When Looking at end of tube assembly the coil fits on is there a round pin in the center of it? If yes try pushing on one of them to see of grapple operates.
If there are quick disconnects in the lines to the grapple one of them may be partially disconnected not allowing grapple to operate.
/ Summit TX25 3rd function diverter valve not operating at all.
There is a pin. According to summit technicians it does not manually operate the diverter and it doesn’t. The two quick connects easily connect and are new. Summits fix is disassemble, clean and reassemble. I have done 6 times.