The story of the W.A.G.R. ballast ploughs is a complicated one. The first six-wheeled ballast plough was VP1 built for the W.A.G.R. in 1892. Two more were acquired in 1895/6 with possibly a fourth built for the Public Works Department. Photographic evidence shows that one of these ploughs was numbered 1440 at some point. This number was blank in 1900. Much of the railway construction equipment was transferred to the P.W.D. in the early years of the century leaving the W.A.G.R. with two ballast ploughs numbered 5178 and 5179.

These two numbers were immediately after the end of the 1900 renumbering list and so must have been allocated in late 1900 or early 1901. In 1931 the P.W.D. rolling stock was taken over by the W.A.G.R. and the three ballast ploughs included in the transfer were given the numbers 4531-4533. Number 4532 was a four wheeler but was given an LX classification unlike the other four wheel ploughs which formed part of class H. At least one of the six wheelers (5179) lost its centre pair of wheels late in life. After all this confusion the LX class ploughs were written off as follows:

In 1931 two of the three absorbed P.W.D. ballast ploughs were placed in class H. These were 4209 and 4518. Number 4518 had trapdoors in the floor and in 1934 had its ploughs removed. Number 4209 was written off in 1953. At some time in the 1950s a further eight H class wagons were also fitted with ballast ploughs. These were 17,1212, 2499, 3142 3153, 3980, 4295 and 4578. It is believed that 4295 (also ex PWD) may have had a GC type frame. These wagons were written off as follows: