## StairMaster 4000PT Stepper Left Pedal Crank Arm Full Set – MX220
The StairMaster 4000PT Stepper Left Pedal Crank Arm Full Set is a replacement part assembly for the left-side pedal and crank mechanism on a StairMaster 4000PT stepper. It helps replace a damaged, worn, or missing left pedal crank arm assembly so you can restore the machine’s pedal connection and continue with the appropriate repair. This product is identified by SKU and barcode **MX220**.
Product Details and Benefits
This product is a **left pedal crank arm full set** made for the StairMaster 4000PT stepper. The crank arm connects to the pedal mechanism and forms part of the movement system that supports the left pedal during use. When the original component becomes damaged or no longer suitable for service, replacing the complete set may provide a more direct repair than trying to source an individual piece.
The full-set format can help simplify parts identification when the required repair involves the left pedal crank arm assembly rather than a small standalone component. It gives repair technicians, equipment owners, and facility maintenance teams a clearly identified replacement part for the specified StairMaster machine.
Product information:
- **Brand:** StairMaster
- **Product name:** 4000PT Stepper Left Pedal Crank Arm Full Set
- **Product type:** Replacement exercise equipment part
- **Compatible equipment:** StairMaster 4000PT stepper
- **Side:** Left
- **Part number/SKU:** MX220
- **Barcode:** MX220
- **Source property:** Serial number 37486
This part is intended for repair and replacement use. It does not represent a complete stepper machine. The listing identifies the item as a full set for the left pedal crank arm, so buyers should compare the existing assembly and the machine’s parts information before ordering.
Compatibility and Applications
The MX220 left pedal crank arm set is listed for the **StairMaster 4000PT Stepper**. It is intended to replace the corresponding left-side pedal crank arm assembly on that equipment. Typical buyers may include owners repairing a StairMaster 4000PT, commercial gym maintenance staff, fitness equipment technicians, and businesses restoring exercise machines for continued use.
Compatibility is specific to the model information provided. Do not assume that this part fits other StairMaster stepper models or other fitness equipment. Similar-looking crank arms may differ in design, fit, or connection points.
## Why Choose This Replacement Part
Choosing a model-specific replacement can make it easier to match the repair part to the equipment being serviced. The left-side designation also helps prevent confusion with a right pedal crank arm. The full-set description gives buyers a clearer product identity when searching for a replacement for the complete left pedal crank arm assembly.
Before You Buy
Confirm that your equipment is a **StairMaster 4000PT Stepper** and that you need the **left pedal crank arm full set**. Check the original part, machine records, and any available service documentation before ordering. Verify the part reference **MX220** and the listed source serial number **37486** where relevant. The available product information does not provide dimensions, material details, color, installation instructions, warranty information, or a detailed package breakdown. Review those requirements with the seller or a qualified fitness equipment technician before beginning the repair.
