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3 inch scale Marshall steam tractor - stock code 7537

Pictures opposite and words below taken last year. The engine is in similar condition now, it's had new water gauges and safety valves, lamps missing (but promised from the previous owner).

A 3 inch scale Marshall S type tractor, a well-detailed and nicely finished model with commercially built copper boiler - we've had it in steam this afternoon, belted up to the Garrett threshing machine currently in stock.

Silver soldered copper boiler by GB Services, built 2007, 100psi working pressure. Feed by mechanical pump with bypass and injector. Cast iron cylinder with piston valve actuated by Marshall valve gear (which always to my eyes looks at least one rod short of a set, but this one goes well enough), mechanical lubricator. Balanced crank, four shaft, two speed transmission with differential. Winch behind nearside wheel with fairlead mounted on tender.

Paintwork and lining are in good condition, it's got much of the patina of a full-size engine about it. There's some video of it running in the yard this afternoon here.

scale 3 inch
length/inches 53
width/inches 21
height/inches 34
cylinder material cast iron
valve type piston
valve gear Marshall
reverser type pole
injector(s) 1
boiler number GB246
year built 2007
boiler maker GB Boiler Services
CE mark yes
working pressure/psi 100
boiler type locomotive
boiler material copper
boiler construction silver soldered
hydraulic test valid to 11/Jul/2021
steam test valid to 25/Nov/2018
fusible plug no
safety valve(s) 2
safety valve type spring
mechanical pump 1
whistle yes
road speed(s) 2
differential yes