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Pressure Relief Procedure
332089B 17
Pressure Relief
Procedure
1. Retract the metering rods. See the 4104A Control
Box manual.
2. Close the fluid shut-off valve.
3. Remove needle.
4. Dispense 5 shots. Shots should be at least 75% of
the full stroke.
5. Extend the metering rod into the tubes. If Graco
controls are provided with the system, see the
4104A Controls manual.
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 feed system. Refer to feed system manual
for pressure relief procedure.
Shutdown
1. Perform Pressure Relief Procedure.
2. Inspect the metering rod for material buildup. Clean
as necessary.
3. Lubricate the metering rod with compatible lubricant
such as mesamoll or silicone oil.
4. Remove needle and replace with an airtight cap.
Maintenance
Perform the following procedures once a shift.
NOTE: If material is leaking, see Troubleshooting on
page 18.
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.
Metering Rod Port
Lubricate with compatible lubricant such as mesamoll or
silicone oil. See FIG. 7 on page 14.
Spool Valve Port
Fill with compatible lubricant such as mesamoll or sili-
cone oil. See FIG. 7 on page 14.