help with a p90dc

[goldeyeslayer]

I found a p90dc at a pawn shop. The pistol is really clean, but the trigger won't reset. If the slide is cycled, the hammer will fall, but if I try to pull it again, it won't engage the hammer. Any ideas what I'd be looking at to fix it? I've never seen this (or any) problem with a P series. Asking price isn't too bad, but I don't want a huge repair bill also. Thanks

 

[96/44]

Are you saying if you cycle the slide, the hammer stays back then falls when you pull the trigger? If that is the case, it is normal for the P series. The slide has to cycle before the trigger will reset.

 

[goldeyeslayer]

right, but the trigger will only pull once. every other p series I've had and all the others in the shop will continue to dry fire w/o cycling the slide

 

[goldeyeslayer]

well, I did it anyway. we'll see how much it takes to make it run. $275

 

[goldeyeslayer]

HA! removed grips, problem solved.

 

[hittman]

Good buy! I've got a twin to it.

 

[chefrob1]

HA! removed grips, problem solved.

i was going to sugest you remove the grips.........i had the same problem when i put those hogue grips on my p90.

 

[roylt]

So what is the fix? Problem?

 

[goldeyeslayer]

well, I put a set of stock grips on. the problem continues. :x The wire spring under the left grip is being bound up by the grips. I haven't had the chance yet to see exactly why

 

[goldeyeslayer]

Ok, fixed now. There is a raised "tab" at the top rear of the left grip panel that binds up the trigger bar and spring. My guess is that the grips were made to fit all the P series and the 90 is juuuuust a bit different. A bit of trimming and its good to go.

 

[chefrob1]

...and that's what i did to mine.

 

[roylt]

Post pics if possible please. I have a couple used 90s that I have never messed with. Dry fire fine but still like to learn more.

 

[goldeyeslayer]

about where the you see the arrow (from vid) is where it was binding.

material removed at arrows

 

[roylt]

I'm no smith but the grip has that material there to hold the ejector pin in place. Looks to me like the "spring" is bent too far open, if that makes since. I'll have to take mine apart. I have a PP90DC which was a state troopers pistol so I know it worked, I just have not tried it.

 

[goldeyeslayer]

the grip wouldn't let the trigger bar travel fully rearward or "down" far enough in its arc

 

[roylt]

I would double check that the ejector pin can not move out of position. Simply remove the right side grip and try to push the pin out of the frame to the left to see if the left grip panel is holding it enough.

Worst case if the pin slips to the side I think it may just cause the ejector to make the mag hang. also during takedown it could cause a problem.

 

[goldeyeslayer]

I would double check that the ejector pin can not move out of position. Simply remove the right side grip and try to push the pin out of the frame to the left to see if the left grip panel is holding it enough.

Worst case if the pin slips to the side I think it may just cause the ejector to make the mag hang. also during takedown it could cause a problem.

I'll check that. Would you mind posting a pic of the right side w/o a grip? Maybe the trigger bar spring is tweaked. Thanks

 

[roylt]

By the time I get my kids to bed I usually fall asleep in the chair trying to watch the news but I'll try to stay up one of these nights.

Someone else may beat me to it too.

 

[roylt]

So I took mine apart and it looks to me like your spring is not far enough in the frame area. The grip should never interfere with the spring movement. I also noticed with the grips off and dry firing a few times the pin that holds the ejector in place did start to move. I would be concerned with it moving with a modified grip installed.

Pics to follow.

 

[roylt]

The spring on my KP looks to be deeper in the frame on the left side. Plenty of clearance on the right by the ejector pin.

 

[roylt]

You can see where the spring has rubbed slightly.

 

[roylt]

Here is my police issued PP90DC which shows the same as my KP.

 

[roylt]

This is dirty but you can see on the factory fit Hogue from the PP90DC that it has the same clearance as the plastic grip panel.

I also checked a newer Hogue grip that was REV. B and it had the same clearance.

I feel if you need to modify the grip to make your pistol work then something is wrong with your pistol. I would look closely at the trigger bar spring and see if it is installed correctly.

Hope this helps. Feel free to ask questions etc and I will try to help.

 

[chefrob1]

after taking mine apart again, roylt is right. i remembered when i was installing the grip, the spring slipped out of it's grove and i had put it back in incorectly and it did interfere with the new grip and that's when i figured the problem was with the grip......after all, it couldn't be with me......... :roll:

here is the spring out of the frame slot....

the problem was this part of the spring was in the frame grove......

this is the part of the spring that should be in the grove......

this is what it should look like...........

as for the pin being able to work it's way out, i put the side of the grip that i modified on and pushed the pin until it touched the grip.

the pin did not come all the way out but enough of it did so the ejector wiggled a little bit and that's not good under the pressure of cycling.

the good news is it is and easy fix to get the gun right and a new grip is only $20........thx roylt for pointing out that something was wrong and that our mods to the grips could infact cause a malfunction.

 

[roylt]

Any of my mods I try to prove out 100% before I post and the #1 thing is to be safe. With that said, I'm not a gunsmith so this place is great to get a helping hand.

I really enjoy tinkering on the P-series. It was my pleasure to try and help.

P-Guns Rule! (no I'm not a teenager)

 

[PAVTXER]

Make sure the correct grips are installed as well. I inadvertently swapped my Hogue grips from a KP93/94 to a KP89 and it would not cycle. Those grips are not all the same.... I think the P93/94 are the different ones from the others.