Appliance Spares
Quick answer: If your top loader fills, drains and spins but the clothes barely move during the wash, the top half of the dual-action agitator has stopped gripping. Four small plastic agitator dogs (P/N 285811) inside it wear smooth, and the upper auger free-spins instead of ratcheting. A dogs and cam kit runs $10–40 depending on how much you replace, and the swap takes about ten minutes with a socket set. Match the part to the model number on your machine’s sticker before you order.
Last updated August 2026
The wash finishes, and the clothes haven’t moved
It’s the quiet failure. The machine fills on time, drains on time, spins the load damp-dry and beeps like nothing is wrong. But the whites you loaded on top are still on top, still soapy, and the towels underneath never saw detergent.
On a Whirlpool top loader with a dual-action agitator, the wash depends on the top half of that agitator. The lower fins swish back and forth while the spiral upper auger ratchets around in one direction, dragging clothes down and rolling the load over. When the ratchet stops gripping, everything else still runs perfectly — and nothing washes. The usual culprit is a set of four plastic teeth about the size of a ten-cent piece: the agitator dogs.
Here is the quick map from symptom to part.
| Symptom | What it means | The part |
|---|---|---|
 Top half of the agitator spins freely both ways; clothes don’t turn over | The four plastic agitator dogs have worn smooth and can no longer bite the ratchet | Whirlpool agitator dogs and cam kit 285811 |
| New dogs slip again within weeks, or the cam teeth look rounded and chewed | The upper cam assembly is worn as well, not just the dogs | Whirlpool upper agitator cam kit 285811 / 3363663 |
 LG WTG9530S, WTG9532VH, WTR1132BF, WTR1132WF or WTR1234W with a cracked or missing agitator cap | Different design — no dogs; the moulded centre cap has let go | LG agitator cap (WTG9530S / WTG9532VH / WTR series) |
 LG WTG1434BHF, WTG1434VHF, WTG1434WHF or WTG6530W with a cracked or missing agitator cap | Same failure, different model family — the two LG caps are not interchangeable | LG agitator cap (WTG1434 / WTG6530W) |
What the agitator dogs actually do
Pull the top half of a dual-action agitator apart and you’ll find a cam and a ring of four small plastic dogs, each with angled teeth on its outer edge. In the wash direction the teeth bite into the ratchet moulded inside the auger and drive it around; on the return stroke they slip. That one-way action is the whole trick: the bottom fins swish, the top auger creeps steadily around, and the load rolls over instead of sitting in layers.
The dogs are soft plastic on purpose. They’re the sacrificial part, built to wear out long before the auger or the gearbox does, and after years of full loads the teeth round off until they can’t bite in either direction. The auger then spins free both ways and the rollover stops. The dogs have done their job by dying — they just need a decent burial and four replacements.
The ten-second test before you order anything
Unplug the machine, open the lid and grab the upper auger with the drum empty. Hold the lower fins still with your other hand and twist the top. Healthy dogs let it turn one way with a firm click-click-click and lock solid the other way. Worn dogs let it spin freely in both directions, often with a dry, gravelly ratchet sound. That’s the diagnosis, done.
Two look-alike faults to rule out first:
- The whole agitator — both halves — barely moves under a full load while the motor hums along. That points at the drive belt, motor coupling or clutch, not the dogs.
- The machine fills and then sits silent, or washes but refuses to spin. That’s interlock territory — see the lid switch guide before you buy anything.
If drain and spin are normal and only the top half free-wheels, it’s dogs.
The swap: cap off, one bolt, new dogs
- Unplug the machine at the wall. It’s a ten-minute job with zero reasons to do any of it live.
- Pop the dispenser or cap off the top of the agitator. Most lift off with a firm pull; otherwise lever gently with a flat screwdriver wrapped in a rag.
- Lift out the dust cap underneath to expose the centre bolt down inside the auger. You’ll need a socket on a long extension — most of these machines take a 7/16-inch socket.
- Undo the bolt and lift the top half of the agitator off the shaft.
- Turn it over. The cam assembly holding the four dogs sits in the base of the auger. Lift the old dogs out and compare them with the new set — the rounded-off teeth tell the whole story.
- Sit the new dogs in the cam with the teeth facing out, reassemble in reverse order and snug the bolt down firmly, without gorilla torque.
Run a short cycle with a couple of towels. You should see the auger creeping around again and the load turning over properly.
Dogs kit or full cam kit?
The dogs and cam kit 285811 covers the classic failure and sits in the $10–20 band. But if the auger has been slipping for months, the cam and ratchet surfaces can be chewed up as well — new dogs will grip for a few weeks and let go again. That’s what the upper cam kit 285811 / 3363663 is for: it replaces the cam assembly along with the dogs, sits in the $25–40 band, and it’s the one to buy if the cam’s own teeth look rounded when you pull the agitator apart. Check both listings against your model number rather than paying for the job twice.
LG top loaders: different design, different part
LG’s WTG and WTR top loaders don’t use agitator dogs at all — the agitator is driven directly, so there’s no ratchet inside to wear. What does turn up broken on those machines is the agitator cap, the moulded centre piece that finishes and retains the agitator. Caps crack, or get levered off during a deep clean and go missing.
There are two caps across the common families, and they are not interchangeable. One suits WTG9530S, WTG9532VH, WTR1132BF, WTR1132WF and WTR1234W; the other suits WTG1434BHF, WTG1434VHF, WTG1434WHF and WTG6530W. Both sit in the $15–25 band. The caps look near-identical in photos, so let the model number on your sticker — under the lid or on the back panel — make the call.
When it isn’t the dogs
If the free-spin test comes back healthy, work down the list:
- Whole agitator weak or dead under load, motor still running: belt, coupling or clutch. These machines usually still drain and spin, which is why the fault gets mistaken for worn dogs.
- Front loader that fills and drains but the drum never turns: that’s a brushed-motor symptom — see motor carbon brushes, explained.
- Samsung top loader not spinning or agitating: the causes stack differently on those machines — see Samsung washing machine not spinning: 5 causes and fixes.
- Machine shakes or bangs on spin once the wash is sorted: that’s suspension, not agitation — see which suspension rod kit or shock absorber fits my washing machine.
For scale: a repairer’s call-out typically runs $100–165 before parts. A dogs kit is a $10–20 part held in by one bolt, which makes it about the cheapest first move in appliance repair.
Frequently asked questions
Q: How do I know it’s the agitator dogs and not the gearbox or clutch?
A: Hold the lower fins still and twist the upper auger by hand. A dogs problem shows as the top half spinning freely in both directions while fill, drain and spin all behave normally. Gearbox or clutch trouble shows as the whole agitator moving weakly under a real load, usually with the motor clearly running. The twist test takes ten seconds and costs nothing.
Q: What tools do I need to replace agitator dogs?
A: A socket set with a long extension — most Whirlpool agitator bolts take a 7/16-inch socket — plus a flat screwdriver for the cap and a rag to protect the plastic. The whole job happens through the lid, so there’s no need to pull the machine out or remove the cabinet.
Q: Does the 285811 kit fit every Whirlpool top loader?
A: It’s used across a wide run of Whirlpool dual-action top loaders, but not all of them, and machines sold under other badges can take different parts. Check the model number on your model sticker against the listing, or send us the model number and we’ll check it against the part before you order.
Q: Can worn agitator dogs damage the rest of the machine?
A: No. They’re the sacrificial part, designed to wear before the cam, auger and gearbox do. Running with worn dogs mostly just means bad washing — the load doesn’t roll, detergent sits in pockets and heavy items never reach the bottom. Fit new dogs and the machine carries on.
Q: My LG top loader isn’t agitating — will agitator dogs fix it?
A: No. LG’s WTG and WTR series drive the agitator directly, so there are no dogs to wear. Weak agitation on those machines points elsewhere — start with load size and balance before blaming parts. The common LG agitator part we stock is the cap, matched by model family, so check your model sticker first.
Ready to fix it this weekend? Lift the lid or check the back panel for the model sticker, then search the model or part number at our washing machine parts store — or send the number through our contact page and we’ll match the right kit or cap before you order. Get your get it to us by 12pm Sydney time and it leaves the Northern Beaches warehouse that afternoon.
Disclaimer: this article is general information only and is provided without warranty of any kind. Appliance designs vary between models and production runs — always follow the manufacturer’s instructions, switch off and unplug the appliance before starting any work, and confirm parts against the model number on your appliance’s model sticker. Any repair is undertaken at your own risk and Oz Appliance Spares accepts no liability for injury, loss or damage arising from work performed after reading this guide, to the maximum extent permitted by law. If in doubt, use a qualified technician.
