If all else fails refer to the manual: Max external load = 900 Kg,
Max auw 2400 Kg ( helicopter + external load)
This boils down to a midget pilot + no fuel if your E.W. is 1400 Kg
The most practical load at sea level is +- 500 Kg.
If u need more info I have the F.M. in front of me and +- 4000 Hrs on the 105 - Great machine
Bendix