The John Deere Secondary Drive Belt 42RD – M170986 is a genuine OEM V-belt designed for select John Deere riding mowers and lawn tractors. Engineered to transmit power smoothly between the engine pulley and secondary drive components, this belt helps ensure reliable drive engagement, consistent speed control and efficient mower operation — ideal for users who want dependable performance and minimal downtime during regular lawn care and landscaping tasks.

Manufactured to John Deere’s original specifications, this secondary drive belt features reinforced materials and high-quality internal cords that resist stretching, wear and heat under load. Its precisely engineered profile helps maintain correct tension, reduces slippage and delivers stable power transfer across compatible drive systems.

Key Features

Genuine OEM V-Belt – Made to John Deere original specifications for dependable fit and performance.

Secondary Drive Design – Engineered for power transmission between primary and secondary drive pulleys.

Reinforced Construction – Durable materials resist wear, heat and stretching under load.

Stable Power Delivery – Helps maintain smooth drive engagement and consistent operation.

Part Reference: M170986 – Confirms accurate John Deere part number.

---

Suitable Machines / Compatible Equipment

This John Deere M170986 Secondary Drive Belt (42RD) is designed for use on specific John Deere lawn tractors and ride-on mowers that specify this belt in their parts list.

Typical Compatible John Deere Models

• John Deere D130 Lawn Tractor

• John Deere D140 Lawn Tractor

• John Deere D150 Lawn Tractor

• John Deere D160 Lawn Tractor

• John Deere GT225 Lawn Tractor

• John Deere GT235 Lawn Tractor

Fitment Tip: Always consult your machine’s model, belt routing diagram and parts manual before ordering — using the correct belt reference ensures proper tension, correct fit and optimal performance.

---

Product Details

Product Type: Secondary Drive Belt / V-Belt
Part Reference: M170986
Belt Profile: V-style drive belt
Application: Power transmission in secondary drive system
Function: Transfers engine power to secondary driven components

---

Why Choose This Drive Belt

The John Deere M170986 Secondary Drive Belt (42RD) is an excellent choice when replacing a worn, stretched or damaged belt in your mower’s secondary drive system. Its genuine OEM quality ensures precise fitment and reliable power transfer that helps maintain smooth operation, reduce maintenance issues and extend component life compared with generic alternatives.