Used Planter Inspection Checklist: What to Check Before You Buy

Buying used · 9 min read

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A used planter is the most precision-sensitive machine you can buy secondhand. A worn planter doesn't just look tired — it plants every row slightly wrong, all season long, and you won't know the damage until emergence tells the story. Row unit wear, tired metering components, sloppy seed delivery, and tired electronics are the things that separate a good buy from a yield tax. Here's how to inspect a used planter row by row before the money changes hands.

Row units: the business end

Every row unit is its own little planting machine, and it has to work exactly like its neighbors. Start with the disc openers. They should touch each other evenly and have a consistent diameter across the row — worn openers shrink and lose contact, which leaves a wide, sloppy seed trench instead of a clean V. Sight across all the rows: if openers on different rows measure out at visibly different sizes, those rows have been wearing unevenly or parts have been swapped piecemeal, and your trench geometry isn't consistent across the bar.

Check the gauge wheels. They set planting depth, so everything rides on them. Spin each one and watch for wobble; check the tire condition and the bearings. Worn gauge wheel bearings let the wheel tilt, and a tilted gauge wheel changes depth row to row. While you're there, grab the row unit and try to rock it side to side — excessive play in the parallel arms and bushings means the whole row unit is wandering in the ground instead of tracking straight.

Look at the closing system. Closing wheels, drag chains, or press wheels should be intact, straight, and adjustable. Worn-out closing wheels that no longer pinch the trench shut give you poor seed-to-soil contact, which is another way of saying uneven emergence. Check every spring and every adjustment slot — if a closing wheel can't be adjusted because the slot is worn or the spring is shot, that's a row that has been planting compromised for a while.

Seed metering: where singulation happens

The metering units are the most wearing parts on the whole machine, and the most important to get right. Open the meters and look at the discs or plates. On finger-pickup or plate meters, check the fingers and the brush for wear — worn brushes and tired fingers cause skips and doubles. On vacuum or air meters, inspect the seed discs for worn or enlarged holes and check the singulator settings and adjustment mechanisms; a disc that can't hold seed in its holes won't singulate, no matter how good the rest of the machine is.

Check the seals and gaskets on every meter. Air and vacuum meters depend on seals to hold pressure or vacuum, and cracked, flattened, or missing seals mean the system can't maintain the differential the metering needs. Also look at the meter drive — whether it's ground-driven, shaft-driven, hydraulic, or electric, spin or engage it and check for smooth, consistent motion with no binding, no slop, and no missing or chipped drive components.

Seed delivery: from meter to trench

What happens between the meter and the trench matters as much as the meter itself. Check every seed tube for cracks, wear holes, and kinks. Worn or cracked tubes let seed bounce and ricochet on the way down, which scrambles the spacing the meter just created. On high-speed planters with brush-belt or air delivery, inspect the delivery belts or tubes carefully — a worn belt or a delivery tube with internal wear defeats the entire purpose of the system.

Drop a few seed through each tube by hand and watch what comes out the bottom. They should drop cleanly and consistently. While you're under the bar, look at the condition of the seed tube guards and the bottom of each row unit — heavy wear there means the unit has been running shallow or dragging, which wears components and messes with depth control.

The toolbar and frame

Walk the full toolbar and look at the frame the way you'd look at any heavy equipment frame: cracks, repairs, bent sections, and worn mounting points. Check every row unit mounting point for ovaled bolt holes or cracked welds — a row unit that can shift on the toolbar is a row that wanders in the field. Check the toolbar for straightness by sighting down its length; a bent bar makes row spacing inconsistent across the whole machine.

Look at the fold mechanism if it's a folding planter. Cycle it if you can, and check every hinge pin, cylinder, and lock for wear and solid engagement. A fold that doesn't lock tight is a safety problem on the road and a row-spacing problem in the field. Check the tongue and hitch for the same cracks and wear you'd check on any towed implement.

Drive systems and variable rate

If the planter has individual row drives — hydraulic or electric — check each one. Spin the meters and confirm every row actually drives; a row that's freewheeling or dead means a failed drive unit. On shaft-driven planters, check the drive shafts for straightness, check every coupler and sprocket for wear and missing teeth, and check chain or shaft alignment.

If the planter is set up for variable rate, look at the rate controller, the hydraulic or electric rate drive, and the wiring to every unit. Ask which monitor and which software version it runs, and whether any unlocks or subscriptions the variable-rate functions need are transferable. A planter whose precision electronics are locked to the previous owner's account or subscription is a planter that's planting blind until you sort that out — confirm the status before you buy, not after.

Hoppers, tanks, and fertilizer systems

Check every seed hopper or bulk tank for cracks, UV damage, and lid seals that actually seal. Moisture in seed storage on the machine means moisture on your seed. If the planter carries liquid or dry fertilizer, check the tanks, hoses, and applicator components the same way: cracked hoses, corroded fittings, and worn openers or tubes all mean the fertilizer side has been limping along.

Electronics: the monitor and harness

A modern planter is half electronics. Inspect the full wiring harness for chafed, repaired, or rodent-damaged sections, and check every connector for green corrosion and tight fit. Look at the seed tube sensors — they should be present on every row and intact. Ask to see the monitor power up and display data from every row; a monitor that shows dead rows, flickering data, or error codes is telling you exactly what the planter will tell you in the field.

Check GPS receivers, section control wiring, and any clutch wiring if the machine has row clutches. And confirm the monitor, cables, and any in-cab hardware are included in the sale — missing cab components are a common surprise on used planters.

Tires, transport, and safety

Check the transport tires for dry rot, uneven wear, and age — planter tires often rot before they wear out from sitting. Check the transport locks, slow-moving-vehicle signs, and all lights. If it's a wide planter, make sure the transport width and lock hardware are complete and functional, because you'll be on public roads with it.

Records and questions to ask

Ask for maintenance records: opener and gauge wheel replacements, meter rebuilds or replacements, seed tube replacements, and any drive or electronics repairs. Ask what crops it planted (corn and beans wear differently than small grains), how it was stored (inside matters — electronics and seals don't like the sun), and whether it ever sat loaded. Ask for a planting test if you can: a short run where the monitor shows singulation and spacing data from every row is worth more than any visual inspection. And run your own singulation check on a few meters with the seller's seed if possible — the numbers on the monitor are the machine's report card.