Disclosed is an electronic air pressure valve and control assembly for a swing yarder comprising: two electronic air pressure valves adapted to control braking pressure of two swing yarder winch drums and a control means configured to split an electrical signal into two separate electrical signals wherein each signal controls a different electronic air pressure valve the assembly being arranged such that when in use with a swing yarder the assembly allows an operator to adjust the breaking pressure of the two winch drums without having to pause or stop the operation of the yarder. The assembly has a reduced number of components than know swing yarder valve assemblies and makes the yarder more efficient.
