The Challenger B40090 hydraulic valve 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 valve 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: B40090 Brand: Challenger Type: Genuine OEM hydraulic valve Fits: 4P14EFX and 4P14XFX The lowering valve (release valve, dump valve) is the solenoid or manual valve on the pump that opens to let fluid flow back to the reservoir when you lower the lift. When it fails it either leaks internally and the lift descends by itself with a car on it, or it sticks and the lift will not lower at all. Diagnosis: raise the lift to max height and watch. If it drifts to the locks in less than an hour with no external leaks, the lowering valve is the answer. 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. Check while the valve is out Pump face and threads — clean, no burrs Solenoid coil and wiring (if electric) — melted lug ends, corrosion Handle and pivot (if manual) — not sticky, not bent Check valve, if separate — a failing check valve on the pressure side gives the same "lift drops on its own" symptom, so verify the lowering valve is actually the problem The valve o-ring seals on hydraulic oil. Use ISO-32, ATF, grease, or vaseline as installation lubricant — not thread sealant, which will end up in the hydraulic system. 10 seconds on the release lever after the lift is down. Not 3, not 5 — 10. A pressurized valve backing out under impact torque will hurt someone. Why buy your Challenger hydraulic valve from Auto Lift Services We install, inspect, and repair Challenger lifts every week — the B40090 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 Challenger — 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.
