YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 30
DP-2010RXN ver.07022002
SSSSS
ECTION
ECTION
ECTION
ECTION
ECTION
10 :
10 :
10 :
10 :
10 : S
S
S
S
S
Y
YY
Y
YSTEM
STEM
STEM
STEM
STEM
M
M
M
M
M
AINTEN
AINTEN
AINTEN
AINTEN
AINTENANCE
ANCE
ANCE
ANCE
ANCE
Cleaning and lubricating the DP-2000 pump:
1. Close the isolation valve.
2. Disconnect the plastic tubing from the sole-
noid valve to the pump diaphragm housing by
depressing the tubing release sleeve on the
diaphragm housing fitting while pulling out the
tubing. It is not necessary to remove the
fitting from the diaphragm housing.
3. Remove the sample discharge (1/8" stainless
steel tubing) from the pump body.
4. Screw the stroke adjustment knob all the way
down to the 0 cc/stroke setting.
5. *Unscrew the pump body by hand from the
inlet check valve assembly. Separation at
this point is recommended to maintain proper
tubing location and alignment between the
pump body and the probe body. Do not
remove the inlet check valve body from the
manifold unless cleaning is necessary. To
replace the inlet check valve o-ring, carefully
cut the o-ring off the head of the dart and
stretch the new o-ring over the head of the
dart using a light coat of assembly grease.
6. Remove the diaphragm housing from the
pump body by unscrewing the diaphragm
housing and carefully pulling the plunger out
of the pump body. Inspect the plunger shaft
for damage or wear. The diaphragm cham-
ber houses the diaphragm, return spring,
stroke adjustment screw and plunger assem-
bly. The diaphragm chamber should not be
disassembled unless one of these items
needs replacing.
*Screw the stroke adjustment screw all the
way down.
figure 24
11.2 a
11.2 c
11.2 e
11.2 f
11.2 d
11.2 b
2
3
4
5
6
1
