Thermo King External Snap Ring for SL, SLX, SLXi & T-Series 559957
Official OEM Thermo King parts catalog entry for the Ring snap 559957, verified by PEAK Thermo King and West Texas Thermo King Texas, Utah, Wyoming, Washington, Oregon, serving all of the USA.
Built for Performance: The Thermo King Ring Snap 559957 delivers OEM-grade axial retention for Thermo King refrigeration system components, ensuring secure, precise retention in reefer trailer drive and accessory assemblies.
Thermo King refrigeration system operators rely on this external snap ring for dependable component security across SL, SLX, SLXi, and T-Series units. West Texas Thermo King, a certified Thermo King dealership, supports fleets across the Permian Basin and West Texas with verified OEM parts and service to maximize uptime and return on investment.
Key Features & Customer Benefits
- OEM Part Number 559957 – Ensures correct fit and traceability for Thermo King service records and parts programs.
- Steel Construction – Provides durable axial retention for rotating assemblies under repeated duty cycles.
- External Snap Ring Design – Secures shafts, bearings, and pulleys to prevent axial movement and maintain alignment.
- Precise Fit – Designed for Thermo King SL, SLX, SLXi, and T-Series components to reduce installation time and rework.
- Fleet-Ready Reliability – Supports consistent operation across transport refrigeration, reducing unscheduled downtime and service costs.
Product Details
| Part Number | 559957 |
| Product Name | Ring Snap |
| Material | Steel |
| Type | External snap ring (retaining ring) |
| Diameter | 1.575 in |
| Thickness | 0.062 in |
| Groove Diameter | 1.437 in |
| Compatibility | Thermo King SL, SLX, SLXi, and T-Series refrigeration units (including common reefer trailer and truck assemblies) |
Efficiency & Sustainability
The Thermo King Ring Snap 559957 supports efficient transport refrigeration by maintaining precise mechanical alignment and reducing wear on bearings and pulleys. Reliable retention contributes to fuel-efficient cooling and lower life-cycle costs for temperature control fleets, including operations using Smart Reefer SR-4 systems and CARB Evergreen-compliant strategies.
Installation & Maintenance Tips
Install snap rings into the intended shaft or bore groove using purpose-built snap ring pliers. Inspect the groove and mating surfaces for wear or burrs before installation. Include the snap ring in scheduled preventive maintenance intervals and replace any ring that shows distortion, corrosion, or loss of spring tension to preserve assembly reliability.
Real-World Applications
This external snap ring secures rotating components on reefer trailers, refrigerated trucks, and auxiliary drive systems — commonly used in tensioner, idler, and clutch assemblies across Thermo King SL, SLX, SLXi, and T-Series units. It supports continuous transport refrigeration service in line-haul and regional delivery fleets.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsBacked by Thermo King’s engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting performance and uptime assurance for fleet operations.
For product verification or service assistance, call (806) 376-5837.
For current warranty eligibility or OEM replacement coverage, please contact us for warranty information or contact the service department for confirmation.
Frequently Asked Questions
Q: Is the Ring Snap 559957 compatible with Thermo King SL series units?
A: Yes, the Ring Snap 559957 fits many Thermo King SL-series assemblies where an external snap ring is specified.
Q: What is the primary function of this snap ring?
A: The snap ring provides axial retention for shafts, bearings, and pulleys to maintain alignment and prevent component movement in refrigeration drive systems.
Q: Can fleets in the Permian Basin get installation support?
A: Yes, West Texas Thermo King offers installation and service support across Amarillo, Lubbock, Odessa, and surrounding West Texas regions.
Related Resources
Ask about fleet-wide parts programs through West Texas Thermo King.
Produced by a certified Thermo King dealership, West Texas Thermo King | a Division of PEAK Industrial. Servicing fleets across Amarillo, Lubbock, and Odessa.
Official OEM Thermo King parts catalog entry for the Ring snap 559957, verified by PEAK Thermo King and West Texas Thermo King Texas, Utah, Wyoming, Washington, Oregon, serving all of the USA.
Built for Performance: The Thermo King Ring Snap 559957 delivers OEM-grade axial retention for Thermo King refrigeration system components, ensuring secure, precise retention in reefer trailer drive and accessory assemblies.
Thermo King refrigeration system operators rely on this external snap ring for dependable component security across SL, SLX, SLXi, and T-Series units. West Texas Thermo King, a certified Thermo King dealership, supports fleets across the Permian Basin and West Texas with verified OEM parts and service to maximize uptime and return on investment.
Key Features & Customer Benefits
- OEM Part Number 559957 – Ensures correct fit and traceability for Thermo King service records and parts programs.
- Steel Construction – Provides durable axial retention for rotating assemblies under repeated duty cycles.
- External Snap Ring Design – Secures shafts, bearings, and pulleys to prevent axial movement and maintain alignment.
- Precise Fit – Designed for Thermo King SL, SLX, SLXi, and T-Series components to reduce installation time and rework.
- Fleet-Ready Reliability – Supports consistent operation across transport refrigeration, reducing unscheduled downtime and service costs.
Product Details
| Part Number | 559957 |
| Product Name | Ring Snap |
| Material | Steel |
| Type | External snap ring (retaining ring) |
| Diameter | 1.575 in |
| Thickness | 0.062 in |
| Groove Diameter | 1.437 in |
| Compatibility | Thermo King SL, SLX, SLXi, and T-Series refrigeration units (including common reefer trailer and truck assemblies) |
Efficiency & Sustainability
The Thermo King Ring Snap 559957 supports efficient transport refrigeration by maintaining precise mechanical alignment and reducing wear on bearings and pulleys. Reliable retention contributes to fuel-efficient cooling and lower life-cycle costs for temperature control fleets, including operations using Smart Reefer SR-4 systems and CARB Evergreen-compliant strategies.
Installation & Maintenance Tips
Install snap rings into the intended shaft or bore groove using purpose-built snap ring pliers. Inspect the groove and mating surfaces for wear or burrs before installation. Include the snap ring in scheduled preventive maintenance intervals and replace any ring that shows distortion, corrosion, or loss of spring tension to preserve assembly reliability.
Real-World Applications
This external snap ring secures rotating components on reefer trailers, refrigerated trucks, and auxiliary drive systems — commonly used in tensioner, idler, and clutch assemblies across Thermo King SL, SLX, SLXi, and T-Series units. It supports continuous transport refrigeration service in line-haul and regional delivery fleets.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsBacked by Thermo King’s engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting performance and uptime assurance for fleet operations.
For product verification or service assistance, call (806) 376-5837.
For current warranty eligibility or OEM replacement coverage, please contact us for warranty information or contact the service department for confirmation.
Frequently Asked Questions
Q: Is the Ring Snap 559957 compatible with Thermo King SL series units?
A: Yes, the Ring Snap 559957 fits many Thermo King SL-series assemblies where an external snap ring is specified.
Q: What is the primary function of this snap ring?
A: The snap ring provides axial retention for shafts, bearings, and pulleys to maintain alignment and prevent component movement in refrigeration drive systems.
Q: Can fleets in the Permian Basin get installation support?
A: Yes, West Texas Thermo King offers installation and service support across Amarillo, Lubbock, Odessa, and surrounding West Texas regions.
Related Resources
Ask about fleet-wide parts programs through West Texas Thermo King.
Produced by a certified Thermo King dealership, West Texas Thermo King | a Division of PEAK Industrial. Servicing fleets across Amarillo, Lubbock, and Odessa.