The VHQY wagons were a 1979 recoding of the JQF_ class. The class was relettered between 1979 and 1980. The number group at 1980 was 401 to 420.
From the early 1980's 'slope sheets' were tried and eventually the whole class fitted. There were problems with quarry material lodging on the end platforms giving extra weight ( hence overloading ) and when wet, allowing moisture retention to hasten rusting.
In 1982, three wagons were modified from JBF_ / VHBY. Wagons VHQY 421 - 423 were converted from JBF 32, VHBY 33 and 34 respectively.
In 1986 VHQY 424 and 425 were modified from VHBY 30 and 1 respectively.
Between 1987 and 1990 the class letters were altered to VHQF.
By 1990 the VHQF numbers were 401 - 425.
Between 1989 and 1994, twenty five wagons were added to the class. VHQF 201 - 210 were converted from VHCX / VHDX. VHQF 211 - 223 were converted from the VHRX rock hoppers. VHQF 224, 225 were converted from VHCX.
This made a total of fify wagons in quarry transport service.