Thermo King Retrofit Alternator Assembly SG-4000 UM 903764
Official OEM Thermo King parts catalog entry for the Kit Retrofit Alternator SG4000 - UM, 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 Retrofit Alternator SG4000 - UM upgrades or replaces alternator assemblies in Thermo King refrigeration systems to maintain reliable 12V charging and electrical support for reefer electronics and battery systems.
Why it matters: Fleets depend on steady electrical power to protect cargo temperature, preserve uptime, and support fuel-efficient cooling strategies across refrigerated trailers and truck-mounted units in West Texas and the Permian Basin.
Key Features & Customer Benefits
- Direct-fit Compatibility – Designed for SG-4000 undermount genset installations to simplify retrofit or replacement and reduce downtime.
- 12V Electrical Support – Ensures consistent charging for batteries and reliable power for controllers and telematics in Thermo King transport refrigeration equipment.
- OEM-quality Components – Uses materials and assembly methods consistent with Thermo King standards to preserve reliability and fleet longevity.
- Serviceability – Enables straightforward removal and installation as a single assembly to accelerate field repairs and scheduled maintenance.
- Vibration-resistant Fit – Engineered to align with factory dowel locations and mounting interfaces to prevent premature bearing wear and electrical faults.
- Fleet Uptime Focus – Supports dependable temperature control and reduces risk of cargo loss for refrigerated trailers and truck-mounted reefers.
Product Details
| Part Number | 903764 |
| Product Name | Kit Retrofit Alternator SG4000 - UM |
| Compatibility | Thermo King SG-4000 undermount genset applications and associated 12V systems |
| Application | Transport refrigeration — reefer trailers, truck-mounted units, undermount gensets |
Efficiency & Sustainability
This alternator retrofit supports efficient electrical charging strategies that contribute to fuel-efficient cooling operations. When integrated with Thermo King systems such as Smart Reefer SR-4 and Diesel Direct Electric architectures, the alternator helps fleets manage energy use and align with emissions-aware practices like CARB Evergreen initiatives where applicable.
Installation & Maintenance Tips
Install as a single assembly following Thermo King service procedures. Align dowel pins and mounting faces, use OEM fasteners, and follow published torque specifications to prevent vibration and bearing stress. Inspect electrical connections and belts during scheduled maintenance intervals and use OEM wiring and clamps for secure fitment.
Real-World Applications
The Kit Retrofit Alternator SG4000 - UM serves refrigerated trailers, truck-mounted reefers, and other transport refrigeration systems that rely on the SG-4000 undermount genset. It delivers reliable charging and electrical support for temperature control electronics, telematics, and battery systems across long-haul and regional routes.
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 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, contact us for warranty information or reach our service team via contact.
Frequently Asked Questions
Q: Is this alternator compatible with Thermo King SG-4000 undermount gensets?
A: Yes. The kit is designed for direct compatibility with SG-4000 undermount genset installations and associated 12V electrical systems.
Q: Can this retrofit reduce downtime for a fleet operating in the Permian Basin?
A: Yes. The direct-fit design and single-assembly serviceability enable faster field repairs and scheduled maintenance, supporting higher fleet uptime across Amarillo, Lubbock, Odessa, and West Texas.
Q: What maintenance steps protect alternator life?
A: Inspect mounting alignment, wiring connections, belts, and drive components at regular intervals and follow Thermo King torque and service procedures to ensure long-term reliability.
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 Kit Retrofit Alternator SG4000 - UM, 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 Retrofit Alternator SG4000 - UM upgrades or replaces alternator assemblies in Thermo King refrigeration systems to maintain reliable 12V charging and electrical support for reefer electronics and battery systems.
Why it matters: Fleets depend on steady electrical power to protect cargo temperature, preserve uptime, and support fuel-efficient cooling strategies across refrigerated trailers and truck-mounted units in West Texas and the Permian Basin.
Key Features & Customer Benefits
- Direct-fit Compatibility – Designed for SG-4000 undermount genset installations to simplify retrofit or replacement and reduce downtime.
- 12V Electrical Support – Ensures consistent charging for batteries and reliable power for controllers and telematics in Thermo King transport refrigeration equipment.
- OEM-quality Components – Uses materials and assembly methods consistent with Thermo King standards to preserve reliability and fleet longevity.
- Serviceability – Enables straightforward removal and installation as a single assembly to accelerate field repairs and scheduled maintenance.
- Vibration-resistant Fit – Engineered to align with factory dowel locations and mounting interfaces to prevent premature bearing wear and electrical faults.
- Fleet Uptime Focus – Supports dependable temperature control and reduces risk of cargo loss for refrigerated trailers and truck-mounted reefers.
Product Details
| Part Number | 903764 |
| Product Name | Kit Retrofit Alternator SG4000 - UM |
| Compatibility | Thermo King SG-4000 undermount genset applications and associated 12V systems |
| Application | Transport refrigeration — reefer trailers, truck-mounted units, undermount gensets |
Efficiency & Sustainability
This alternator retrofit supports efficient electrical charging strategies that contribute to fuel-efficient cooling operations. When integrated with Thermo King systems such as Smart Reefer SR-4 and Diesel Direct Electric architectures, the alternator helps fleets manage energy use and align with emissions-aware practices like CARB Evergreen initiatives where applicable.
Installation & Maintenance Tips
Install as a single assembly following Thermo King service procedures. Align dowel pins and mounting faces, use OEM fasteners, and follow published torque specifications to prevent vibration and bearing stress. Inspect electrical connections and belts during scheduled maintenance intervals and use OEM wiring and clamps for secure fitment.
Real-World Applications
The Kit Retrofit Alternator SG4000 - UM serves refrigerated trailers, truck-mounted reefers, and other transport refrigeration systems that rely on the SG-4000 undermount genset. It delivers reliable charging and electrical support for temperature control electronics, telematics, and battery systems across long-haul and regional routes.
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 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, contact us for warranty information or reach our service team via contact.
Frequently Asked Questions
Q: Is this alternator compatible with Thermo King SG-4000 undermount gensets?
A: Yes. The kit is designed for direct compatibility with SG-4000 undermount genset installations and associated 12V electrical systems.
Q: Can this retrofit reduce downtime for a fleet operating in the Permian Basin?
A: Yes. The direct-fit design and single-assembly serviceability enable faster field repairs and scheduled maintenance, supporting higher fleet uptime across Amarillo, Lubbock, Odessa, and West Texas.
Q: What maintenance steps protect alternator life?
A: Inspect mounting alignment, wiring connections, belts, and drive components at regular intervals and follow Thermo King torque and service procedures to ensure long-term reliability.
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.