Nice little Engineroom on No3 about the size of a Coaster, she was the newest of the Self Propelled Hoppers when I was there, Crossley 2 stroke Main Engine, MWD Gearbox, pair of Gardners as the Auxiliaries one on a Radiator in case she sat on the Putty. Unlike the other Hoppers the Hopper Doors were not operated by chain but by Hydraulic Pistons which are fine but a small leak under pressure looks like it has dumped half of the Saudi output over the Strongback. Did a week on her. Very similar to the Wilton ( of the time) in her Engineroom layout except for M.E. size, Regular de-cokes were the key with 2Strokes.
Very surprised that she only lasted till 1972 bearing in mind the age of some of the TCC Fleet, although I see she was sold to Pounds so she may have had an "afterlife" as a lot of vessels did barring for the Submarines