Bobcat T300 aux hydo constant flow lock

I have a t300 that will not lock aux hydo flow on. The flow direction switch works fine but the lock switch wont work. The 3 magnet coils all seem to work ok. I am thinking a stuck stem on one of them. I would like to know wich one is the lock on stem. The valve body makes a click noise when the switch is triggered and the atachment will slowly lower but will not work . Thanks

Bobcat T300 aux hydo constant flow lock