Pump Action Trouble - Maverick 88

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gyates93

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Hey guys.

I must start by saying I'm a rifle shooter, not a shotgunner..

A buddy of mine and I pulled apart his Mossberg Maverick 88 in 12 gauge yesterday, with the intentions of cleaning up all of the old gunk on the bolt and in the reciever.

After the shotgun was all cleaned up, I started to reassemble it. After placing the bolt in the gun, the pump (and action bar) into its correct position, and installing the bolt slide, I started having some trouble.

When I install the shell stop and shell interrupter, this is where the problem lies.

If I install both parts, the trigger group will drop in easily, and it appears the gun is fully (and correctly) assembled. However, the action will not cycle fully, it will only open halfway.

If I remove the shell stop, (The hooked one that pivots on a little pin) the action will cycle smoothly. However, now, the shotgun will double feed.

Is there anything in particular that I may be missing when I assemble the shotgun? It seems that the bolt slide is somehow getting caught on the shell stop when it is assembled..

If anybody could offer any insight into the problem, that would be great.
The shotgun cycled perfectly before it was disassembled, so I believe it is just a reassembly problem.

Thanks a lot.
 
The shotgun cycles fine without the shell interrupter,(Stop?)

But it won't cycle with it?

Anybody have a possible reason why?
How should it fit?
Pictures would be a godsend, as right now the total useful capacity is 2 - one in the chamber, one in the magazine.
 
Well, we've figured it out.

One of the pins holding the (Plastic, sadly.. ) trigger group together was not fully pressed into its hole, catching up against the shell interrupter when the trigger group was inserted.

Thanks a lot guys.
 
I just broke down one of my 500's to see if I could find out what might cause your problem. I'm on dial-up, so pics are a major PITA, sorry. Try cycling it with the trigger group out and see if you can find the poblem. As you open the action and the bolt slides back, it contacts the back of the interrupter and pushes it down,making the other end go up, and the hook should slip in behind the rim of the shell in the mag. About an inch ahead of the pivot point, there is a pointed bit (hard to describe) that goes up into a small recess as the bolt goes back and it almost contacts the action bar. When you close the action the bolt hits the pointy bit, pushing the interupter back down, allowing the next shell to move back. If you have the bolt sitting so it isn't contacting either the back of the interupter or the pointy bit, it should move freely on its pivot. It sounds like something is stopping it from pivoting.
This is assuming that is the same as the 500. I've never had my hands on an 88 so I'm not sure how similar they are. I hope this is of some help to you.

Jim

EDIT: I see I was too slow typing that, good to here you got it fixed.
 
I know there are some differences. The 500 has a tang safety and the 88 has a crossbolt safety on the trigger guard. The older 88's only had one action bar and the action bar or bars are pinned to the plastic fore-end (the 500 has a steel sleeve inside the fore-end and the action bars attach to that). Barrels and buttstocks do interchange between them, but I'm not sure if any of the internal parts do.

Jim

EDIT: Out of curiosity I downloaded the owners manual for the 88/91. From the diagrams in it, it appears that all the internals are at least very similar to the 500 if not identical.
 
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