LPR (LOW PRESSURE REGULATOR)
ADJUSTMENTS AND MAINTENANCE
CHANGING THE SEAT RETAINER
1 Unscrew the LPR cap from the
back of the DM9 with a
1
⁄
4
” Allen
wrench.
2 Unscrew and remove the brass LPR
seat assembly using a
3
⁄
16
” Allen
wrench.
3 Use a dental pick or sharp object to
remove the old seat from the retainer
and replace it with a new one. Use a
flat object to press it into place.
4 Lube the #010 O-ring and screw
the seat retainer assembly back into
the LPR assembly.
5 Screw the LPR back cover back
into the DM9.
If the user needs to replace the whole
LPR assembly, follow these instructions:
1 Take the frame off of the marker (see page 13 for removal instructions).
2 Unscrew the LPR set screw from the underside of the body using a
5
⁄
64
” Allen wrench.
3 Unscrew the LPR cap from the back of the DM9 with a
1
⁄
4
” Allen wrench.
4 Pull out the LPR, making sure that the piston is not left in the DM9 body.
5 Insert a new LPR Assembly.
6 Tighten LPR screw lightly, being sure to align it with the keyway cut on the LPR body.
7 Screw the LPR back cover into the DM9 body.
8 Replace frame (see page 13 for replacement instructions).
LPR (LOW PRESSURE REGULATOR)
ADJUSTMENTS AND MAINTENANCE
The LPR pressure can be set
quite accurately even without
an LPR test tool. While the DM9
is degassed, screw the brass
seat retainer clockwise with a
3
⁄
16
” Allen wrench until slight
resistance is felt.
Applying excessive torque to
the seat retainer will damage
the LPR seat.
The LPR is now set to
approximately 20 psi.
Turning out the retainer 180
degrees counterclockwise will
increase the pressure between
10 and 15 psi. For example,
turning the retainer 2.5
complete, 360 degree turns out
will set the pressure to
approximately 70 to 80 psi.
Use a chronograph to fine-tune
the pressure to where the DM9
is consistent.
W
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.
D
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P
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L
.
C
O
M
W
W
W
.
D
Y
E
P
A
I
N
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A
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L
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C
O
M
22
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Summary of Contents for DM9
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