A shopping cart that squeaks, drags, shakes, or refuses to roll smoothly may not have a complicated mechanical problem. In many cases, the trouble is wrapped tightly around the wheels.

Hair, string, plastic film, mop fibers, produce netting, and other debris can collect around a shopping cart’s wheel axle. As the cart continues to roll, this material winds tighter and works its way between the wheel and caster fork. Eventually, the wheel may become difficult to turn, develop a flat spot, or stop rotating altogether.

Fortunately, catching the problem early can prevent unnecessary damage.

Start With a Careful Inspection

Before attempting a repair, remove the cart from service and place it in a safe maintenance area. Turn each wheel by hand and inspect the space between the wheel, axle, and caster fork.

Look for:

• Hair or string wrapped around the axle
• Plastic or fibers packed behind the wheel hub
• Cracked or damaged wheel tread
• Side-to-side wobbling
• Grinding, scraping, or rough rotation
• Flat spots caused by a wheel that has stopped turning

A small amount of buildup may only require cleaning. A wheel with bearing damage, a bent axle, or a permanent flat spot will likely need to be replaced.

Cut the Debris Into Smaller Sections

Trying to pull out one large, tightly wound bundle is usually difficult. Instead, slowly rotate the wheel and carefully cut the material into several smaller sections.

Small scissors, a seam ripper, tweezers, needle-nose pliers, or a guarded hook blade can help reach the material without damaging the wheel. Avoid using a large open utility knife. It can easily slip, injure the technician, or cut into the wheel tread.

After cutting the bundle, use pliers or tweezers to pull each section away from the axle. Continue rotating the wheel because additional material may be hidden behind the hub.

Remove the Wheel When Necessary

If the wheel still binds after the visible debris has been removed, material may be packed inside the hub or behind the wheel.

When the caster design allows it, remove the axle bolt and carefully slide the wheel out of the caster fork. Keep washers, spacers, guards, and other hardware in their original order so they can be reinstalled correctly.

Clean the axle and inspect the wheel bearing or bushing. Check for rust, scoring, excessive wear, loose components, or a bent axle. If the wheel uses a riveted or sealed axle assembly, replacing the wheel or caster may be safer than attempting to force it apart.

Clean and Reassemble the Caster

Wipe the wheel, hub, axle, and caster fork with a damp cloth and mild detergent. Avoid harsh solvents that could damage rubber, polyurethane, or plastic wheel materials.

Dry all components thoroughly before reassembly. Water left inside the hub can damage bearings or remove existing lubrication.

Some caster assemblies require periodic lubrication, while others contain sealed or maintenance-free bearings. Use only the lubricant recommended for the wheel or caster. Applying too much lubricant can attract more dirt, hair, and debris.

Once the wheel has been reinstalled, spin it by hand and turn the caster through a complete rotation. Test the cart on a smooth floor to make sure it rolls straight, turns properly, and no longer drags or shakes.

There really isn’t any easy way around it. Hair and other gunk must be removed by hand. In this video, we are prepping a cart for refurbishment.

Know When to Replace the Wheel

Removing debris will not fix a wheel that has already suffered permanent damage.

The wheel or caster should be replaced if it continues to bind, grind, wobble, or resist turning after cleaning. Replacement may also be necessary when the wheel has a flat spot, cracked tread, excessive bearing play, a damaged axle, or a loose swivel assembly.

Returning a damaged cart to service can frustrate customers, damage store fixtures, and create additional wear on the cart frame.

Regular Inspections Prevent Bigger Problems

A quick wheel inspection can save time and prevent more expensive repairs. Shopping cart wheels should be checked whenever carts are brought in for routine service, pressure washing, or general maintenance.

Stores that frequently encounter plastic wrap, produce netting, mop fibers, or other loose material may need to inspect their carts more often.

Carts and Parts provides shopping cart maintenance, replacement wheels, caster assemblies, and other parts needed to keep carts rolling smoothly. Addressing a small wheel problem today can help prevent a damaged caster, frustrated shopper, or unusable cart tomorrow.