The Challenger SD117 hydraulic pump 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 hydraulic pump 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: SD117 Brand: Challenger Type: Genuine OEM hydraulic pump 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 hydraulic pump A lowering or flow valve issue — a lift that drifts down or won't reach full height — is often fixed at the valve rather than the cylinder, but it takes a methodical check to be sure. Isolate whether the leak is internal or external, then service or replace the valve and confirm the lift holds height afterward. The step-by-step guide lays out how to trace it. Full step-by-step: how to replace a car lift power unit. 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 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 One trip up, one refill, one bleed: order the companion hydraulic parts with this one. A seal kit alongside a cylinder, a fresh hose, and the correct oil turn a partial fix into a finished job. Tell us what lift you have and we will build the kit so nothing is left to fail next. 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 Pressure and cleanliness are the two rules. Bleed the system completely so there is no air to compress, keep contamination out of every open port, and prove the lift holds at full height with no drift before it sees a vehicle. If you are not certain the bleed is complete, do it again — this is not the place to guess. Before you order Ordering tip: hydraulic parts are matched to the lift's pressure and geometry, so read the model and serial off the plate and, for hoses and cylinders, have the old part's dimensions. Plan to replace the oil and bleed the system as part of the job, and add a seal kit if you are opening the cylinder anyway. 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 hydraulic pump from Auto Lift Services We install, inspect, and repair Challenger lifts every week — the SD117 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.
