134 divided by 6 axles = 22.3 tonnes, less than the 23t limit for the line. (they run with less fuel on lines other than Hunter Valley)
I think there are several pinch points where the loading gauge could be tight.
According to the John Holland TOC Waiver 13 - 061 one of the conditions for operation of the CF and other AC type locos is the Note 'R9'.
There is a specific Note 2 on this waiver excluding these locos from the Orange to Dubbo corridor as it is deemed narrow square outline and locos and rolling stock with a R9 note are excluded.
Locos and rolling stock with the R9 note infringe the rolling stock outline in the bottom corner near rail level and once corridors have been surveyed to be clear from any infringements then these locos and rolling stock can then travel over it.
Corridors with the R9 infringement can be found in the JHR TOC Manual in the General Instruction pages, Section 1, page 2.