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User's Manual

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LPR (LOW PRESSURE REGULATOR)
ADJUSTMENTS AND MAINTENANCE
LPR ASSEMBLY, CLEANING,
TESTING AND CHANGING SEALS
The Low-Pressure Regulator
(LPR) is located under the frame
between the Hyper3™ and
Trigger Guard (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 M8 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 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
the marker not to shoot as smoothly, potentially increase ball breakage and cause undue wear and
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.
The LPR has five components and six seals
1 Piston large O-ring (012 BN70) 6 Piston small O-ring (007 UR90)
LPR (LOW PRESSURE REGULATOR)
ADJUSTMENTS AND MAINTENANCE
2 Piston 7 Main seal (mounted in the seal retainer)
3 Shim stack 8 Seal retainer O-ring (010 BN70)
4 Body 9 Seal 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 seal retainer. This seal needs to be changed in the
unlikely case the LPR is creeping up.
When servicing your marker:
• Make sure your hopper is removed from the M8.
• Make sure there are no paintballs in the breech of the M8.
• Always remove the air supply and relieve all gas pressure in the M8
before disassembly.
• It is not recommended for the user to remove the LPR from the body
and disassemble it.
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PM8 manual-FINAL.qx6 10/4/07 1:07 PM Page 23