The JCB 1D dumper was introduced in the late 1960s to compliment the diggers but it did not sell well against the established makes such as Thwaites, Benford and Barford, etc. and was soon dropped from the range. The JCB 1D had a single cylinder petter engine like most similar machines of the time with a 3 speed gear box and 2 wheeldrive. It had a ?CWT capacity manual tip skip