When servicing your marker:
• Make sure your hopper is removed from the DM9.
• Make sure there are no paintballs in the breech of the DM9.
• Always remove the air supply and relieve all gas pressure in the DM9
before disassembly.
• It is not recommended for the user to remove the LPR from the body
and disassemble it.
LPR (LOW PRESSURE REGULATOR)
ADJUSTMENTS AND MAINTENANCE
LPR ASSEMBLY, CLEANING, TESTING
AND CHANGING SEALS
The Low-Pressure Regulator (LPR) is
located at the back of the DM9
under the bolt (see page 23). The
function of the LPR is to lower the
air pressure supplied to the
marker by the in-line before it
reaches the solenoid. This
pressure is used to move the bolt
forward and back. The factory
setting is 75 PSI. You can fine tune your DM9 to
its minimum cycle pressure. This will reduce the
amount of force of the bolt hitting the ball
(reducing ball breaks) and help with efficiency. Too low
of pressure will cause the bolt to not fully cycle, move
sluggishly or not at all. If you experience dramatic shoot down during rapid
fire, the LPR may be adjusted too low. Too high of pressure will cause excess kick, potentially
increase ball breakage, and cause fatigue on the bolt components.
It is important to keep the seat and piston face clean of all dirt and debris. Clean the seat and
piston face and grease the retainer O-ring every six months or 60,000 shots.
LPR (LOW PRESSURE REGULATOR)
ADJUSTMENTS AND MAINTENANCE
The LPR has five components and six seals
1 Piston O-ring (012 BN70)
6 Body internal O-ring (007 UR90)
2 Piston
7 Seat (mounted in the seat retainer)
3 Shim stack
8 Seat retainer O-ring (010 BN70)
4 LPR Body
9 Seat retainer (functions as an adjustment screw also)
5 Body O-rings (2 pcs, 012 BN70)
The only user-serviceable part in the LPR is the seat retainer (see page 22). This seal needs to be
changed in the unlikely case the LPR is allowing gas through the regulator, increasing pressure
sent to the solenoid.
1
2
3
9
8
5
5
6
7
4
W
W
W
.
D
Y
E
P
A
I
N
T
B
A
L
L
.
C
O
M
W
W
W
.
D
Y
E
P
A
I
N
T
B
A
L
L
.
C
O
M
21
20
Summary of Contents for DM9
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