Pressure Relief Procedure; Shutdown; Maintenance - Graco PD44 Operation & Maintenance Manual

Pressure Relief
Procedure
1. Retract the metering rods. See the PD44 Control
Box manual. See Related Manuals on page 3.
2. Close both the A side and B side fluid shut-off
valves.
3. Remove static mixer.
4. Dispense 5 shots. Shots should be at least 75% of
the full stroke.
5. Extend the metering rods into the tubes. If Graco
controls are provided with the system, see the PD44
Controls manual. See Related Manuals on page 3.
6. Close the incoming air shut-off/bleed valve that sup-
plies air to the metering valve.
7. Close the incoming air shut-off/bleed valve that sup-
plies the A feed system. Repeat for the B side feed
system. Refer to feed system manual for pressure
relief procedure. See Related Manuals on page 3.

Shutdown

1. Perform Pressure Relief Procedure.
2. Inspect the metering rods for material buildup.
Clean as necessary.
3. Install storage cap on outlet nose.
313876L

Maintenance

Perform the following procedures once a shift.
NOTE: If material is leaking, see Troubleshooting on
page 26.
Material Reservoirs
Check material levels and refill as necessary. Ensure
that the material reservoirs are properly vented.
Air Dryer
Check the condition of the desiccant air dryer. Replace
as necessary.
Spool Valve Ports
Fill with compatible lubricant such as TSL. See F
on page 21.
Ratio Check
See Ratio Check on page 23.

Pressure Relief Procedure

. 10
IG
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