How To Fix Selecttech Dumbbells

If your Bowflex SelectTech dumbbells are acting up, you’re not alone. This guide will show you how to fix SelectTech dumbbells with simple, step-by-step repairs you can do at home. Many common issues, like stuck plates or a loose handle, don’t require a professional and can be solved with basic tools and a little patience.

Before you start any repair, always remember to safety first. Make sure the dumbbells are unloaded and on a flat, stable surface. Working carefully will prevent futher injury and damage to the equipment.

Most problems with adjustable dumbbells fall into a few main categories. Identifying your specific issue is the first step. The good news is that the core design is robust, and many malfunctions are due to dirt, lack of lubrication, or minor part wear.

Let’s break down the most frequent problems and their solutions.

Common SelectTech Problems and Quick Diagnoses

Here are the issues you might be facing:

Plates Won’t Lock: You dial a weight, but the plates don’t engage or feel loose.
Plates Won’t Release: You change the dial, but some or all plates remain stuck on the handle.
Grinding or Crunching Noise: You hear a harsh sound when rotating the dial or lifting.
Loose or Wobbly Handle: The central handle has excessive play or movement.
Broken or Worn Selector Dial: The dial itself is cracked, spins freely, or doesn’t click into place.

Tools You’ll Need for Most Repairs

Gathering these items beforehand will make the process smooth. You likely have many already.

Clean microfiber cloths
Isopropyl alcohol (90% or higher is best)
Silicone-based lubricant spray (NOT WD-40)
Needle-nose pliers
Small flat-head and Phillips screwdrivers
A small container for organizing screws
Cotton swabs

Repair 1: Fixing Stuck or Non-Locking Plates

This is often caused by dirt, dust, or dried grease in the selector mechanism.

Step-by-Step Cleaning & Lubrication

Unload and Inspect: Set the dials to the lowest weight. Look for visible debris in the number windows and around the plate connectors.
Initial Clean: Use a dry cloth to wipe away any loose dust from the entire dumbbell, especially around the dials.
Deep Clean Mechanism: Spray isopropyl alcohol on a cotton swab. Gently clean inside the selector dial number window and around the dial’s edge. Rotate the dial to work the alcohol into the seams.
Apply Lubricant: Spray a small amount of silicone lubricant into the seam where the dial meets the dumbbell body. Rotate the dial through all settings several times to distribute the lubricant.
Test Function: After letting it sit for a minute, test the dial. Select different weights, listening for smooth clicks. The plates should lock and release cleanly.

Repair 2: Fixing a Grinding or Crunching Sound

A grinding noise usually means metal-on-metal contact or a foreign object inside.

Perform the full cleaning and lubrication steps from Repair 1 first.
Inspect the metal plates and the slots they slide into for any small pebbles, metal shavings, or other debris. Use needle-nose pliers to carefully remove anything you find.
Check for bent pins or connectors on the dumbbell that align with the holes in the plates. A bent pin can cause misalignment and grinding. If you see a slightly bent pin, you can try to gently straighten it with pliers, but be very careful not to break it.

Repair 3: Tightening a Loose or Wobbly Handle

Over time, the main handle bolt can loosen. This is a straightforward fix.

Locate the End Cap: On one end of the handle, you’ll find a plastic or rubber end cap. Pry it off carefully with a flat-head screwdriver.
Tighten the Bolt: Inside, you’ll find a large bolt (often a hex bolt). Use the correct sized wrench or socket to tighten it clockwise. Don’t over-tighten—just until the handle is firm and has no play.
Replace the Cap: Snap the end cap back into place. Test the handle for stability.

Repair 4: Replacing a Broken Selector Dial

If the dial is cracked or the internal tabs are broken, it needs replacement. You can order a new dial kit directly from Bowflex.

Remove the Old Dial: The dial is typically held by small plastic tabs or a central screw. Consult your model’s manual. For most, you gently pry the dial off from the edge.
Clean the Area: Thoroughly clean the exposed selector shaft and housing.
Install the New Dial: Align the new dial with the shaft and press firmly until it clicks into place or secure it with the screw. Ensure it rotates freely and clicks at each number.

Advanced: Internal Spring or Pin Replacement

If cleaning and lubrication don’t work, an internal spring may be broken. This requires more disassembly.

Document the Process: Take photos with your phone at each step so you can reassemble correctly.
Remove the End Covers: Carefully remove any screws and the plastic end covers on both sides of the dumbbell body.
Identify the Faulty Part: Inside, you’ll see a series of springs and pins that engage the plates. Look for any that are disconnected, stretched out, or broken.
Replace the Part: Order the specific replacement spring or pin kit. Using your photos as a guide, swap out the old part for the new one.
Reassemble: Carefully put the end covers back on and tighten the screws. Test the dumbbell before adding weight.

Preventative Maintenance Tips

Taking care of your dumbbells prevents most issues. A little upkeep goes a long way.

Store them on a clean, dry surface, not directly on a concrete garage floor.
Wipe them down with a dry cloth after each use to remove sweat and dust.
Every few months, perform the quick cleaning and silicone lubrication steps.
Avoid dropping the dumbbells, especially when they are unloaded, as this can misalign internal components.
Always double-check that the weight is securely locked before lifting.

When to Contact Bowflex Support

Some problems are best handled by the manufacturer. Reach out to Bowflex if:

The dumbbell is still under warranty (do not open it if it is!).
You have a major crack in the main housing or handle.
Internal components are severely corroded.
You’ve tried the repairs above and the problem persists. They have excellent guides and can send specific parts.

FAQ: Your SelectTech Repair Questions Answered

Can I use WD-40 on my Bowflex dumbbells?

No. WD-40 is a degreaser and penetrant, not a lubricant. It will dry out the plastic and can actually attract more dust. Always use a dry silicone-based lubricant.

Why do my SelectTech dumbbells keep getting stuck?

Chronic sticking is almost always due to dirt or lack of lubrication. Regular cleaning with isopropyl alcohol and a light silicone spray every few months usually solves this completly.

Is it safe to use super glue on a cracked dial?

It is not recommended. The dial undergoes stress and glue likely won’t hold. A replacement dial kit is inexpensive and a much safer, more reliable fix.

Where can I buy replacement parts?

The best source is the official Bowflex website or their customer service line. They sell selector dials, spring kits, and other components specific to your model. Using official parts ensures compatibility.

How long should SelectTech dumbbells last?

With proper care and maintenance, they can last for many, many years. Avoiding drops and keeping them clean are the two biggest factors for longevity. Even with heavy use, the metal components are very durable.

Fixing your own SelectTech dumbbells is a rewarding project that saves you time and money. By following this guide, you can address the vast majority of common issues yourself. Remember, start with the simple cleaning process—it solves more problems than you’d think. With a little bit of attention, your adjustable dumbbells will be working like new again, ready for your next workout session.