Graco GX21 Cordless, Operation, Parts

Page: 37 / 48

Troubleshooting
3A8429A 37
Pump is primed, but can not achieve
good spray pattern.
Spray tip may be partially clogged. Clear spray tip clog. See, Clear Tip
Clog , page 22.
Reversible spray tip is in UNCLOG
position.
Rotate arrow-shaped handle on spray
tip so it points forward to SPRAY
position. See page 22.
Debris in paint. Strain the paint. See page 11.
Pressure is set too low. Align pressure control knob setting
indicator to desired spray setting. See
page 20.
InstaClean fluid filter is clogged. Clean or replace InstaClean fluid filter.
See page 27.
Spray gun fluid filter is clogged. Clean or replace gun fluid filter. See
page 27.
Spray tip selected is too large for
capability of sprayer.
Replace tip. See page Spray Tip
Installation , page 18.
Spray tip is worn beyond the capability
of sprayer.
Replace tip. See Spray Tip
Installation , page 18.
Spray tip gasket and seal worn or
missing.
Replace gasket and seal. See page 18.
Inlet strainer is clogged or suction tube
is not immersed in paint.
Clean debris off inlet strainer and make
sure suction tube is immersed in paint.
Battery has insufficient charge for tip
support.
Charge battery or reduce tip size.
Inlet pump valve or outlet pump valve is
worn or clogged with debris.
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.
Material is too thick. Thin material. Follow manufacturer’s
recommendations.
Airless hose is too long (if extra section
was added).
Remove section of airless hose.
Spray gun stopped spraying while
trigger is pulled.
Spray tip is clogged. Clear spray tip clog. See, Clear Tip
Clog , page 22.
Sprayer lost prime. See troubleshooting section “Sprayer
runs, but pump does not prime or looses
prime while in use.” on page 36.
When paint is sprayed, it runs down the
wall or sags.
Material is going on too thick. 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.
Problem Cause Solution