The were a number of smaller tractors used for per way work, there was recent published photo of a Massey Ferguson 35 on flanged wheels and a small 'train' of per way trolleys on the Harcourt St line before lifting. Think Cork had some Fordson Majors, read somewhere that they used travel up the disused Summerhill stub every so often to re-establish right of way years after it had closed, they probably to be found some shunting work in Tivoli too.