Oshkosh M-4000

The Oshkosh M-4000 crash tender is a 65 ton, 8x8 vehicle that was first fielded in 1978. It carries 4000 gallons of water and 515 gallons of foam, designed for all-weather operations at airfields for fire suppression. Two 1,250 gpm pumps and one 1,200 gpm turret deliver the water and foam. The Oshkosh M-4000 ARFF is powered by two Detroit Diesel engines (8V92T), weighs approximately 115,000 lbs, is 45 feet long, 10 feet wide and 13.8 feet tall.
The M-4000 was the commercial version of the US Air Force P-15 (which carried 6000 gallons of water, and had dual roof turrets.) This resulted in it often being referred to as an "M-15".
The first unit was delivered to the Tulsa International Airport in the fall of 1978.
M-4000