Roper Washer Agitator Dog & Cam Replacement – How to Fix Worn Dogs and Cam
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Understanding the Problem
Many Roper top-load washers use small plastic 'agitator dogs' (sometimes called cogs) and a cam assembly under the agitator to create the one-way motion that moves clothes. Over time those dogs wear or the cam/cradle that holds them cracks, which makes the agitator slip, grind, or spin freely without properly agitating clothes. You may also hear a clicking or grinding noise during the wash cycle or notice poor cleaning performance and clothes not tumbling correctly. Replacing the worn dogs or the cam assembly usually restores proper one-way action. The repair is a common DIY for appliances with a few basic tools: remove the fabric softener/agitator cap, undo the agitator bolt or retaining clip, pull the agitator to expose the cam and dogs, and replace the worn plastic components. Because Roper machines are built on platforms shared with Whirlpool/Maytag, many replacement kits are the same across those brands — but always verify the washer's model number before ordering parts.
Common Symptoms
Agitator spins but doesn’t move clothes, loud clicking or grinding during agitation, clothes not cleaning well, agitator slips or turns both directions, shuddering during cycles.
Common Causes
- Worn or broken agitator dogs (one-way clutch wedges)
- Damaged or cracked agitator cam/cradle that holds the dogs
- Stripped agitator spline or loose/stripped agitator bolt
- Failure of the washer’s one-way clutch assembly (on some models)
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
Confirm the dogs are worn by removing the agitator and inspecting the small wedge-shaped plastic pieces for rounded or missing teeth; if they’re brittle or flattened, the kit needs replacement.
Frequently Asked Questions
Can I replace the agitator dogs and cam myself?
Yes. This is a common DIY repair if you have basic tools (socket set, pliers) and can access the agitator. Turn off power, remove the agitator cap, remove the retaining bolt or clip, pull the agitator out (may require firm upward force), replace dogs and cam, then reassemble. Take photos as you disassemble to help reassembly. If the agitator spline is stripped or the bolt won’t come out, a technician may be required.
How much will parts and labor cost to fix this?
Parts for the dog/cam repair are inexpensive—typically $10–$40 for a dog kit and cam (prices vary by supplier). If you hire a technician, expect labor to add $100–$200 depending on diagnostics and local rates. Always confirm part compatibility using your washer’s model and serial number before purchasing.
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