — a puddle, a slow sag, a spongy lift — tells you roughly where in the loop to look. Replacing your seal kit Swapping a hydraulic hose is mostly about relieving pressure first, catching the fluid, routing the new line so it can't rub or pinch, and bleeding the cylinders afterward. Match the new hose to the old for length, inner diameter, and end fittings. Since a hose under pressure will spray if it's cracked or loose, the full walkthrough is worth reading before you start. Full step-by-step: how to reseal a lift cylinder. Find the right part for your lift The surest way to get the right part is to work from your lift's own breakdown. open our parts lookup, choose your model, and every part is mapped on the drawing with its number and price. If you cannot find the model plate, our guide to finding your model number explains where each lift type hides it, and our phone line is open if you want a hand. Signs of a hydraulic problem Listen to the power unit. A pump that whines, cavitates, or takes longer than it used to reach full height is low on fluid, pulling air past a suction seal, or wearing out. A motor that hums but won't turn, trips the breaker, or smells hot has an electrical fault or a seized pump. Time a full raise and compare it to how the lift used to run. Parts commonly replaced at the same time Plan the whole repair, not just the one part. Cylinders, seals, hoses, and fittings share a pressure system and a service interval, so replacing the obvious failure without the worn companions just sets up the next leak. Give us your model and serial and we will assemble the complete hydraulic kit. Hydraulic fluid The usual fill is ISO-32 hydraulic oil, with some legacy lifts running Dexron ATF; confirm which your lift uses before topping off and keep the two separate. Bleed after filling and check the level again once the air is out — and see your manual for the exact capacity, which is model-specific. Safety notes Clean matters as much as tight in a hydraulic job — a speck of grit through a valve or seal will cost you the repair twice. Cap ports the instant a line is open, use the correct oil, bleed thoroughly, and leak-check at full pressure. Always set the lift on its locks before working underneath it. Before you order Get the details right up front: model, serial, hose lengths, fitting types, and power-unit voltage where it applies. If the cylinder is only weeping, a seal kit is often the better call. Order the oil you will need for the refill at the same time, and we will verify fit before anything leaves the shelf. 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. Why buy your seal kit from Auto Lift Services We install, inspect, and repair automotive lifts every week — the ALS-7009-32 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.
