Am Montag, 9. Oktober 2017 15:15:55 UTC+2 schrieb Larry Jaques:

Fascinating that the part has 3 weld tails and no (visible) welding on
the bottom left side. Those tabs are under extremely high pressure as
pivot points. Historical failure surely led to this practice. I'll
bet Caterpillar, Kubota, Case, Hitachi, Komatsu, Volvo, etc. engineers
have some stories to tell about them. If you write to them and they
respond, please share it with us. I always got Gibbs-slapped as a kid
because I constantly asked for more details about everything.

Looks like Volvo does exactly the same thing:
https://www.flickr.com/photos/138493...posted-public/