Title:
V BELT 45.5 (KU-RD15842920)
Description:
Maintain reliable engine performance with the V BELT 45.5 (KU-RD15842920) — a genuine Kubota OEM-spec alternator / fan drive belt engineered for compact construction and utility equipment.
This belt is designed to efficiently transfer power between the engine crankshaft and critical components such as the alternator and cooling fan, ensuring consistent charging and optimal engine temperature control. Built with high-strength rubber compounds and reinforced tensile cords, it offers excellent resistance to heat, stretching, and wear under continuous operation.
Its precision profile ensures proper pulley engagement, reducing slippage, vibration, and premature belt failure. Whether for routine servicing or breakdown repair, this belt delivers dependable performance, reduced downtime, and extended service life.
Model Fitment:
Mini Excavators
- KX040-4
- KX040-4CA
- KX040-4 (Sunbelt variants)
- U48-5
Common compact excavators using this belt for alternator/fan drive systems
Tractor Loader Backhoe
Used within engine cooling and alternator assemblies
Additional Compatible Equipment
- KX033-4 (application-dependent)
- Other KX / U series machines with matching engine setup
Fitment depends on engine configuration and pulley layout
Application Overview
- Alternator drive (charging system)
- Engine cooling fan drive
- Auxiliary engine component drive
Critical for maintaining battery charging and engine cooling efficiency
Part Details:
- Part Number: RD158-42920
- Product Type: V-Belt (Fan / Alternator)
- Length: 45.5 inches
- Construction: Reinforced rubber with high-tensile cords
- Weight: ~0.27–0.30 lbs
- Application: Engine accessory drive
- Installation: Direct OEM replacement
