Here is a descriptive LPR cleaning guide for the DM8/9/10/11/12/13. The shim stack order is the same
on all of the listed DM markers. I made this because it specifically caters towards all of the ‘newer’ DM (DM8-DM13) models with LPR’s and the Hyper 3 regs. This is being done on a DM11*
- Paper Towels
- 1/4 Allen Key
- 3/16 Allen Key
- 5/64 Allen Key
- Fine Needle Nose Pliers
- Lube of Choice
Identifying parts and their appropriate names/locations.
Remove grips and unplug the 2 molex connectors from the board.
Remove the LPR Cap with the 1/4 Allen Key.
Remove the brass LPR seat retainer with the 3/16 Allen Key.
Remove the 2 screws that hold the grip frame to the body of the gun. Carefully funnel the wires through the grip frame to completely separate the grip frame from the body of the gun.
**NO PICS** This should be pretty straight forward..
On the underside of the body, remove the set screw with the 5/64 Allen Key at the VERY REAR of the body so that you can pull the LPR Body out.
Carefully, grip the LPR Body with the Fine Needle Nose Pliers and pull it out. You DO NOT have to clamp down on this very hard at all. Pull it STRAIGHT OUT so that you do not damage the LPR Body. DO NOT stick the pliers in so far that they touch the threads. There's no need to, and you could damage the threads on the inside of the LPR Body.
Once you have the LPR Body out, you may have to grab the piston and shim stack out with the Pliers. Mine usually comes out in one unit. Once you do that and get everything out, there should be a total of 11
of which are larger than the other 9
. The stack goes as show in the picture below.
Once you have all of this cleaned and re-lubed, check the seat for any extensive damage. This is what a brand new and undamaged one looks like.
Clean out the inside of the gun body where the LPR Body goes with a Q-Tip. Make sure you don’t get too rough in there and leave behind any cotton fibers/strands.
Your LPR Body after you have cleaned and re-lubed everything should look like this.
Once you are done cleaning and re-lubing everything, you will have to re-insert the LPR back in to the body of the gun. What I do, is screw in the seat retainer by hand and then align the groove on the LPR Body with the hole on the body of the gun where the set screw goes in to keep it in place. While you’re putting the LPR back in to the body of the gun, DO NOT
spin/rotate the assembly because you may mess with the alignment of the groove on the LPR Body and it will not match up with the hole where the set screw goes on the underside of the gun. Once it's back in, simply put back on the LPR Cap and screw the seat retainer in until there's a little resistance, and then back it out however many turns you had your marker tuned to. I recommend starting from scratch and re-tuning the LPR each time you take apart the LPR and since you don't have to do maintenance on the LPR very often, so it's really not a big deal. For detailed videos on that, check the stickies here or for a YouTube video.
Note* If you do not have it properly aligned, the set screw on the underside of the body of the gun will not sit flush/inside the body and it will protrude out, or stick out. If this happens, take the LPR Body out and realign it and try it again. DO NOT jam and force the LPR Body back in to the body of the gun, simply wiggle it, and it will go in.
If I missed anything, or this is not clear enough, I will edit and correct this. This should help though.