Skilled technicians battle with a stubborn alternator, a crew tackle a high-stakes engine rebuild for a freight train, plus it takes a team of experts to build a massive locomotive underframe.

A loco needs a double bogie change fast to get back to the sugarcane harvest, traction motors from mining trains are getting rebuilds, plus the heat is on for a tricky air conditioner replacement.

A freight train needs an urgent engine replacement after a critical failure, a 132 T loco requires a complex bogie change, plus catch the special forces of rail, the RORU team, in action.