Thermo King SGUM4000 Secondary Spin-On Fuel Filter 903866
Official OEM Thermo King parts catalog entry for the Thermo King Kit SGUM4000 Secondary Fuel Filter (Part 903866), 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 Kit SGUM4000 Secondary Fuel Filter (Part 903866) delivers OEM-grade secondary filtration for temperature-controlled fleets. This component integrates with Thermo King refrigeration systems to protect fuel pumps and injectors, ensuring reliable temperature control across transport refrigeration and reefer trailer operations in West Texas and the Permian Basin.
Thermo King refrigeration system compatibility and factory-calibrated filtration make this kit a core part of preventive maintenance for diesel-powered reefers, generator sets, and APUs servicing long-haul and regional routes through Amarillo, Lubbock, and Odessa.
- High-efficiency media – Captures fine particulates to protect injection systems and extend component life.
- Water separation – Manages fuel-borne water to reduce corrosion and injector damage for improved uptime.
- Corrosion-resistant housing – Coated canister construction resists harsh operating environments across the Southwest.
- Service-friendly design – Spin-on format simplifies replacement during scheduled maintenance.
- OEM fit – Engineered for Thermo King diesel refrigeration units and APUs to ensure secure installation and leak-free operation.
- Fleet ROI – Reduces risk of fuel-system failures and helps maintain fuel-efficient cooling and temperature control.
Product Details
| Part Number | 903866 |
| Product Name | Thermo King Kit SGUM4000 Secondary Fuel Filter |
| Function | Secondary fuel filtration, water separation, particulate removal |
| Compatibility | Thermo King diesel refrigeration units and generator/APU systems, compatible with many SB series and TriPac APU installations and common transport refrigeration platforms |
Efficiency & Sustainability
By maintaining cleaner fuel delivery to injectors and pumps, the SGUM4000 filter kit supports fuel-efficient cooling and reduces the risk of emissions-affecting failures. Integration with Smart Reefer SR-4 and diesel-electric systems supports optimized transport refrigeration operation, and use of OEM filtration contributes to long-term equipment efficiency and sustainability goals.
Installation & Maintenance Tips
Follow OEM guidelines for replacement: lubricate O-rings with clean engine oil, hand-tighten the spin-on filter, and use the threaded ring for removal. Inspect fuel filters during scheduled service intervals and replace per fleet maintenance plans to prevent contamination-related downtime.
Real-World Applications
This secondary fuel filter kit is ideal for reefer trailers, refrigerated straight trucks, refrigerated containers, and Thermo King APUs that run diesel fuel systems. It enhances reliability for fleets operating in extreme heat and dusty conditions typical of West Texas and the Permian Basin.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
Backed 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 this filter compatible with Thermo King TriPac APUs?
A: Yes. The SGUM4000 secondary fuel filter kit is compatible with many TriPac APU installations and other Thermo King diesel refrigeration systems when OEM mounting and connections match.
Q: How often should the secondary fuel filter be serviced?
A: Inspect filters during scheduled maintenance intervals and replace according to operating conditions and fleet service plans; typical severe-duty intervals align with preventive maintenance schedules to maintain filtration efficiency.
Q: What installation practices ensure a proper seal?
A: Lubricate O-rings with clean engine oil, hand-tighten the spin-on cartridge, and avoid using a wrench on the filter body; use the threaded ring for removal as required.
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 Kit SGUM4000 Secondary Fuel Filter (Part 903866), 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 Kit SGUM4000 Secondary Fuel Filter (Part 903866) delivers OEM-grade secondary filtration for temperature-controlled fleets. This component integrates with Thermo King refrigeration systems to protect fuel pumps and injectors, ensuring reliable temperature control across transport refrigeration and reefer trailer operations in West Texas and the Permian Basin.
Thermo King refrigeration system compatibility and factory-calibrated filtration make this kit a core part of preventive maintenance for diesel-powered reefers, generator sets, and APUs servicing long-haul and regional routes through Amarillo, Lubbock, and Odessa.
- High-efficiency media – Captures fine particulates to protect injection systems and extend component life.
- Water separation – Manages fuel-borne water to reduce corrosion and injector damage for improved uptime.
- Corrosion-resistant housing – Coated canister construction resists harsh operating environments across the Southwest.
- Service-friendly design – Spin-on format simplifies replacement during scheduled maintenance.
- OEM fit – Engineered for Thermo King diesel refrigeration units and APUs to ensure secure installation and leak-free operation.
- Fleet ROI – Reduces risk of fuel-system failures and helps maintain fuel-efficient cooling and temperature control.
Product Details
| Part Number | 903866 |
| Product Name | Thermo King Kit SGUM4000 Secondary Fuel Filter |
| Function | Secondary fuel filtration, water separation, particulate removal |
| Compatibility | Thermo King diesel refrigeration units and generator/APU systems, compatible with many SB series and TriPac APU installations and common transport refrigeration platforms |
Efficiency & Sustainability
By maintaining cleaner fuel delivery to injectors and pumps, the SGUM4000 filter kit supports fuel-efficient cooling and reduces the risk of emissions-affecting failures. Integration with Smart Reefer SR-4 and diesel-electric systems supports optimized transport refrigeration operation, and use of OEM filtration contributes to long-term equipment efficiency and sustainability goals.
Installation & Maintenance Tips
Follow OEM guidelines for replacement: lubricate O-rings with clean engine oil, hand-tighten the spin-on filter, and use the threaded ring for removal. Inspect fuel filters during scheduled service intervals and replace per fleet maintenance plans to prevent contamination-related downtime.
Real-World Applications
This secondary fuel filter kit is ideal for reefer trailers, refrigerated straight trucks, refrigerated containers, and Thermo King APUs that run diesel fuel systems. It enhances reliability for fleets operating in extreme heat and dusty conditions typical of West Texas and the Permian Basin.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
Backed 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 this filter compatible with Thermo King TriPac APUs?
A: Yes. The SGUM4000 secondary fuel filter kit is compatible with many TriPac APU installations and other Thermo King diesel refrigeration systems when OEM mounting and connections match.
Q: How often should the secondary fuel filter be serviced?
A: Inspect filters during scheduled maintenance intervals and replace according to operating conditions and fleet service plans; typical severe-duty intervals align with preventive maintenance schedules to maintain filtration efficiency.
Q: What installation practices ensure a proper seal?
A: Lubricate O-rings with clean engine oil, hand-tighten the spin-on cartridge, and avoid using a wrench on the filter body; use the threaded ring for removal as required.
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.