Graco EcoQuip 300 Operation, Repair, And Parts page 27

Pneumatic Pneumatic Blast Pneumatic Blast Control Blast Control Circuit Control
1. At the Air-Relay, disconnect the push-to-connect
tubing and check the trigger circuit (from the blast
control handle).
334143C
Circuit Circuit
2. With the blast control activated, confirm that
there is air flowing from the disconnected tube.
NOTE: NOTE: The air flow should be at supply air NOTE:
pressure but the air volume is reduced due to
the size of the fittings and tubing. If you do not
get supply air pressure, check the blast control
handle for proper operation, and check the blast
control hoses to make sure they are not kinked
or internally blocked.
3. Check the in-line filter at the industrial interchange
nipple connection on the side of the panel (where
you attach the blast control hose).
4. If the previous steps do not fix the issue, replace
the air relay (Kit EQ5179).
Troubleshooting
27