Thermo King OEM Dipstick Oil O-Ring 35 mm Seal 334090
Official OEM Thermo King parts catalog entry for the Thermo King O-Ring 334090, 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 334090 provides OEM-grade sealing for dipstick applications in Thermo King refrigeration systems, preventing fluid leaks and preserving temperature control integrity across transport refrigeration fleets. This precision-fit seal supports uptime and reduces service interruptions for refrigerated trailers and trucks.
Thermo King refrigeration system compatibility ensures reliable sealing where oil retention and contamination prevention are critical to efficient, long-lasting operation.
- Precision Fit – Designed for dipstick sealing in Thermo King models to ensure leak-free operation.
- OEM Specification – Manufactured to Thermo King standards for consistent durability and compatibility.
- 35 mm Diameter – Sized for oil dipstick applications to deliver a secure seal in targeted assemblies.
- Leak Prevention – Maintains system integrity and reduces downtime associated with oil loss and contamination.
- Wide Model Compatibility – Supports multiple Thermo King units used across reefer trailers and refrigerated trucks.
- Low-Maintenance – Long service life when inspected during routine maintenance intervals, lowering total cost of ownership.
Product Details
| Part Number | 334090 |
| Product | O-Ring |
| Application | Dipstick oil seal |
| Measurement | 35 mm (diameter) |
| Compatibility | Thermo King SB-200, SB-210, SB-230, SB-310, SB-330, SB-3, SLX 400, SUPER-2, Precedent |
Material specifications are per Thermo King OEM standards to withstand exposure typical of transport refrigeration systems. Exact compound details follow Thermo King manufacturing specifications and OEM quality control.
Efficiency & Sustainability
This O-Ring supports efficient temperature control and helps maintain fuel-efficient cooling by preventing fluid loss in Thermo King units, including applications with Diesel Direct Electric and Smart Reefer SR-4 systems. Proper sealing reduces waste and supports longer component life, aligning with CARB Evergreen goals for sustainable fleet operation where applicable.
Installation & Maintenance Tips
Install using OEM service procedures and inspect the seal during scheduled maintenance intervals. Replace the O-Ring if signs of wear, hardening, or deformation appear. Use recommended Thermo King clamps and fittings to maintain secure assembly and leak-free performance.
Real-World Applications
The Thermo King O-Ring 334090 is ideal for refrigerated trailers, reefer trucks, and transport refrigeration units where reliable dipstick sealing preserves oil systems and maintains consistent temperature control for perishable cargo. It supports fleet operations across regional routes and long-haul service in demanding West Texas conditions.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
Backed by Thermo King engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting reliability 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 this O-Ring compatible with Precedent units?
A: Yes. The Thermo King O-Ring 334090 fits Precedent and several SB-series models for dipstick sealing and reliable oil retention.
Q: How often should the O-Ring be inspected?
A: Inspect during routine service intervals and whenever the dipstick assembly is accessed; replace if there is visible wear, cracking, or hardening.
Q: Can this part improve fleet uptime?
A: Yes. Proper sealing prevents leaks that cause downtime and component damage, supporting consistent temperature control and fleet reliability.
Q: Where is this part installed?
A: The O-Ring installs at the dipstick interface on compatible Thermo King refrigeration units to seal oil passages and prevent contamination or loss.
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 Thermo King O-Ring 334090, 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 334090 provides OEM-grade sealing for dipstick applications in Thermo King refrigeration systems, preventing fluid leaks and preserving temperature control integrity across transport refrigeration fleets. This precision-fit seal supports uptime and reduces service interruptions for refrigerated trailers and trucks.
Thermo King refrigeration system compatibility ensures reliable sealing where oil retention and contamination prevention are critical to efficient, long-lasting operation.
- Precision Fit – Designed for dipstick sealing in Thermo King models to ensure leak-free operation.
- OEM Specification – Manufactured to Thermo King standards for consistent durability and compatibility.
- 35 mm Diameter – Sized for oil dipstick applications to deliver a secure seal in targeted assemblies.
- Leak Prevention – Maintains system integrity and reduces downtime associated with oil loss and contamination.
- Wide Model Compatibility – Supports multiple Thermo King units used across reefer trailers and refrigerated trucks.
- Low-Maintenance – Long service life when inspected during routine maintenance intervals, lowering total cost of ownership.
Product Details
| Part Number | 334090 |
| Product | O-Ring |
| Application | Dipstick oil seal |
| Measurement | 35 mm (diameter) |
| Compatibility | Thermo King SB-200, SB-210, SB-230, SB-310, SB-330, SB-3, SLX 400, SUPER-2, Precedent |
Material specifications are per Thermo King OEM standards to withstand exposure typical of transport refrigeration systems. Exact compound details follow Thermo King manufacturing specifications and OEM quality control.
Efficiency & Sustainability
This O-Ring supports efficient temperature control and helps maintain fuel-efficient cooling by preventing fluid loss in Thermo King units, including applications with Diesel Direct Electric and Smart Reefer SR-4 systems. Proper sealing reduces waste and supports longer component life, aligning with CARB Evergreen goals for sustainable fleet operation where applicable.
Installation & Maintenance Tips
Install using OEM service procedures and inspect the seal during scheduled maintenance intervals. Replace the O-Ring if signs of wear, hardening, or deformation appear. Use recommended Thermo King clamps and fittings to maintain secure assembly and leak-free performance.
Real-World Applications
The Thermo King O-Ring 334090 is ideal for refrigerated trailers, reefer trucks, and transport refrigeration units where reliable dipstick sealing preserves oil systems and maintains consistent temperature control for perishable cargo. It supports fleet operations across regional routes and long-haul service in demanding West Texas conditions.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
Backed by Thermo King engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting reliability 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 this O-Ring compatible with Precedent units?
A: Yes. The Thermo King O-Ring 334090 fits Precedent and several SB-series models for dipstick sealing and reliable oil retention.
Q: How often should the O-Ring be inspected?
A: Inspect during routine service intervals and whenever the dipstick assembly is accessed; replace if there is visible wear, cracking, or hardening.
Q: Can this part improve fleet uptime?
A: Yes. Proper sealing prevents leaks that cause downtime and component damage, supporting consistent temperature control and fleet reliability.
Q: Where is this part installed?
A: The O-Ring installs at the dipstick interface on compatible Thermo King refrigeration units to seal oil passages and prevent contamination or loss.
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.