thanks its on the right stickI would think one of the joysticks will have two push buttons on it, one for close ,one for open ?
Maybe right joystick ?
I downloaded the operators manual and NO mention of 'thumb'.....probably an option...
course after seeing one the other day, got wondering HOW the hydraulics work to keep grip on rock ,while you curl the bucket......
Same on my backhoe BT 1100My BH92 has a pedal on the right.