The Challenger 44780W hydraulic fluid 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 fluid 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: 44780W
• Brand: Challenger
• Type: Genuine OEM hydraulic fluid

The hydraulic side of a lift is a closed loop: the power unit's motor drives a pump that pushes fluid from the reservoir, through a hose and fittings, into a cylinder that does the lifting, while a lowering valve meters it back to tank on the way down. Every part in that loop either moves fluid, holds pressure, or seals it in. When one link weeps or won't hold, the whole lift feels it.

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.

Replacing your hydraulic fluid

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. Not sure on the procedure? Find your lift in our parts lookup or call and we will walk you through it.

Find the right part for your lift

Not certain this is the exact part your lift needs? Start with your lift's model and serial off the data plate, then open our Challenger parts lookup to see the visual parts breakdown for your model — the exploded drawing with every part numbered and priced. If your plate is missing or unreadable, our guide to finding your model number walks through where to find it, or send us a photo and we will identify the lift for you.

Signs of a hydraulic problem

A spongy or bouncy lift under load is air in the system or a failing seal letting pressure bleed past the piston. Bleed the cylinders first; if it's still soft, the piston seal isn't holding. Watch the rise, too — a cylinder that stalls partway or shudders is either low on fluid, sucking air, or scored inside so the seal skips.

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

When you refill, use the right oil: ISO-32 hydraulic fluid on most lifts, or Dexron ATF on some older designs — never a blend of the two. Your installation manual lists the correct capacity for your specific lift, so fill to that spec and re-check the level after you have cycled and bled the system.

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.

Not sure this fits? Here's how to check

Pull the number off your lift's model plate first — model and serial both. Manufacturers run mid-cycle revisions that keep the model name but change hardware, so two lifts with the same name on the column can take different parts. The serial is what removes the guesswork.

Second check: compare the old part against this listing before you order. Length, mounting pattern, and thread sizes tell most of the story. If anything doesn't line up, or if the old part is too worn or broken to measure, call us with photos — we work on these lifts every week and can usually confirm fit from a picture and the lift's serial faster than you can dig through a parts diagram.

Why buy your Challenger hydraulic fluid from Auto Lift Services

We install, inspect, and repair Challenger lifts every week — the 44780W 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.