Thermo King Cogged Chloroprene Alternator Belt (Trailer) 781341
Official OEM Thermo King parts catalog entry for the Thermo King Belt, Alternator (Trailer) 781341, 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 Belt, Alternator (Trailer) 781341 delivers OEM-grade reliability for Thermo King refrigeration systems and reefer trailer fleets. Engineered to drive alternators and auxiliary components with consistent efficiency, this belt supports uptime and dependable temperature control across transport refrigeration applications.
Product Overview
The Thermo King Belt, Alternator (Trailer) 781341 is a cogged, chloroprene alternator belt designed for trailer refrigeration units. It ensures secure power delivery to charging systems and accessory drives on SB series refrigeration units and compatible engine configurations, maintaining electrical output and cooling under demanding duty cycles.
Key Features & Customer Benefits
- Chloroprene Construction – Delivers heat and stretch resistance for extended service life under heavy loads.
- Cogged (Toothed) Design – Improves grip and reduces slippage for precise accessory drive operation.
- Wide Temperature Capability – Operates across extreme ambient ranges to support reliable reefer performance.
- OEM Fitment – Matches Thermo King component specifications to ensure correct installation and minimal downtime.
- Alternator & Accessory Use – Drives alternators and, where specified, water pumps or fans to maintain electrical generation and cooling.
- Fleet Uptime – Reduces unscheduled stops through consistent belt behavior and predictable maintenance intervals.
Product Details
| Part Number | 781341 |
| Part Name | Belt, Alternator (Trailer) |
| Material | Chloroprene |
| Design | Industrial cogged (toothed) alternator belt |
| Typical Applications | Alternator drive; auxiliary water pump or fan on select Thermo King units |
| Compatibility | Thermo King SB-II, SB-III, SB-110/200/300/400 series; common fit with Yanmar 482/486 and similar engines |
| Temperature Range | -70°F to 250°F |
Efficiency & Sustainability
Reduced slippage and consistent tension support fuel-efficient cooling across transport refrigeration systems. When integrated into properly configured Thermo King systems — including Smart Reefer SR-4 and Diesel Direct Electric platforms — this belt contributes to predictable energy use and compliance pathways such as CARB Evergreen for fleet sustainability initiatives.
Installation & Maintenance Tips
Install with OEM belt routing and clamps for secure fitment. Verify proper tension during scheduled maintenance intervals and inspect for fraying, glazing, or cracking. Replace belts at first sign of wear to maintain alternator output and prevent downstream system interruptions. Certified West Texas Thermo King technicians handle installation and torque specifications for fleet-grade reliability.
Real-World Applications
This alternator belt serves reefer trailers, refrigerated trucks, and transport refrigeration units that rely on Thermo King SB-series components to maintain temperature control in long-haul and regional routes. It supports continuous battery charging and accessory drives essential to temperature-controlled freight across the Permian Basin and West Texas markets.
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, contact us for warranty information or visit https://www.trailerservicesofwesttexas.com/contact to speak with the service department.
Frequently Asked Questions
Q: Is this belt compatible with Thermo King SB-series units?
A: Yes. This belt fits SB-II, SB-III, and SB-110/200/300/400 series units and common engine configurations listed by Thermo King.
Q: Can this belt drive alternators and water pumps?
A: Yes. The cogged design supports alternator drives and specified accessory duties such as water pumps or fans in compatible trailer refrigeration setups.
Q: How often should fleets inspect or replace this belt?
A: Inspect belts at scheduled intervals and during routine service; replace at first signs of wear to preserve alternator output and refrigeration reliability.
Related Resources
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 Belt, Alternator (Trailer) 781341, 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 Belt, Alternator (Trailer) 781341 delivers OEM-grade reliability for Thermo King refrigeration systems and reefer trailer fleets. Engineered to drive alternators and auxiliary components with consistent efficiency, this belt supports uptime and dependable temperature control across transport refrigeration applications.
Product Overview
The Thermo King Belt, Alternator (Trailer) 781341 is a cogged, chloroprene alternator belt designed for trailer refrigeration units. It ensures secure power delivery to charging systems and accessory drives on SB series refrigeration units and compatible engine configurations, maintaining electrical output and cooling under demanding duty cycles.
Key Features & Customer Benefits
- Chloroprene Construction – Delivers heat and stretch resistance for extended service life under heavy loads.
- Cogged (Toothed) Design – Improves grip and reduces slippage for precise accessory drive operation.
- Wide Temperature Capability – Operates across extreme ambient ranges to support reliable reefer performance.
- OEM Fitment – Matches Thermo King component specifications to ensure correct installation and minimal downtime.
- Alternator & Accessory Use – Drives alternators and, where specified, water pumps or fans to maintain electrical generation and cooling.
- Fleet Uptime – Reduces unscheduled stops through consistent belt behavior and predictable maintenance intervals.
Product Details
| Part Number | 781341 |
| Part Name | Belt, Alternator (Trailer) |
| Material | Chloroprene |
| Design | Industrial cogged (toothed) alternator belt |
| Typical Applications | Alternator drive; auxiliary water pump or fan on select Thermo King units |
| Compatibility | Thermo King SB-II, SB-III, SB-110/200/300/400 series; common fit with Yanmar 482/486 and similar engines |
| Temperature Range | -70°F to 250°F |
Efficiency & Sustainability
Reduced slippage and consistent tension support fuel-efficient cooling across transport refrigeration systems. When integrated into properly configured Thermo King systems — including Smart Reefer SR-4 and Diesel Direct Electric platforms — this belt contributes to predictable energy use and compliance pathways such as CARB Evergreen for fleet sustainability initiatives.
Installation & Maintenance Tips
Install with OEM belt routing and clamps for secure fitment. Verify proper tension during scheduled maintenance intervals and inspect for fraying, glazing, or cracking. Replace belts at first sign of wear to maintain alternator output and prevent downstream system interruptions. Certified West Texas Thermo King technicians handle installation and torque specifications for fleet-grade reliability.
Real-World Applications
This alternator belt serves reefer trailers, refrigerated trucks, and transport refrigeration units that rely on Thermo King SB-series components to maintain temperature control in long-haul and regional routes. It supports continuous battery charging and accessory drives essential to temperature-controlled freight across the Permian Basin and West Texas markets.
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, contact us for warranty information or visit https://www.trailerservicesofwesttexas.com/contact to speak with the service department.
Frequently Asked Questions
Q: Is this belt compatible with Thermo King SB-series units?
A: Yes. This belt fits SB-II, SB-III, and SB-110/200/300/400 series units and common engine configurations listed by Thermo King.
Q: Can this belt drive alternators and water pumps?
A: Yes. The cogged design supports alternator drives and specified accessory duties such as water pumps or fans in compatible trailer refrigeration setups.
Q: How often should fleets inspect or replace this belt?
A: Inspect belts at scheduled intervals and during routine service; replace at first signs of wear to preserve alternator output and refrigeration reliability.
Related Resources
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.