Official OEM Thermo King parts catalog entry for the Thermo King Tank Overflow 120489, 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 Tank Overflow 120489 supports reliable coolant management for temperature-critical transport refrigeration applications, protecting Thermo King refrigeration systems from coolant loss and air ingress while preserving consistent temperature control for reefer trailers and truck-mounted units. This Tank Overflow integrates with Thermo King engine cooling circuits to maintain uptime and reduce service interventions.
Thermo King refrigeration system integrity remains a priority for fleets operating in the high-demand environments of Amarillo, Lubbock, Odessa, and the Permian Basin. The Thermo King Tank Overflow 120489 delivers dependable coolant recovery and visible level monitoring to support long-haul refrigeration duty cycles and maximize ROI through reduced downtime.
| Part Number | 120489 |
| Product Name | Thermo King Tank Overflow 120489 |
| Function | Overflow / Expansion Tank for engine cooling |
| Compatibility | Thermo King engine types including BKD, KD-II, MD-II, RD-II, URD-III and related transport refrigeration units |
The Tank Overflow 120489 supports efficient coolant management that contributes to stable temperature control and fuel-efficient cooling strategies for Thermo King transport refrigeration. By minimizing coolant loss and preventing air introduction to the cooling loop, this component helps maintain system precision and reduce avoidable service events, aligning with fleet sustainability goals and continuous operation in Smart Reefer and diesel-direct electric applications.
Install using OEM-style clamps and ensure hose routing avoids contact with hot exhaust or sharp edges. Inspect the overflow tank and hoses during scheduled maintenance intervals for cracks, discoloration, or loss of level visibility; replace components promptly if signs of deterioration appear. Follow Thermo King service procedures for coolant system pressure and fill protocols.
The Thermo King Tank Overflow 120489 is used on refrigerated trailers, refrigerated trucks, and transport refrigeration genset and engine cooling systems to manage coolant expansion, recovery, and level monitoring. Ideal for regional and long-haul refrigerated fleets operating across West Texas and the Permian Basin, this overflow tank supports continuous temperature control for perishable cargo.
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 reach the service department for confirmation.
Q: Is the Thermo King Tank Overflow 120489 compatible with common Thermo King genset and engine models?
A: Yes. The Tank Overflow 120489 integrates with Thermo King cooling systems on models such as BKD, KD-II, MD-II, RD-II, and URD-III where an overflow reservoir is specified.
Q: How does this overflow tank improve fleet uptime?
A: By capturing expanded coolant and returning it to the cooling system as temperatures normalize, the overflow tank prevents air ingress and coolant loss, reducing the likelihood of overheating events and unplanned roadside service.
Q: What service items should be checked during inspection?
A: Inspect tank integrity, sight level (if visible), hose connections, and clamps during routine cooling system maintenance. Replace hoses and clamps with OEM or OEM-equivalent parts as needed.
Q: Can this part be installed in the field by a fleet technician?
A: Yes. Installation follows standard coolant reservoir procedures: secure hose connections, check routing clearances, and verify coolant level and bleed procedures per Thermo King service guidelines.
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 Tank Overflow 120489, 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 Tank Overflow 120489 supports reliable coolant management for temperature-critical transport refrigeration applications, protecting Thermo King refrigeration systems from coolant loss and air ingress while preserving consistent temperature control for reefer trailers and truck-mounted units. This Tank Overflow integrates with Thermo King engine cooling circuits to maintain uptime and reduce service interventions.
Thermo King refrigeration system integrity remains a priority for fleets operating in the high-demand environments of Amarillo, Lubbock, Odessa, and the Permian Basin. The Thermo King Tank Overflow 120489 delivers dependable coolant recovery and visible level monitoring to support long-haul refrigeration duty cycles and maximize ROI through reduced downtime.
| Part Number | 120489 |
| Product Name | Thermo King Tank Overflow 120489 |
| Function | Overflow / Expansion Tank for engine cooling |
| Compatibility | Thermo King engine types including BKD, KD-II, MD-II, RD-II, URD-III and related transport refrigeration units |
The Tank Overflow 120489 supports efficient coolant management that contributes to stable temperature control and fuel-efficient cooling strategies for Thermo King transport refrigeration. By minimizing coolant loss and preventing air introduction to the cooling loop, this component helps maintain system precision and reduce avoidable service events, aligning with fleet sustainability goals and continuous operation in Smart Reefer and diesel-direct electric applications.
Install using OEM-style clamps and ensure hose routing avoids contact with hot exhaust or sharp edges. Inspect the overflow tank and hoses during scheduled maintenance intervals for cracks, discoloration, or loss of level visibility; replace components promptly if signs of deterioration appear. Follow Thermo King service procedures for coolant system pressure and fill protocols.
The Thermo King Tank Overflow 120489 is used on refrigerated trailers, refrigerated trucks, and transport refrigeration genset and engine cooling systems to manage coolant expansion, recovery, and level monitoring. Ideal for regional and long-haul refrigerated fleets operating across West Texas and the Permian Basin, this overflow tank supports continuous temperature control for perishable cargo.
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 reach the service department for confirmation.
Q: Is the Thermo King Tank Overflow 120489 compatible with common Thermo King genset and engine models?
A: Yes. The Tank Overflow 120489 integrates with Thermo King cooling systems on models such as BKD, KD-II, MD-II, RD-II, and URD-III where an overflow reservoir is specified.
Q: How does this overflow tank improve fleet uptime?
A: By capturing expanded coolant and returning it to the cooling system as temperatures normalize, the overflow tank prevents air ingress and coolant loss, reducing the likelihood of overheating events and unplanned roadside service.
Q: What service items should be checked during inspection?
A: Inspect tank integrity, sight level (if visible), hose connections, and clamps during routine cooling system maintenance. Replace hoses and clamps with OEM or OEM-equivalent parts as needed.
Q: Can this part be installed in the field by a fleet technician?
A: Yes. Installation follows standard coolant reservoir procedures: secure hose connections, check routing clearances, and verify coolant level and bleed procedures per Thermo King service guidelines.
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.
