How To Fix Bowflex Adjustable Dumbbells

If your Bowflex adjustable dumbbells are acting up, you’re not alone. Knowing how to fix Bowflex adjustable dumbbells can save you a costly replacement and get you back to your workout fast. This simple repair guide will walk you through the most common issues and their solutions.

These dumbbells are fantastic for saving space, but their internal mechanism can sometimes have problems. Don’t worry, many fixes are straightforward and require only basic tools. Let’s get your weights working like new again.

This main section covers the essential repair process. Before you start any repair, always ensure the dumbbells are on a flat, stable surface and are not loaded with weight plates. Safety first.

Common Problems and How to Diagnose Them

First, identify what’s wrong. The issue usually falls into one of these categories.

Dumbbell won’t adjust/lock: The selector pin won’t go in or the dial won’t turn.
Weights feel loose or rattle: There’s play in the handle or plates shift during use.
Uneven weight selection: One side changes weight but the other side doesn’t.
Selector dial is stuck or hard to turn: It requires excessive force to rotate.

Tools You Will Likely Need

Gather these items before starting. You might not need them all.

Rubber mallet or a regular hammer with a block of wood
Needle-nose pliers
Hex key set (Allen wrenches)
Phillips-head screwdriver
Silicone-based lubricant (like spray silicone)
Clean cloth and mild cleaner

Important Safety Note

Never try to repair a dumbbell while it’s in the stand or if it’s partially assembled. Always work on them seperately on a clear bench or floor. If you feel a repair is beyond your skill, contact Bowflex customer support.

Step-by-Step Repair for a Non-Locking Dial

This is the most frequent issue. The dial won’t turn to lock in your weight.

Place the dumbbell horizontally on a towel to protect it.
Look into the weight plate holes. You should see the metal selector pins inside.
Using your fingers or needle-nose pliers, gently try to push each pin inward. They should move smoothly and spring back. If one is stuck, that’s the culprit.
Spray a small amount of silicone lubricant around the stuck pin. Let it soak for a minute.
Gently work the pin back and forth with the pliers until it moves freely. Avoid using excessive force.
Wipe away any excess lubricant. Test the dial. It should now turn and lock with a click.

Fixing Loose or Rattling Weights

A rattling sound means internal parts are loose. Here’s what to do.

Remove all weight plates by turning the dial to the lowest setting and lifting them off.
Inspect the internal metal u-shaped brackets that hold the plates. They should be tight.
Check the handle assembly. Some models have screws on the end cap. Tighten these if they’re loose with the correct hex key.
If the rattle is inside the handle itself, it may be a broken internal spring. This requires more advanced disassembly, often starting with removing the end cap and dial face.

Often, just taking the plates off and reassembling them firmly can solve a minor rattle. Make sure each plate is seated correctly on the selector.

When One Side Doesn’t Adjust

If only one side of the dumbbell changes weight, the problem is isolated to that end.

Follow the non-locking dial steps above for that specific side. The issue is almost always a stuck selector pin on that end. Dirt or debris can jam a single pin. Careful cleaning and lubrication usually fixes it.

If the pin moves but the plates still don’t engage, the internal selector mechanism might be misaligned. You may need to partially disassemble the handle. Look for online videos for your specific Bowflex model number for visual guidance.

Cleaning and Preventative Maintenance

The best repair is prevention. Regular care keeps your dumbbells working for years.

Wipe down the dumbbells after each use to prevent sweat corrosion.
Every few months, spray a tiny bit of silicone lubricant into the pin holes and on the dial mechanism.
Store them in a dry place, away from concrete floors which can promote rust.
Never drop the dumbbells. The impact can misalign the internal components.
Avoid getting sand or dirt in the weight plate holes.

When to Contact Bowflex Support

Some problems are too big for a simple fix. Reach out to Bowflex if:

You see visible cracks in the plastic housing or handle.
The internal springs are broken or missing (you’ll see them if you open the end cap).
There is significant rust on the internal metal parts.
Your model is still under warranty. Attempting a major repair yourself might void it.

Have your model number (usually on the handle or end cap) ready when you call. They can sometimes send specific replacement parts, like a new dial or pin set, which is cheaper than a whole new dumbbell.

Final Checklist Before You Finish

After any repair, run through this list.

Do both dials turn smoothly and click at each weight setting?
When locked, do the weight plates feel secure with no wobble?
Does the selected weight on the dial match the plates that are attached?
Is there any unusual noise when you gently shake the assembled dumbbell?

If you answer yes to the first three and no to the last, your repair was a success. Great job! Now you can get back to your training without interruption.

FAQ: Quick Answers to Common Questions

Can I use WD-40 on my Bowflex dumbbells?

It’s not recommended. WD-40 is a penetrant and water displacer, not a long-term lubricant. It can attract dust. Use a dry, silicone-based lubricant instead for better results.

Why do my dumbbells keep getting stuck?

Sticking is usually caused by dirt, dust, or lack of lubrication in the selector pin channels. Regular cleaning and a light silicone spray can prevent this from happening frequently.

Are Bowflex dumbbell repairs easy to do yourself?

Most common fixes, like freeing a stuck pin, are very easy. More complex issues involving internal springs or brackets require more patience and mechanical aptitude, but many people manage them with a good guide.

Where can I find replacement parts?

Contact Bowflex customer service directly first. They sell official parts. You can also sometimes find parts on general fitness retailers websites or auction sites, but ensure they are compatible with your exact model.

How long should these dumbbells last?

With proper care and no accidents like drops, Bowflex adjustable dumbbells can last for well over a decade. The main wear items are the plastic dials and internal springs, which can be replaced.