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3 inch scale vertical boiler steam roller - stock code 7855

An ingeniously built 3 inch scale freelance steam roller, recently arrived in part-exchange against a similar scale agricultural engine.

Motivated by a single cylinder horizontal engine with slip eccentric reversing gear coupled to a coal-fired vertical boiler; drive is by chain to the rear roll.

Boiler has new hydraulic test, the commercial safety valves fitted open at working pressure and don’t accumulate, however neither do they close with anything approaching reliability – they will require replacement. We’ve had the thing in steam and rolled around the yard (which, truth be told, didn’t look a great deal flatter afterwards, although Connor seemed to be having fun).

Equipped with alarmingly responsive steering, a small sofa for the driver and overall dimensions to suit the most generously proportioned of owners (not to mention making an interesting change from the line of 3 inch Burrells at your local rally).


scale 3 inch
length/inches 61
width/inches 24
height/inches 40
cylinder material cast iron
valve type slide
valve gear slip eccentric
boiler number 801
year built 2000
boiler maker Mackins Fabrication
CE mark n/a, pre-2002
working pressure/psi 80
boiler type vertical
boiler material steel
boiler construction riveted
hydraulic test valid to 11-Feb-2020
fusible plug no
safety valve(s) 2
safety valve type spring
mechanical pump 1
hand pump 1