The Challenger 40611-SK-G seal kit is the direct replacement for the Challenger lift it came off of. Cross-referenced as ALS-7234-425, it is the genuine Challenger part — same part number, same fit, and same working specification as the one already on your lift. Ordering the Challenger 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-7234-425
• Brand: Challenger
• Type: Genuine OEM seal kit

The power unit bundles the motor, pump, reservoir, and valves into one hangable box, usually bolted to a column or a pump stand. Press up and the motor spins the pump, which draws fluid from the reservoir and sends it to the cylinder; release, and the dump valve routes it back. The single spec that matters most is voltage — 110 versus 220 — because the wrong one turns the whole unit into a paperweight.

Hydraulic parts fit by the numbers, and the numbers are unforgiving. A cylinder has to match working length and port type; a hose is spec'd by inner diameter, pressure rating, and end fittings; a power unit lives or dies on voltage. Even seal kits differ by who built the cylinder — the same lift model can carry two cylinder brands with different seal profiles. Order to the actual part, not the lift name.

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.

• Cylinder Spacer - Challenger - 12111
• Cylinder Clevis - Challenger - 40082
• Seal Kit - Challenger - 591-50-1204
• Seal Kit - Challenger - 501-50-1620
• Bearing Collar for Cylinder - Challenger - X10-047B
• Seal Kit for 4P14EFX - Challenger - B44011-SK

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

Want to be sure before you buy? Pull the model and serial off your lift's plate and open our Challenger parts lookup to open the exploded parts breakdown for your model — find your part on the drawing and you know it fits. New to finding your model number? our guide to finding your model number covers it, or send a photo of the plate and we will read it for you.

Signs of a hydraulic problem

The fast hydraulic triage: puddle on the floor is an external leak (find it uphill); a lift that won't hold overnight is an internal leak (cylinder or valve); a spongy feel is air or a piston seal; milky fluid is water (service it); a slow or noisy raise is pump, fluid, or air. Match the symptom to the part before you throw a cylinder at a problem that's really a five-dollar washer.

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 Challenger seal kit from Auto Lift Services

We install, inspect, and repair Challenger lifts every week — the ALS-7234-425 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.