Can anyone point me to a schematic of the bolt assembly? I would like to tear it down and do a good cleaning on it.
Thanks in advance!

What type of firearm?

How many rounds have you fired through your rifle?

Probably around 4,000 or so rounds through it

Blow it out with polymer-safe Gun Scrubber and a shot of high-pressure air. I prefer a squirt or two of DRY lube to anything wet.

Shouldnt have to tear it down all the way, i use the high pressure action cleaner, flush it with that, compress the bolt to rear position and flush the other side, srub the bolt face a tooth brush/ cleaning brush, wipe it clean then apply a thin coat of dry moly lube to all parts of it including the rails it slides on,
If you want to tear it all the way down that your choice i just dont see the need for it

Leave it together and use an ultrasonic cleaner.
Rinse it off, blow it dry with compressed air and then lube with some CLP or run it dry.
Be sure to lube the rails and the guides in the bolt that ride on the rails.

__________________
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I've got over 11,700 rounds through mine, and I've never needed to disassemble the bolt for cleaning. I think you have a solution looking for a problem.
Follow the basic cleaning steps outlined by others here and you'll be fine.

Check at about 5:43 into this video... I have way less rounds fired through mine, but I'm going to take it apart just because I never have, and might as well CLP it while it's apart...

Smith & Wesson M&P 15-22 Instructional Video Series: Cleaning and Lubricating - YouTube

Surprising to me, the manual doesn't even recommend taking the bolt assembly apart (i.e. remove the spring and slide the bolt off the slides). First time I cleaned it, that's as far as I went, until I saw a video that showed removing the bolt from the slides, which I do now. It's so easy. But I don't feel the need to go further than that.

Thank you for the info

lotta folks clean their guns to death. taking apart constantly and putting back together wears pins, surface areas, barrel (Read about the supposed break in of a barrel, just premature wear so you can buy another!) brake cleaner, air, oil, air, bore snake a couple times and put it away.

Well it's my gun, I'll clean it as I see fit. Never had issues in 30 years of gun ownership so I must be doing something right.

Brake cleaner on a mostly polymer weapon. Brilliant.

I just wipe it down with a rag, relubricate with grease, bore snake 3x and done.

try reading what is in Gunscrubber at 5-6 bux a can....non chlorinated brake cleaner.

will not affect any polymer and have used it as long as i can remember even during 21 years in the Army cleaning the A1 through the M4. Always had a case of it in the Track to clean guns.
it will take off paint and clear coat, and may damage soft plastic or rubber, but not polymer.

do a little search on using it for cleaning guns. might help before the sarcastic face. or keep using your newest high tech cleaner, i could care less, i know what works...brake cleaner, mobile 1, and brown axle grease are the same components of most of the high tech stuff barring frog lube and some of the other 'heat and beat' stuff.

with your "US Army tag" and having a Fort Sill location, i would think that a 'career' soldier would know this. Happen to have tried the hottest water the cleaning area had to clean your M16? Works a lot better than Army CLP and constant scrubbing of the barrel with a bore brush. Check with the Fort Sill armorer in the basic area, if they still have BT there and see how many barrels they change out in a year due to over kill.

Speaking of hi tech cleaners...read the ingredients of Ballistol, a product that has been touted as the "Tears of God" for cleaning guns........2 of the main ingredients: Mineral oil and alcohol. straight alcohol and acetone are no no's for polymer. Mineral oil actually conditions polymer and keeps it black, so does lemon pledge should bottle it up and sell it as the next wonder cleaner.

but what do i know..

I've never bothered to tear down the bolt on my 15-22 (yeah that's my video posted above). I take the bolt off the rails, and clean the rails and the outside of the bolt and I usually stand it on end and put a few drops of CLP down the firing pin hole and let it sit for a few minutes. Wipe it all down, put a drop of CLP on the rails and put it all back together.