Troubleshooting Charts - Graco C Series Instructions Manual

WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including
fluid splashing in the eyes or on the skin, before
servicing the regulator, always close the fluid
shut-off valve and
downstream of the regulator.
PROBLEM:
No pressure regulation
Fluid leaks from under
housing (1)
Pressure creeps above
setting
Pressure drops below
setting
TROUBLESHOOTING CHART
relieve fluid pressure
CAUSE
Damaged diaphragm (26).
Broken spring (14)
Loose cap (19).
Worn or damaged gasket (25).
Worn or damaged diaphragm (26).
Fluid flow shut-off downstream of
fluid regulator.
Loose cap (19).
Worn or damaged gasket (25).
Worn or damaged diaphragm (26).
Empty/clogged supply line
Clogged air spray gun or fluid
dispensing valve.
Using regulator beyond its rated flow
capacity, see back cover.
Loose cap (19).
Worn or damaged gasket (25).
Clogged supply line
Clogged air spray gun or fluid
dispensing valve.
NOTES:
1. Check all possible remedies in the Troubleshooting
Chart before disassembling the regulator.
2. Reference numbers in parentheses in the chart refer
to the numbers in the figure drawings and parts draw-
ing. See the SERVICE Section to repair the regula-
tor.
SOLUTION
Replace diaphragm.
Replace spring.
Tighten screws (1).
Replace gasket.
Replace diaphragm.
Open fluid flow downstream.
Tighten screws (1).
Replace gasket.
Replace diaphragm.
Fill/flush supply line.
Replace, see gun or valve manual
for service instruction.
Install additional regulators.
Tighten screws (1).
Replace gasket.
Flush supply line.
Replace, see gun or valve manual
for service instruction.