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DR-1 Plastic Fluid Regulator - Maintenance
TROUBLESHOOTING GUIDE
General Problem
No Flow
Will Not Shut Off
Paint Leakage
Air Leakage
Inconsistent Flow
13
Cause
1. Plugged inlet
2. Item 11 (needle and
seat) stuck
3. No pilot air
1. Item 11 (needle and
seat) dirty
2. Pilot air not shut off
1. Item 4 (screws) loose
2. Ruptured Item 8 (lower
diaphragm)
3. Loose fluid fittings
4. Pinched Item 10 (o-ring)
1. Loose air fitting
2. Item 4 (screws) loose
3. Ruptured Item 14 (cen-
ter diaphragm)
1. Incorrect regulator ratio
used
2. Diaphragm stretched
from excessive air pres
sure
3. Ruptured Item 9 (upper
diaphragm)
4. Inconsistent air pilot sup-
ply
5. Low inlet fluid pressure
Solution
1. Flush clean
2. Remove and clean or replace
3. Check air pilot
1. Remove and clean or replace
2. Check air supply
1. Tighten per "Assembly Procedures"
2. Rebuild regulator
3. Tighten
4. Replace
1. Tighten
2. Tighten per "Assembly Procedure"
3. Rebuild regulator
1. Refer to "Operation" section for correct
sizing information
2. Rebuild regulator
3. Rebuild regulator
4. Check air source
5. Inlet pressure must be at least 10 psi
above outlet pressure, 100 psi maximum
LN-9228-00.3
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