RT Classic Issue (didn't think this through all the way)

[Spider-TW]

would be nice if we put all this info in a single thread and sticky it.

thinking some pics of the old and new banjos ( with dimensions) and a pics of old and new rails.

I was looking at the pics in the online store of the banjo bolt. It may just be the old pic as it looks the same. I'm guessing that the taper from the top o-ring groove to the middle groove is for clearance of the banjo against the rail. That spot needs to be lower and/or a larger diameter. The banjo appears to move some as you shoot, even with 90D o-rings, as you always find this failure on the forward side of the banjo. You think you got it fixed, then the o-ring pops while you are playing.

While I modified my rail, a modified banjo would be an easier fix if you could get the dimensions and machining right.

If you remember the story with the original (level 5? no allen socket) field strip screws, they would fail over time, shearing off or bending beyond usability. I had one that bent. TK explained that around here, something about the threading process. I would check that before making a batch of banjo screws (that's if AGD doesn't have an improved one already).

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Considering how many of us know about the power feed plug upgrade and such, I keep wondering about the differences in the changes to the RT classic as well as it's total production numbers.

[blackdeath1k]

There have been pictures posted of the new and old classic rt rails and banjo bolts posted recently. For the life of me I don't remember what thread they are in.

[captian pinky]

i know the rails were posted wasnt sure about the banjos.

Calling Bunny to right an article........hoping this works like when we call tk and he just appears.

found the other thread

http://www.automags.org/forums/showthread.php?273895-Classic-RT-Rail&p=2905572#post2905572

[Mondoatx]

Hey guys,

Yes... they were AGD O rings out of a fresh RT Classic parts kit... so I don't think that was the issue.

Waiting on some more Banjo O rings...

I will try the process for assembly Nobody mentioned...

I also discovered the sear had a chip missing out of the edge that catches the bolt... so it wasn't exactly a sharp edge where it catches the bolt (ordered a replacement)...

In addition the Banjo bolt middle o ring was shredded...

And I had a 1 way valve in the male end of the QD...

When I aired it up it was sometimes burst firing and sometimes getting bolt stick... Not sure if this was caused by any of the above issues because that oring on the field strip was chopped and it kept me from eliminating possible suspects... I had replaced all the seals prior to this.

Anyone care to weigh in on which issue is causing the bolt to behave this way? Or is it something else entirely?

As always... thanks for the support of the community!

M

[luke]

I also discovered the sear had a chip missing out of the edge that catches the bolt... so it wasn't exactly a sharp edge where it catches the bolt (ordered a replacement)...

When I aired it up it was sometimes burst firing and sometimes getting bolt stick...

The sear is likely the cause, you also need to check the bolt edge that catches the sear for wear. (Inspect it with a magnifying glass)

[Spider-TW]

Mondo, would you take a pic similar to the ones in the thread below, for comparison?

i know the rails were posted wasnt sure about the banjos.

Calling Bunny to right an article........hoping this works like when we call tk and he just appears.

found the other thread

http://www.automags.org/forums/showt...72#post2905572

[blackdeath1k]

Sounds like your rt is one of the Original classic RTs that had all of the problem parts. First gen rail, first gen banjo, and first gen carbon tipped sear.

[Mondoatx]

Lucky me...

At least the banjo and sear are easy (read cheap) fixes... Rail is a bit more expensive...

Sounds like your rt is one of the Original classic RTs that had all of the problem parts. First gen rail, first gen banjo, and first gen carbon tipped sear.

[Mondoatx]

Spider,

Yes would be happy to. Will get to it tonight.

Mondo, would you take a pic similar to the ones in the thread below, for comparison?

[Mondoatx]

Luke,

When I inspect the bolt edge... what am I looking for exactly?

I am assuming if I need a magnifying glass I should be looking for something possibly tough to notice? A minute detail of some sort?

The sear is likely the cause, you also need to check the bolt edge that catches the sear for wear. (Inspect it with a magnifying glass)

[captian pinky]

It should be a sharp triangular corner. If it has a chunk missing replace it.


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[Spider-TW]

first gen carbon tipped sear.

Carbide, but that did make me wonder for a second if there wasn't some new carbon material that would work.

It's very interesting how the carbide fails of brittle fracture while we (or many of us) have trouble wearing out a regular sear.

[Tunaman]

Carbide, but that did make me wonder for a second if there wasn't some new carbon material that would work.

It's very interesting how the carbide fails of brittle fracture while we (or many of us) have trouble wearing out a regular sear.

Whatever AGD did to the hardness of the new sear and bolt they got it right...because bolt and sear wear is almost non existant anymore.

[luke]

Luke,

When I inspect the bolt edge... what am I looking for exactly?

I am assuming if I need a magnifying glass I should be looking for something possibly tough to notice? A minute detail of some sort?

I use a magnifying glass to inspect all my AGD valve parts especially orings. As far as the edge of your bolt goes, it will be an inconsistency of some sort, if there's something wrong you will know when you see it.

[Mondoatx]

Did the best I could... couldn't quite match the angles or lighting...

Let me know if you would like me to post them on the referenced thread...

Also... I don't see a huge difference betw what is posted on that other thread and what I have here... if someone can/does notice the difference spell it out for me.

Thanks all!

Mondo, would you take a pic similar to the ones in the thread below, for comparison?