Whirlpool WTW5057LW0 Washer Cam Hub, Actuator or Belt Failure – What Part Fixes This Problem?
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Understanding the Problem
Many Whirlpool top-load washers—including models in the WTW5057LW0 family—use a plastic cam hub/actuator and associated coupler or belt to convert motor/gearcase rotation into agitator movement. Over time the plastic cam or actuator can crack, shear teeth, or wear out; belts can become loose, glazed or break. When these components fail the washer may not agitate or spin properly even though the motor still runs. Typical failures produce intermittent agitation, loud clicking or grinding during the agitate/spin cycles, or a complete loss of drive to the agitator/spinner. The cam hub/actuator is a common wear item and is much less expensive and simpler to replace than the transmission (gearcase) itself. Confirming the cam/actuator or belt is important before replacing more costly parts.
Common Symptoms
Washer runs but does not agitate or spin, weak or intermittent agitation, loud clicking or grinding noises during agitate/spin, agitator spins freely by hand or has stripped splines, or basket turns but clothes stay wet.
Common Causes
- Worn, cracked or sheared plastic cam hub / actuator (coupler) that connects the gearcase to the agitator
- Stretched, glazed, or broken drive belt (on belt-driven variants) causing loss of drive
- Stripped splines on the agitator or cam causing slippage between components (or less commonly, internal gearcase damage)
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
Remove the agitator and visually inspect the cam/coupler for cracked plastic, missing teeth or melted pieces; if you see shredded plastic or the splines are rounded, the cam/actuator kit (e.g., WP285753A) is usually the failed part.
Frequently Asked Questions
How do I know whether the cam/actuator or the transmission (gearcase) is bad?
Start by removing the agitator and inspecting the plastic cam/coupler for cracked or missing teeth and check the agitator splines for rounding. If the cam is damaged, replace it first — it’s the inexpensive, most common failure. If the cam and splines look good but you hear grinding, oil leaks, or the washer won’t move the basket at all after cam replacement, the gearcase may be failing and will require replacement or professional diagnosis.
Can I replace the cam hub/actuator myself and how long does it take?
Yes — replacing the cam/actuator is a common DIY job. Typical steps: unplug washer, remove fabric softener dispenser (if present), remove agitator (usually a bolt or snap-fit), inspect and swap the cam/coupler, reassemble. Most DIYers complete it in 30–60 minutes with basic hand tools. Costs: parts (cam kit) are relatively low — often under $50 — plus any optional belt if needed. If you’re uncomfortable with disassembly or suspect internal gearcase damage, call a service technician.
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