RE: JJ1400 14lb Turbine Stripdown/Rebuild
Next I fitted the combustion chamber over the tunnel and fed the fuel/gas pipes through the diffuser. The festo fittings shown were only temp screwed on to help pull them pipe through.
The front cover is a one piece unit on the JetJoe, some other turbines this is in two parts and requires shimming the intake around the compressor wheel. This is not needed which I suppose shows how good the machining is, as it would be CNC I suppose is not difficult to get right.
There is a Top hat type spacer that is fitted between the bearing and the compressor wheel, the rim or large diam of the spacer, fits against the back of the compressor. Shaft is shown just to show positions of the parts in picture, and not installed at this stage..
Spacer and Compressor wheel are just placed between the diffuser and the front cover and the front cover is screwed onto the diffuser with the cap head screws. Dont fully tighten them for now as you will probably have to remove two again when you refit the rpm sensor pcb. Pull through the fuel&gas pipes, and you can fit the festo fittings temp for now.