The BendPak 5585012 power unit is the direct replacement for the BendPak lift it came off of. This is the genuine BendPak part — same fit and same working specification as the one already on your lift. Ordering the BendPak power unit 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: 5585012
• Brand: BendPak
• Type: Genuine OEM power unit

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 power unit

Replacing a hydraulic cylinder comes down to relieving all pressure, capping the lines so nothing gets contaminated, getting the old cylinder out and the new one in, then bleeding the air and leak-checking under load. The exact removal path differs by lift style, and skipping the bleed leaves the lift spongy. Because a cylinder holds a vehicle in the air, the full procedure is worth following start to finish. 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 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

Hydraulic parts travel in company: a leaking cylinder often needs a seal kit, a tired hose, and a fluid change all at once. Since you are relieving pressure and bleeding anyway, do the related wear items in the same visit. Tell us your model and we will pull the matching seals, hose, and oil.

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

The failure mode that hurts people is slow drift-down from a bad seal or trapped air, so never leave a hydraulic repair half-bled. Support the lift on its mechanical locks while you work, relieve pressure before opening the system, and cycle it several times empty — watching for drift — before a vehicle goes on it.

Before you order

A little prep prevents a wrong order: confirm model and serial, measure hoses and note fitting sizes, and check whether a reseal solves it before buying a complete cylinder. Budget for oil and bleeding as part of the repair. We will confirm the right part for your production run before it ships.

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 BendPak power unit from Auto Lift Services

We install, inspect, and repair BendPak lifts every week — the 5585012 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.