For CAT 236D 242D 246D 262D 272D 259D 279D 289D. For Caterpillar Skid Steers Loaders 236D 242D 246D 262D 272D 259D 279D 289D 299D 299D2. Air Suspension. Air Fuel Ratio Sensor. Air Intake Hose. -Air filter can improve air flow and prevent 98.5% efficiency dirt from entering the engine.