Re-assembly Notes -- this is a MUST READ

[DDGator]

  
Eric informs me that they just received an R9 for repair due to the reverse installation of the outer recoil spring.

This has been posted here before, but is worth noting again.

The outer recoil spring with the finished end must rest on the collar of the recoil sleeve, and the unfinished end must be towards the front of the gun inside the end cap.

Here is a series of pics showing the PROPER arrangement:










If this spring is reversed, a failure can occur. The unfinished end of the outer recoil spring will over-ride the collar and jamb the slide.  This is an example of the damge you can do with the spring installed backwards -- note the damage to the collar.

[rtw]

These are great photos-Does the owner's manual contain this level of clarity?

You may wish to copy the above to the maintenance area for future ease of reference.

[justin2992]

Does the takedown pin assemble in any particular orientation, left vs. right? Or is it completely symmetric?

[dr16]

Thanks for the photo update

[R9SCarry]

[size=13]Does the takedown pin assemble in any particular orientation, left vs. right? Or is it completely symmetric?[/size]

Justin .... The pin can only exit and be replaced from left side of slide ... the hole on right is smaller and that is where the punch is used when removing.

Useful reminder pics Duane - important folks know this.  I will keep those pics and I think as and when I have time .. try and make up a small info set of pages on one of my servers ... over time, try and consolidate our knowledge base.

[justin2992]

I meant which end of the pin goes in first?

[JimmyD]

 
The outer recoil spring with the finished end must rest on the collar of the recoil sleeve, and the unfinished end must be towards the front of the gun inside the end cap

I notice that the Kahr PM9 has a similar setup. Question: Is there a reason that one end of the spring must be "unfinished?" Couldn't they design it so that both ends are closed, so that you could install it either way and prevent failures such as this?

[DDGator]

I don't know the specific answer to this... however, I do know that Rohrbaugh spent a long time working in cooperation with Wolff Springs (one of the best) to come up with the shortest possible slide/spring combination to function reliably.  I can only guess that the unfinished end is related to that goal.  It's hard to imagine that Rohrbaugh would partner with Wolff and work closely on getting this set-up right, only to over-look a finishing detail.

[RJ HEDLEY]

Question: Is there a reason that one end of the spring must be "unfinished
--------------------------------------------------

I'm not an Engineer, but I did stay at a Holiday End Express last night.  

Here's my understanding.

       ~~~Overall length is critical.~~~
The open end is *live* all the way to the end,  the closed end is dead for a full coil. The closed end adds length, but is  necessary for the purpose of not jumping over the shoulder.

Clear ?

[WoodstockDoug]

Even after reading this, I mistakenly reassembled the spring backwards today after cleaning.  The first time I racked the slide, the spring jumped the collar and wouldn't allow the slide to go back far enough to chamber a round.  It didn't do any noticeable damage, but it was a serious pain to get the spring back over that collar.  So...  don't do it.

<--- always gotta learn the hard way.

[RJ HEDLEY]

So far as I can see, the soul purpose of the CUP, is to contain the open end of the spring...

[tracker]

RJ,
You're messin with us.

[PsychoSword]

Do they include these instructions with the gun? Might save them and alot of buyers many headaches.

[bigyimmy]

Stuff like this is why I recommend revolvers to inexperienced shooters.