Vintage Horticultural and Garden Machinery Club

I worked in a Estates office that purchased three of these Sisis Hydromain units, two 14hp and one of the larger 17hp units, they were introduced in the mid 1980’s as a upgrade to the Sisis Auto-trac which had a 10hp engine.
They could use all the auto-trac attachments but also had there own collection of attachments.
They had hydrostatic transmissions and hydraulic lift
I think they were subsequently replaced by MF mini tractors that were available at advantageous lease rates to educational establishments