This has happened 3 times on 2 different pumps with 2 different cans. Both psc pumps with their reservoir, -12 feed, -8 return, -6 to the ram. The o-ring just spits out from between the pump and the can and pukes fluid out. Talked with Lance and he thought the case to the pump was cracked(high pressure in the can side)or the hose routing is pulling the can away from the pump(the pump and reservoir are both attached to the engine). After this happens I loosen the bolts and the fitting in the back, the o-ring slips back into place, tighten it all back up, top off the fluid, and everything works fine again. I should add that this is sporadic, could happen next trail ride or next season One time it happened I was getting on it, the other 2 times there was no significant event. Any help is appreciated.