Smoothing up action on a pump?

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Smoothing up action on a pump?

Postby 10gaOkie » Sun Sep 01, 2013 2:35 pm

What is the best and quickest way of smoothing a 870 pump gun's action? I have had thoughts about coating the rails and guide channels with Dupont polishing compound and working the action several hundred times. Then wash and relube.

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Re: Smoothing up action on a pump?

Postby Jon Bergren » Sun Sep 01, 2013 4:28 pm

I have done similiar operations with my new guns including autos, Wingmaster and seven 870 Expresses. I disassembel the gun and if it is new remove all the grease with cheap Carb cleaner. I then coat all moving parts with valve seating compound, reassemble and work the action 300 times. Turn up the water heater before starting and then disassemble the gun washing everything with the extra hot water. The parts will dry quickly. I am a fan of Hoppes gun oil so I oil the parts wiping or blowing offf the excess. This really smooths them out. With the 870's they almost completely cycle from the recoil. Ned S
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Re: Smoothing up action on a pump?

Postby BurninPowder » Sun Sep 01, 2013 7:02 pm

If you're not having any issues... clean, shoot, repeat... Great excuse to practice :thumbsup:
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Re: Smoothing up action on a pump?

Postby 10gaOkie » Sun Sep 01, 2013 8:15 pm

I probably wont be shooting it all that much and want a quicker fix. Its something I havent tried before. Should be interesting.
Permatex valve compound is most likely the way I will go.

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Re: Smoothing up action on a pump?

Postby BT Justice » Mon Sep 02, 2013 3:43 am

The biggest problem with 870's is the design of the action itself, especially when your trying to cycle them fast they have tendencies to bind quite a bit. Best thing I've found with mine is to use an anti seize lube on the rails and bolt slides, it seems to help out quite a bit. I wouldn't recommend grinding or polishing anything, that will only make things more loose in the action and could make it worse than it was.
I don't use my 870 much in the field since I bought a Winchester 1300 Black Shadow several years ago, the difference in how they function is like night and day...the Winchesters action is much smoother and more reliable in my opinion.
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Re: Smoothing up action on a pump?

Postby z51 » Mon Sep 02, 2013 8:01 am

I agree with BT, I don't recommend using polishing compound on all the moving parts. You will loosen up places that don't need it. Disassemble the gun and inspect carefully for rough spots or burrs. If you find them carefully stone the area smooth. If you don't find rough spots look for rub marks. A little polishing compound on just those spots and work it a couple hundred times. Disassemble and carefully wipe off ALL of the compound with a solvent. There is no need to give your gun a bath.
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Re: Smoothing up action on a pump?

Postby 10gaOkie » Mon Sep 02, 2013 9:47 am

The gun is camo dipped so I wont be using solvent on it. I am only doing the rails in the first place. Not all moving parts. I dont know where that came from.

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Re: Smoothing up action on a pump?

Postby 2500hdon37s » Mon Sep 02, 2013 11:44 am

Read this, a simple polish of the internal parts will really help.

viewtopic.php?f=100&t=229769
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