The Challenger 15075SK seal kit is the direct replacement for the Challenger lift it came off of. This is the genuine Challenger part — 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: 15075SK
• Brand: Challenger
• Type: Genuine OEM seal kit

Dirty or wrong fluid quietly wrecks hydraulic parts. Milky oil means water got in and the pump is cavitating; dark, gritty oil means the system is grinding itself and packing the filter with metal. Mixing ISO-32 and ATF, or topping off with whatever's on the shelf, changes the viscosity the pump was built for. Half the "bad cylinder" calls in a shop start as fluid that should have been changed years ago.

The cylinder is where hydraulic pressure becomes lift. Fluid pushed behind the piston drives the rod out, the rod raises the carriage or pulls the cables, and a check valve holds it up there until the lowering valve lets it back down. It's a simple, rugged part — until the rod seal wears or the barrel scores, at which point it can't hold pressure and the lift won't stay up.

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.

• Challenger 15075 Cylinder Assembly-69" Stroke

Replacing your seal kit

Replacing a power unit means confirming the voltage matches, killing power at the breaker, bleeding the hydraulic pressure, then transferring the lines and wiring to the new unit and refilling with the correct fluid. Getting the voltage and the fluid right is what separates a working swap from a paperweight. The complete procedure covers each step in order. 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 Challenger 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

Wipe the cylinder rod and body clean, cycle the lift, and look again. A film of oil creeping down from the rod seal means the seal is weeping; a wet fitting means an o-ring or washer is done. Then raise the lift, mark the height, and leave it overnight — if it has drifted down by morning, the cylinder, check valve, or lowering valve is bleeding internally.

Parts commonly replaced at the same time

The parts near a hydraulic failure are usually next in line — seals that are hardening, a hose that is cracking, fittings that seep. Do them together while the system is open and bled. We will match the seal kit, hose, and oil to your lift so you are not chasing the same leak in a month.

Hydraulic fluid

Most 2-post and 4-post lifts run hydraulic oil equivalent to ISO-32; some older units were filled with Dexron ATF. Check what your lift currently uses and do not mix the two — and defer to your lift's installation manual for the exact fill capacity, since it varies by model.

Safety notes

A hydraulic lift that drops or drifts almost always traces to air or a failed seal, both of which are preventable. Relieve pressure before opening anything, bleed until the stream runs solid, and never sign off a repair with the lift drifting even slightly at full height. Locks stay engaged while you work.

Before you order

Before ordering, confirm your lift's model and serial and, for a cylinder or hose, the exact length or fitting configuration — these change across production runs. If you only need to stop a leak, a seal kit may be the smarter buy than a whole cylinder; call and we will help you decide before you spend.

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.

Why buy your Challenger seal kit from Auto Lift Services

We install, inspect, and repair Challenger lifts every week — the 15075SK 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.