How do I cut a AM body for pump arm?

[dyeforever]

i used a dremel. the part you highlighted i just cut it to be like a ramp. most of the pump rod sits in the rail. use the measurement that doc gave you and make a ramp for the pump rod.

[luke]

I can't see any reason that this machining would be necessary.



I don't see what purpose it serves, I wonder if it is just part of the original manufacturing process. Does anyone know if it is necessary for the pump to operate properly?

[mpsd]

But what about the ramp? Is it necessary too?

[luke]

Perhaps it just a guide channel, but I'm not sure...

[PumpMag]

But what about the ramp? Is it necessary too?

Yes, the ramp is required. It guides the pump rod to push upward against the edge of the bolt.

The pump rod cocks the bolt, so that the bolt engages the sear (prevented by the wave spring).

[PumpMag]

I can't see any reason that this machining would be necessary.

I don't see what purpose it serves, I wonder if it is just part of the original manufacturing process. Does anyone know if it is necessary for the pump to operate properly?

That's part of the original retaining ring. That's the welded lip section of what the bolt spring rests against inside the body.

Probably left intact so that there is no compromise of structural strength.

[mpsd]

Yes, the ramp is required. It guides the pump rod to push upward against the edge of the bolt.

The pump rod cocks the bolt, so that the bolt engages the sear (prevented by the wave spring).

But this should be accomplished by the ramp milled into the rail, shouldn't it? correct me if I'm wrong.

[PumpMag]

But this should be accomplished by the ramp milled into the rail, shouldn't it? correct me if I'm wrong.

You need the ramp in both the rail and the body. The function for both ramps are to make sure the pump rod slants upwards and out of the way of the bolt spring to catch the edge of the bolt.

It's too bad you aren't in California. It's easier to show and see in person.

[PumpMag]

Up close and side by side, the ULE bodies don't have such large a lip, probably also saves further weight.

I have posted a thread in the Tech section with a picture comparison:

http://www.automags.org/forums/showthread.php?p=2455499#post2455499

Check there to help with your questions.

PumpMag

[luke]

That's part of the orginal retaining ring. That's the welded lip section of what the bolt spring rests against inside the body.

Probably left intact so that there is no compromise of structural strength.

So the area I circled is not necessary for the conversion, right?

[PumpMag]

Removal will not affect the pump kit from operating. But if the original factory cuts have it on the AM/MM body then IMO I say leave it there. Again, better safe than sorry. It's probably left there for structural integrity or because of the manufacturing process. Perhaps the retaining ring is welded after the factory milling is done.

[mpsd]

Removal will not affect the pump kit from operating. But if the original factory cuts have it on the AM/MM body then IMO I say leave it there. Again, better safe than sorry. It's probably left there for structural integrity or because of the manufacturing process. Perhaps the retaining ring is welded after the factory milling is done.

My question was exactly the oposite. I was questioning if I really need to mill the body and make this whole section (ramp and the other part that Luke indicated) thinner or if I could just open the largest area where the pump rod gets into the body.

[luke]

Removal will not affect the pump kit from operating. But if the original factory cuts have it on the AM/MM body then IMO I say leave it there. Again, better safe than sorry. It's probably left there for structural integrity or because of the manufacturing process. Perhaps the retaining ring is welded after the factory milling is done.

I guess you're not following me.

If you start with a stock body like this blue one. That has not been machined yet...





Is it necessary to take all the extra time to machine the area I circled here?>>




The guy took the extra time and effort with a dremel to cut that section. In my mind I don't see why it would be necessary to setup to machine that area. I would think the small channel would be all that is necessary.

I'm not talking about completly removing that section..

I don't have the parts to figure it out on my own.

[doc_Zox]

his dremel prolly got a tad sideways and went exploring uncharted territory

[DevilMan]

Not the threadjack here... but how many of you guys here have a machine shop or end mill that you'd mill a body and rail for me without it costing my soul???

I've hacked it up on one side the way I want it it... Good ole grinder!!!! But I'd really like it to look alot nicer....

Anyone have the time to try out something new... It's not the same milling as shown above....

Please PM me...

DM