Re check that the motor gears are meshing properly with the nylon gears + motor bolts are tight.

• Lightly oil the nylon gears, axles and axle boxes with a thin oil.

• With the chassis on blocks, to keep the wheels off the ground connect the batteries. Slowly put power to the motors. If the two wheel sets are not moving in the same direction swap over one set ofmotor wires in the connecting block for that bogie.

  If the wheels in one bogie are turning in a different direction to the other then reverse the spade connectors from that bogie, on the control board. Turning the bogie 180° does not work.

• The 4qd controller has a safety feature of only putting half power out in reverse. To check you have the motors connected the right way round turn the controller up until the wheels just start to turn in the forwards direction. Then flip the reverse switch. If the wheels do not turn then you have it correctly wired. If the wheels do turn in the other direction but faster then they are wired up wrong way round.

• If you do have it in reverse simply swap the motor spade connectors over on the control board.

Listen to the wheels turning to make sure they are not rubbing on anything. Keep fingers away from moving parts and switch off you controller before working the gears.

Before taking your engine on to the track see the

"running your engine section".