Graco EcoQuip 300 Operation, Repair, And Parts page 25

Problem
Problem Problem
A strong hose recoil occurs
frequently when the blast
control switch is engaged.
334143C
Cause
Cause Cause
The unit is not on a level surface.
The initial pot pressure is not set
correctly.
The Auto-Vent is malfunctioning.
The diaphragm needs to be
flushed.
Troubleshooting
Solution
Solution Solution
Place the unit on a level surface. If this
is impossible, the Auto-Vent must be on
the higher side of the unit.
Confirm that the auto-vent valve is
working and set initial pot pressure 30
psi (2.0 bar, 0.20 MPa) above the blast
pressure.
Perform auto-vent clean-
ing procedure (see
Cleaning the Auto-Vent Valve, page
Perform the diaphragm
flush procedure (see
Flushing the Diaphragm Valve, page
If flushing does not solve the problem, see
Repairing the Diaphragm Valve, page
31).
29).
30.
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