450G - BULLDOZER 3015 CONTROLS LINKAGE Parts group 3015 CONTROLS LINKAGE 3015 CONTROLS LINKAGE . Winch Control Valve Linkage (Model 4000 Standard Winch) Winch Control Valve Linkage (Model 4000 Power-In/Power-Out Winch) Shift Quadrant Boot And Protective Edging (For Units Equipped With Cab And Model 4000 Winch)