Used and Refurbished Floor Scrubbers: How to Buy One That Actually Works

Key takeaways

• The batteries are usually the biggest hidden cost on a used scrubber, so price the machine as if they need replacing unless proven otherwise.
• Dealer-refurbished machines with a written warranty are usually safer than private or auction sales.
• Test the vacuum, squeegee pickup, brush drive, and traction under load, not just at idle.
• Compare the used price plus immediate repairs against a new machine's total cost, not just its sticker.

A used or refurbished floor scrubber can save a large share of the new price, often on the order of 30 to 60 percent, but only if the batteries, vacuum motor, and drive system are sound. Buy from a dealer that offers a written warranty when possible, test the machine wet under load, and budget for batteries unless they are proven healthy.

Floor scrubbers are simple machines, and most are rebuildable. That is good news for used buyers. The bad news is that the parts that fail most often (batteries, vacuum motors, squeegee assemblies, solution valves) are exactly the ones a quick look in a parking lot will not reveal. This page gives you a field inspection you can run in about 30 minutes and a way to price the risk.

Used, reconditioned, and refurbished: what the labels mean

There is no industry standard for these terms, so ask what was actually done. In practice:

Ask for the work order or parts list. A dealer who refurbished the machine can tell you exactly what was replaced. If they cannot, treat it as used.

Where used scrubbers come from, and the risks of each

• Dealer refurbished stock: usually trade-ins. Highest price of the used options, lowest risk, and often available with service support.
• Ex-rental fleets: heavily used but usually maintained on a schedule. Check hours carefully.
• Equipment auctions and liquidations: cheapest, highest risk. Often no chance to test wet. Batteries may have sat discharged for months, which can ruin lead-acid packs.
• Private sellers and online marketplaces: variable. Sometimes a well-kept machine from a closed business, sometimes a problem machine being dumped.

The 30-minute field inspection

Bring a water supply, a stopwatch, a flashlight, and, for flooded lead-acid batteries, a hydrometer. Ask that the batteries be fully charged before you arrive.

Before powering on

1. Read the hour meter. Many machines have separate key, brush, and drive hours. Brush hours are the best indicator of wear.
2. Find the battery date codes and battery type. Lead-acid packs older than about 3 to 5 years in regular use are near end of life even if they still run.
3. Inspect the batteries. Look for corrosion, swollen cases, low electrolyte on flooded cells, and mismatched batteries (a sign someone replaced only one).
4. Open both tanks. Look for cracks, sludge, mold, and odor. A foul recovery tank suggests it was rarely rinsed, which also means hoses and the vacuum may have been neglected. See recovery tank odor.
5. Check the vacuum shutoff float and filter. A missing or broken float lets water reach the vacuum motor and destroy it.
6. Inspect squeegee blades and the squeegee frame. Blades are cheap; a bent frame or broken casters are not.
7. Look at the brush or pad driver. Check for wobble, cracked drivers, and worn bristles.
8. Check the charger. Confirm it is present, matched to the battery chemistry, and that its output connector fits.

Powered tests

1. Battery voltage at rest and under load. A pack that reads fine at rest but drops sharply when the brush and vacuum start is weak. For flooded batteries, check specific gravity in every cell; large differences between cells point to a failing battery.
2. Vacuum motor. It should start smoothly and pull strongly. Listen for bearing whine or grinding. Block the squeegee hose by hand: suction should be firm.
3. Brush motor. Run it with the deck lowered. Watch for slow startup, burning smell, or the breaker tripping.
4. Traction and steering. Drive forward, reverse, and on any available ramp. Check that brakes hold (especially on ride-ons).
5. Solution flow. With water in the tank, confirm flow at each setting and that it shuts off when the deck lifts or the machine stops.
6. Wet pickup test. Scrub a 30 to 50 ft strip, then turn. The floor behind the squeegee should be nearly dry, with no trails at the edges. Trails mean blades, squeegee adjustment, hoses, or vacuum. See scrubber not picking up water and streaks and water trails.
7. Runtime sample. If possible, run for 20 to 30 minutes with brush and vacuum on and watch the battery gauge. A drop of more than about a third in that time on a machine rated for 2 to 4 hours is a warning sign.
8. Check for leaks under the machine after the test.

Inspection scoring sheet

Rate each item 0 (fail), 1 (needs work), or 2 (good). This is a Scrubber Guide rubric, not an industry standard.

Maximum score is 32. Above 26: reasonable buy at a fair price. 20 to 26: buy only if the price reflects the repair list. Below 20, or any 0 on batteries or vacuum without a price adjustment: walk away or treat it as a parts machine.

Pricing the risk: a worked example

The asking price is not the cost. Add what the machine needs on day one. Example using illustrative numbers:

• New 20 in traction walk-behind, comparable model: $9,000.
• Used asking price: $4,000. Batteries 4 years old with weak cells; blades torn; brush worn.
• Day-one needs (get real quotes): replacement battery set, say $1,000 to $1,500; squeegee blades and brush, say $200 to $350; dealer service check, say $150 to $300.
• Real cost: about $5,350 to $6,150, or roughly 60 to 70 percent of new.

Now compare what you give up: warranty, current controls, possibly lithium, and the remaining life. A used machine with 3,000 brush hours may have only a few years left before motors need rebuilding. If the real cost of a used machine is above about 70 percent of new, a new or dealer-refurbished machine with warranty is usually the better value. Full lifetime math is in total cost of ownership.

Brand, parts, and service support matter more for used

A used machine is only as good as your ability to get parts for it. Before buying:

• Confirm a local dealer services that brand and stocks common parts.
• Ask whether the model is discontinued, and if so, how long parts will be supported.
• Get the serial number and ask a dealer to check its service history if it was sold or serviced locally.

Widely sold brands such as Tennant, Nilfisk, Karcher, and Minuteman tend to have broad parts networks, but support varies by region. Check your area.

Red flags that should end the conversation

• The seller will not let you test it wet.
• Batteries are "brand new" but there is no receipt, and the date codes say otherwise.
• The vacuum motor has been bypassed or the float is missing.
• The charger is missing or "any charger will work." Wrong chargers ruin batteries.
• The recovery tank has been painted or coated inside to hide cracks.
• Heavy rust on the deck or frame, typical of machines used in salt, chemical, or food plants without rinsing.
• Mismatched serial plates or a missing data plate.

Make the first month count

After buying, treat it like a new machine with an unknown history:

1. Run a full planned maintenance service, or have the dealer do it.
2. Replace squeegee blades, filters, and any questionable hoses.
3. Equalize or condition the batteries according to the battery maker's guidance; see battery maintenance.
4. Set up a daily cleanout routine from the start using the daily maintenance checklist.

Frequently asked questions