Water Pump Belt 78-1492 Fit for Thermo King MD-100 MD-200 MD-300 w/TK 370 Engine

Water Pump Belt for Thermo King MD-100 MD-200 MD-300 w/TK 370 Engine

This water pump belt, cross-referenced as 78-1492, is a drive belt designed for Thermo King MD-100, MD-200, and MD-300 units with the TK 370 engine, enabling correct water pump rotation for engine cooling.

Overview

This water pump belt 78-1492 is a replacement drive belt engineered for Thermo King MD series transport refrigeration units, including the MD-100, MD-200, and MD-300 models. It drives the water pump off the TK 370 engine, keeping coolant flowing to prevent overheating during operation. This water pump belt 78-1492 meets the dimensional and material requirements for a secure, dependable fit.

Built For Performance

• Matches OEM cross-reference 78-1492 for precise dimensions
• Reinforced cord construction resists stretching and breaking
• Heat-resistant rubber compound withstands engine compartment temperatures
• Flexible build allows proper tracking on multi-rib pulleys
• Provides reliable power transmission even under heavy load
• Simple to install with no special tools required

Fits These Machines

• for Thermo King MD-100
• for Thermo King MD-200
• for Thermo King MD-300

On-The-Job Use

• Keeps engine coolant circulating during refrigerated transport runs
• Suitable for straight trucks and trailer-mounted refrigeration units
• Replacement when belt squeaks, cracks, or becomes loose
• Works in continuous stop-and-go delivery applications

Specs At A Glance

Good To Know

Q: How do I know if this belt needs replacement? A: Inspect the belt for cracks, glazing on the ribs, or visible wear. A squealing noise from the engine area often indicates a worn or loose belt that should be replaced.

Q: Will this belt work with a different Thermo King engine model? A: This belt is designed specifically for the TK 370 engine found in MD series units. Verify your engine model and belt routing before ordering to avoid fitment issues.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.