General Problem
Possible Cause
Solution
TROUBLESHOOTING GUIDE
(Continued On Next Page)
No Fluid Flow
Fluid Will Not
Shut Off
Paint Leakage
Air Leakage
Low Fluid Flow
Plugged fluid inlet
Item 11 (regulating needle and seat) stuck
No pilot air
Ruptured Item 9 (upper diaphragm)
Ruptured Item 14 (center diaphragm)
Dirt in Item 11 (regulating needle/seat)
Pilot air not shut off
Broken Item 12 (spring)
Item 4 (screws) loose
Ruptured Item 8 (lower diaphragm)
Item 13 (retaining plug) loose
Loose fluid fitting
Item 10 (o-ring) pinched
Loose air fitting
Item 4 (screws) loose
Ruptured Item 9 (upper diaphragm)
Ruptured Item 14 (center diaphragm)
Incorrect regulator ratio
Fluid supply pressure to low.
Air pilot to low.
Flush clean.
Remove and clean or replace.
Check air pilot signal.
Rebuild regulator.
Rebuild regulator.
Remove and clean or replace. (Must be replaced
as a set, see "Maintenance" section.)
Check signal air supply.
Replace item 12 (spring).
Tighten per "Assembly Procedure" in the
"Maintenance" section.
Rebuild regulator.
Tighten, torque to 25-30 lbs•ft
(see "Maintenance" section).
Tighten.
Replace Item 10 (o-ring).
Tighten.
Tighten.
Rebuild regulator.
Rebuild regulator.
Refer to "Operations" section for correct
sizing information.
Increase fluid supply pressure. (Do not exceed
100 psig (see "Specifications" in the
"Introduction" section).
Check air pilot signal.
LN-9223-00-R12 (04/2018)
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MAINTENANCE
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