The Knob Parking Brake Valve (part number 90011592) is a quality replacement parking brake valve for the braking system on Kalmar Ottawa terminal tractors and yard trucks. Sourced to meet or exceed Kalmar Ottawa OEM specifications, this part delivers dependable performance in the demanding conditions of warehouse, distribution center, and port operations. Weight: 0.1 lbs. Dimensions: 4" × 4" × 4". Yard Truck Specialists has been supplying genuine terminal tractor parts since 1986 — every order ships fast from our Pennsylvania warehouses with expert support available.