Benji Trail NP help, please

[gander]

Hi, New guy here.  I'm a retiree with a new Benjamin Trail NP.  I was replacing the stock trigger with a Charlie da tuna model(works great btw) and snapped a pic of the trigger housing.  I'm planning to inspect and probably replace the piston seal and need a little info.  I've read all the threads that apply and still am a little fuzzy as to the sequence of disassembly. Let's say I've removed the stock, disconnected the cocking linkage from the trigger and removed the rear retaining screw for the trigger housing.  Also, I've got my spring compressor ready. 

Questions:
1.  Do I remove the trigger housing or end cap next?
2.  If the trigger housing is first, how?
3.  If the end cap is next, is the cap threaded?  If so, what is best tool to use without marring the finish?
4.  I assume the the trigger housing and end cap must be removed first, the spring compressor set up and pressure applied to take pressure off the retainer pin, then the pin tapped out and spring and piston removed by backing off the spring compressor.  Is this correct?
5.  I plan to remove sharp edges before reassembly.  I found a link to the seal required but specifically, what lubes do I buy?
6.  Did I miss anything?

Sorry for the pic quality and the length of the thread.  Thanks in advance for the advice.   

 

[Rocker1]

i don't think the trigger assembley will come out with out taking off the end cap, at least my xl wouldn't and you need to use a spring compressor before you knock that pin out, and you have to use the spring compressor in order to take the pin out of the cap it is preloaded and it is strong. have a look here gene did a complete write up of the np    www.gatewaytoairguns.org/GTA/index.php/topic,649.0.html thanks david

[Perry]

You need to remove the old trigger adjustment screw (philips one in pic). 1.Pop off the end cap with a small screw driver it's not threaded. 2. then remove the trigger housing,  4. Your assumption in is correct. 5. Buy the moly grease from J Maccari with the Tesla seal for the metal to metal lubrication and silicone grease at an automotive shop or hardware store for the compression tube and seal. 6. Pay close attention to the 3 holes at the end of the tube and de-burr them very well and gently insert the piston to not nick it during re-installation.

[gander]

Thanks for the replies.  Clears up a lot of my questions.   I'll build my compressor when the weather cools a bit.  Is this the correct seal?
http://www.airrifleheadquarters.com/catalog/item/251485/2325552.htm

And is this the moly grease?
http://www.airrifleheadquarters.com/catalog/item/251484/42989.htm

Thanks again for any and all input.  

[Perry]

Yes and yes. Good luck.