The problem may be in the gun and not the pump. I've no idea which gun you have, but one simple way to tell is to completely unhook the gun from the hose. Take a bucket of lukewarm sudsy water (assuming you are using water based paints) and set the sump and take up hose down into it,
Sometimes the knob for the primer/spray isn't placed properly on the rod that controls the primer and spray.
Turn the pump on, with the pressure turned down to its lowest setting and set to prime. You may have to increase the turns until it starts to flow. Then turn it to spray. All this without the gun attached. If the flow is noticeably different as you adjust the knob, the problem lies in the gun, most likely in o-rings, plaugged filters with burst holes, or the packing on the needle valve.
If none of this makes any difference, either you have a bad spray/prime unit or it is installed improperly, perhaps missing o-rings and/or the ball at the bottom of the o-ring orifice.
Sirwriter
I wouldn't think your transducer would cause it to run at full flow. So you've taken the gun off and it STILL runs at high flow no matter what else you do?
Titans are really good pumps. I believe at this point I would take it to a Sherwyn Williams paint store (unless you have a Titan dealer near you that works on site) and see what they think. There are so many little O rings and such that can cause this type problem and it is easy to over look one, or even worse, not see one because it was left out during reassembly. But if you just rebuilt it, did you replace the switch? That would be the only other thing that could cause it, although with all the tests you've made with the gun off it seems highly unlikely.
It IS possible to get a bum part even though it is brand new.
Sirwriter
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i've gone through those checks and am thinking maybe the transducer? can this cause this.
thanks, i just wanted to avoid the huge service charges but i guess thats what i'll do.
thanks for your help
jim
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