Thermo King Transport Refrigeration Coupling O-Ring 330544
Official OEM Thermo King parts catalog entry for the O Ring, Coupling 330544, 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 O Ring, Coupling 330544 delivers precise sealing for Thermo King refrigeration systems. West Texas Thermo King, a certified Thermo King dealership, specifies this OEM coupling O-ring to maintain tight refrigerant and coolant connections across transport refrigeration applications, protecting uptime and fleet ROI in Amarillo, Lubbock, Odessa, and the Permian Basin.
Thermo King refrigeration system compatibility and reliable sealing ensure temperature control integrity on reefer trailers and refrigerated trucks across long-haul and local routes.
- OEM Fit – Ensures a secure, leak-free connection within Thermo King coupling assemblies for consistent temperature control.
- Precision Seal – Maintains refrigerant and coolant containment to protect system efficiency and reduce unplanned downtime.
- Fleet Compatibility – Supports common Thermo King models used in transport refrigeration, enabling consistent parts management and faster service.
- Service-Ready – Supplied individually for targeted maintenance and fast replacement during scheduled service intervals.
- Uptime Focused – Minimizes service time and preserves operational availability for refrigerated loads across West Texas routes.
Product Details
| Part Number | 330544 |
| Product Name | O Ring, Coupling 330544 |
| Compatibility | Thermo King D1, D3, RT, RTII, SBI, SBII, SBIII, Sentry and select transport refrigeration applications |
| Sold As | Single O-ring for coupling assemblies |
Efficiency & Sustainability
This OEM O-ring supports fuel-efficient cooling and precise temperature control by maintaining refrigerant integrity in Thermo King units. Proper sealing reduces refrigerant loss and helps Thermo King systems—including those operating with Smart Reefer SR-4 strategies—deliver predictable temperature performance and longer service intervals, supporting environmental stewardship and cost-efficient fleet operation.
Installation & Maintenance Tips
Install using OEM-recommended procedures and hardware for a secure fit. Inspect coupling seals during scheduled maintenance and replace any O-ring that shows wear, cuts, or deformation. Use OEM clamps and lubricants approved by Thermo King to avoid seal damage and ensure correct seating during installation.
Real-World Applications
The O Ring, Coupling 330544 sits at critical connection points in reefer trailers, refrigerated trucks, and Diesel Direct Electric or electric-assist systems. Fleet technicians use this part during routine service and emergency repairs to restore temperature control and protect perishable cargo from spoilage. 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, contact us for warranty information: contact.
Frequently Asked Questions
Q: Is the O Ring, Coupling 330544 compatible with common Thermo King units?
A: Yes. It fits coupling assemblies on Thermo King units such as D1, D3, RT series, SB series, Sentry, and other specified transport refrigeration models.
Q: How does replacing this O-ring affect fleet performance?
A: Replacing a worn coupling O-ring restores leak-free connections, preserves refrigerant charge, and supports consistent temperature control, improving overall efficiency and reducing risk of cargo loss.
Q: Can a technician install this part in the field?
A: Yes. Certified technicians install this OEM O-ring during routine maintenance or repair. Follow Thermo King installation guidelines and use approved clamps and lubricants.
Q: Where can fleets get this part and professional service?
A: West Texas Thermo King supplies this part and provides certified installation and service across Amarillo, Lubbock, Odessa, and the wider West Texas region.
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 O Ring, Coupling 330544, 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 O Ring, Coupling 330544 delivers precise sealing for Thermo King refrigeration systems. West Texas Thermo King, a certified Thermo King dealership, specifies this OEM coupling O-ring to maintain tight refrigerant and coolant connections across transport refrigeration applications, protecting uptime and fleet ROI in Amarillo, Lubbock, Odessa, and the Permian Basin.
Thermo King refrigeration system compatibility and reliable sealing ensure temperature control integrity on reefer trailers and refrigerated trucks across long-haul and local routes.
- OEM Fit – Ensures a secure, leak-free connection within Thermo King coupling assemblies for consistent temperature control.
- Precision Seal – Maintains refrigerant and coolant containment to protect system efficiency and reduce unplanned downtime.
- Fleet Compatibility – Supports common Thermo King models used in transport refrigeration, enabling consistent parts management and faster service.
- Service-Ready – Supplied individually for targeted maintenance and fast replacement during scheduled service intervals.
- Uptime Focused – Minimizes service time and preserves operational availability for refrigerated loads across West Texas routes.
Product Details
| Part Number | 330544 |
| Product Name | O Ring, Coupling 330544 |
| Compatibility | Thermo King D1, D3, RT, RTII, SBI, SBII, SBIII, Sentry and select transport refrigeration applications |
| Sold As | Single O-ring for coupling assemblies |
Efficiency & Sustainability
This OEM O-ring supports fuel-efficient cooling and precise temperature control by maintaining refrigerant integrity in Thermo King units. Proper sealing reduces refrigerant loss and helps Thermo King systems—including those operating with Smart Reefer SR-4 strategies—deliver predictable temperature performance and longer service intervals, supporting environmental stewardship and cost-efficient fleet operation.
Installation & Maintenance Tips
Install using OEM-recommended procedures and hardware for a secure fit. Inspect coupling seals during scheduled maintenance and replace any O-ring that shows wear, cuts, or deformation. Use OEM clamps and lubricants approved by Thermo King to avoid seal damage and ensure correct seating during installation.
Real-World Applications
The O Ring, Coupling 330544 sits at critical connection points in reefer trailers, refrigerated trucks, and Diesel Direct Electric or electric-assist systems. Fleet technicians use this part during routine service and emergency repairs to restore temperature control and protect perishable cargo from spoilage. 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, contact us for warranty information: contact.
Frequently Asked Questions
Q: Is the O Ring, Coupling 330544 compatible with common Thermo King units?
A: Yes. It fits coupling assemblies on Thermo King units such as D1, D3, RT series, SB series, Sentry, and other specified transport refrigeration models.
Q: How does replacing this O-ring affect fleet performance?
A: Replacing a worn coupling O-ring restores leak-free connections, preserves refrigerant charge, and supports consistent temperature control, improving overall efficiency and reducing risk of cargo loss.
Q: Can a technician install this part in the field?
A: Yes. Certified technicians install this OEM O-ring during routine maintenance or repair. Follow Thermo King installation guidelines and use approved clamps and lubricants.
Q: Where can fleets get this part and professional service?
A: West Texas Thermo King supplies this part and provides certified installation and service across Amarillo, Lubbock, Odessa, and the wider West Texas region.
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.