Have an 815sse. Comes in at 3.8 tonnes on the crane with AQAD40B (165). Other than that the link from Divemaster is the way to go, use google translate as it's mostly in Scandinavian, and click on 'modeller'
2,200 Kg original... which was with a petrol engine ... add a couple of hundred Kg extra for superstructure and six cylinder diesel ++ and you get somewhere between 2,600 to 2,900 Kg ...