Graco GX21 Cordless Operation, Parts page 37

Problem
Pump is primed, but can not achieve
good spray pattern.
Spray gun stopped spraying while
trigger is pulled.
When paint is sprayed, it runs down the
wall or sags.
3A8429A
Cause
Spray tip may be partially clogged.
Reversible spray tip is in UNCLOG
position.
Debris in paint.
Pressure is set too low.
InstaClean fluid filter is clogged.
Spray gun fluid filter is clogged.
Spray tip selected is too large for
capability of sprayer.
Spray tip is worn beyond the capability
of sprayer.
Spray tip gasket and seal worn or
missing.
Inlet strainer is clogged or suction tube
is not immersed in paint.
Battery has insufficient charge for tip
support.
Inlet pump valve or outlet pump valve is
worn or clogged with debris.
Material is too thick.
Airless hose is too long (if extra section
was added).
Spray tip is clogged.
Sprayer lost prime.
Material is going on too thick.
Troubleshooting
Solution
Clear spray tip clog. See, Clear Tip
Clog, page 22.
Rotate arrow-shaped handle on spray
tip so it points forward to SPRAY
position. See page 22.
Strain the paint. See page 11.
Align pressure control knob setting
indicator to desired spray setting. See
page 20.
Clean or replace InstaClean fluid filter.
See page 27.
Clean or replace gun fluid filter. See
page 27.
Replace tip. See page Spray Tip
Installation, page 18.
Replace tip. See Spray Tip
Installation, page 18.
Replace gasket and seal. See page 18.
Clean debris off inlet strainer and make
sure suction tube is immersed in paint.
Charge battery or reduce tip size.
Check for worn or contaminated inlet
valve or outlet valve.
- Prime sprayer with paint
- Trigger gun momentarily
- When trigger is released, pump should
cycle momentarily and stop
- If pump continues to cycle, pump
valves may be worn or contaminated
with debris
- Clean or replace valves with
appropriate kits. See page 40.
Thin material. Follow manufacturer's
recommendations.
Remove section of airless hose.
Clear spray tip clog. See,Clear Tip
Clog, page 22.
See troubleshooting section "Sprayer
runs, but pump does not prime or looses
prime while in use." on page 36.
Move gun faster.
Choose a spray tip with smaller hole
size.
Choose spray tip with wider fan.
Make sure gun is far enough from
surface.
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