# Star Trac 9-7631-MUSAP0 Treadmill Actuator Cog (MX318)

\## Star Trac 9-7631-MUSAP0 Treadmill Actuator Cog (MX318)

The Star Trac 9-7631-MUSAP0 Treadmill Actuator Cog is a replacement cog for the actuator system used in compatible Star Trac treadmills. It helps replace the original actuator cog when the existing part requires service or replacement. If you are repairing a Star Trac treadmill and need the correct actuator gear component, this part provides a clearly identified option by part number: \*\*9-7631-MUSAP0\*\*.

## Product Details and Benefits

This product is a \*\*treadmill actuator cog\*\*. The actuator assembly uses this type of cog as part of its mechanical movement system. A worn, damaged, or missing cog can prevent the related actuator mechanism from operating as intended. Replacing the affected component can help you return the treadmill to service when the replacement matches the original part and equipment requirements.

The product is identified by the following information:

\- \*\*Brand:\*\* Star Trac  
\- \*\*Product name:\*\* Star Trac 9-7631-MUSAP0 Treadmill Actuator Cog  
\- \*\*Part number:\*\* 9-7631-MUSAP0  
\- \*\*Product code/SKU:\*\* MX318  
\- \*\*Barcode:\*\* MX318  
\- \*\*Product type:\*\* Treadmill actuator cog  
\- \*\*Equipment category:\*\* Treadmill replacement part  
\- \*\*Listed serial number:\*\* TRPN0804-U04545

The listing identifies this item as an actuator cog rather than a complete actuator assembly. That distinction matters when ordering. This product is intended as the cog component only, so confirm that you need the replacement gear or cog and not the full actuator mechanism.

## Compatibility and Applications

The Star Trac 9-7631-MUSAP0 actuator cog is associated with \*\*Star Trac treadmill equipment\*\*. It is a replacement part for the actuator system identified by the Star Trac part number \*\*9-7631-MUSAP0\*\*. The available product information does not provide a complete list of compatible treadmill models, actuator assemblies, dimensions, materials, or installation hardware.

Use this part when servicing a Star Trac treadmill actuator and the original component matches the listed part number or other identifying details. It may suit a repair shop, fitness equipment technician, facility maintenance team, or treadmill owner who has already confirmed the required replacement part.

## Why Choose This Product

A correctly matched actuator cog allows you to replace the individual component instead of automatically replacing the entire actuator assembly. Using the exact listed part number also makes it easier to compare the replacement with the component currently installed on your treadmill. The clear MX318 SKU provides an additional reference for ordering, inventory control, and service records.

## Before You Buy

Check your treadmill’s brand, actuator assembly, existing cog, and service documentation before placing an order. Confirm that \*\*Star Trac 9-7631-MUSAP0\*\* matches the required part number. Also verify the product shape and dimensions against the original component if those details are available to you. The listing does not state the material, color, dimensions, warranty, package quantity, or installation instructions. This listing identifies the product as the actuator cog only; it does not identify a complete treadmill actuator assembly.

## Details

- **Price:** 39.99 USD
- **Vendor:** Star Trac
- **Type:** Miscellaneous
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 39.99 USD | In stock |

## Images

- MX318
- MX318
- MX318
- MX318
- MX318
- MX318
- MX318

## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/star-trac-9-7631-musap0-treadmill-actuator-cog-mx318)
> Updated: 2026-08-29