ProMark
8.2
mAINTAININg The fIlTer ASSemBly
Clean the filter regularly. Dirty or clogged filters
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can greatly reduce filtering ability and cause
a number of system problems including poor
spray patterns, clogged spray tips, etc.
cleANINg (fIg. 17)
To clean the filter, perform the following procedure.
1. Make sure a solvent flush (section 6.3) has been performed.
2. Remove the filter cap assembly (1) and spring (2).
3. Pull the filter element with ball straight (3) out of the filter
body (4).
4. Clean inside the filter body, filter element with ball, and
filter cap assembly using the appropriate solvent.
fIgure 17
1
2
3
7
8
5
6
4
Use care in handling parts as dirt, debris,
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scratches, or nicks may prevent o-rings or gaskets
from sealing.
This filter element filters from the inside out. Be
sure to clean the filter element thoroughly on the
inside. Soak in solvent to loosen hardened spray
material or replace.
INSpecTIoN (fIg. 17)
Inspect all parts of the filter assembly before reassembly.
1. Inspect the ball inside the filter element. If the ball has
pressure cuts or scratches, replace the filter element.
a. If the ball is cut, remove the PTFE o-ring (5) using an
o-ring pick and remove the carbide seat (6).
b. Check the seat for nicks or grooves. If the seat is
damaged, replace.
Removal of the PTFE o-ring will damage the
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o-ring and require replacement.
2. Remove the spring (2) from the spring guide on the filter
cap.
a. Measure the length of the spring uncompressed. If it
measures less than 3/4" from end to end, replace.
b. Push the spring back onto the spring guide until it
"snaps" back into position.
3. Inspect the two PTFE gaskets (7,8) and the PTFE o-ring (5)
for deformity, nicks, or cuts. Replace, if needed.
The PTFE gaskets, PTFE o-ring, and spring are
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packaged in Filter Service Kit P/N 930-050.
reASSemBly (fIg. 17)
After cleaning and inspecting all parts, reassemble the filter.
1. Place the carbide seat (6) into the filter body (4). Make sure
the beveled side of the seat is facing up.
2. Place the PTFE o-ring (5) into the groove on the outer
diameter of the carbide seat (6).
3. Place the filter element with ball (3) into the filter body (4).
The top and bottom of the filter element with
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ball are identical.
4. Push the spring (2) back onto the spring guide of the filter
cap (1) until it "snaps" back into position, if not already
done.
5. Place the thin PTFE gasket (8) onto the step at the top of
the filter body (4).
6. Place the thick PTFE gasket (7) onto the top of the thin
gasket (8).
7. Tighten the filter cap assembly (1) onto the filter body (4).
cleanup
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