Toro 640 Drive Assembly — 45° Rotary Drive (640-0045)

The Toro 640 Drive Assembly (SKU 640-0045) is the 45° drive component for Toro 640 Series commercial rotary sprinklers. Built for athletic fields, parks and large turf installations, it replaces the rotating drive mechanism to restore reliable, precision performance.

• 45° drive assembly — engineered for a precise 45° part-circle arc and consistent coverage.
• Stainless-steel-encased gear-drive and stainless-steel retraction spring improve durability and service life.
• Standard rubber cover and small exposed surface reduce impact damage and player hazards on turf.
• Standard check valve prevents low-head drainage; pop-up to nozzle is 60 mm (2 3/8").
• Compatible with Toro 640 bodies including Check‑O‑Matic and Valve‑in‑Head; use with five nozzle options and twelve arc settings.
• Adjustment screw allows up to 25% radius reduction; inlet is 1" (25 mm) female-thread; recommended pressure 40–90 psi (2.8–6.2 bar).

This listing includes the drive assembly only; nozzles, stators and full rotor bodies are sold separately. Typical operating radius is 14.6–20.2 m (47–67 ft) with flows from 23.6–92.8 L/min (6.0–25.0 GPM). Consult the Toro 640 Series documentation and a qualified irrigation professional for correct installation and warranty details. The 640 Series is backed by a five-year limited warranty when installed per manufacturer guidelines.