We just bought a used Hobart HGCV 40-1 combi convection oven that is natural gas. We would like to convert over to propane but have not been able to locate a conversion kit. Do I have to order each replacement part separately?
Being a combi oven, they are very touchy. You will need to contact your local Hobart service center with not only a model number, but the units ML number. and some of the parts are specific to you elevation.
The good news is that the model you provided is not a combi oven, but a straight convention oven. So conversion should not be to bad. But you still need a tech to calibrate it. Being a 25 year old design, one wants to inspect all the internal burner parts and motors.
It appears that you only need 2 parts for that conversion. A gas valve and a orifice.