From the Winfield Fire Protection District Facebook page:

Engine 31 which is our only operational fire engine is going back to the factory for a major overhaul of the engine, pump, mechanical systems and rotting frame rails. Our only fire apparatus left is Tender 31, which was designed to haul water to areas with no hydrants. With repairs to Engine 31 expected to take 3-6 months and no reserve fire apparatus, the West Chicago Fire District loaned us their engine that has been retired from service because it is 27 years old. So when you see a West Chicago vehicle driving around Winfield this is the reason.

Winfield Fire Protection District fire engine

Winfield Fire Protection District photo

West Chicago FPD loans spare engine to the Winfield Fire Protection District fire

Winfield Fire Protection District photo

West Chicago FPD loans spare engine to the Winfield Fire Protection District fire

Winfield Fire Protection District photo

thanks Danny