The iconic Ghan needs some bogies changed fast, a routine wheel lathe job hits a snag, plus an 80 year old steam loco climbs a mountain for a special anniversary.

The Spirit of Queensland's maintenance team race to change a bogie, the construction of a freight locomotive nears completion.

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 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.

A commuter train undergoes a tough traction motor replacement, one maintenance team takes on two huge jobs, plus a leaky torque seal sidelines a sugarcane loco urgently needed for the harvest.