Maintenance - Graco NOVA 390 PC Operation, Parts

Maintenance

Maintenance
Routine maintenance is important to ensure proper operation of your sprayer. Maintenance
includes performing routine actions which keep your sprayer in operation and prevents trouble
in the future.
Inspect/clean sprayer filter, fluid inlet strainer, and gun
filter.
Inspect motor shield vents for blockage.
Fill TSL by adding through TSL fill point.
Inspect motor brushes for wear. Brushes must be 1/2 in.
(13mm) minimum length. NOTE: Brushes do not wear at
the same rate on both sides of motor. Check both brushes.
Check sprayer stall.
With sprayer gun NOT triggered, sprayer motor should stall
and not restart until gun is triggered again.
If sprayer starts again with gun NOT triggered, inspect
pump for internal/external leaks and check prime valve for
leaks.
Throat packing adjustment
When pump packing begins to leak after extended use,
tighten packing nut down until leakage stops or lessens.
This allows approximately 100 gallons of additional
operation before a repacking is required. Packing nut can
be tightened without O-ring removal.
24
Activity Interval
Daily or each time you spray
Daily or each time you spray
Daily or each time you spray
Every 1000 gallons (3785 liters)
Every 1000 gallons (3785 liters)
As necessary based on usage
334567E