Graco D Series Operation, Parts page 30

Troubleshooting
Problem
Pump is primed, but can not achieve
good spray pattern.
Spray gun stopped spraying while
trigger is pulled.
30
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.
Extension cord is too long or not
heavy enough gauge.
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.
Solution
Clear spray tip clog. See page 17.
Rotate arrow-shaped handle on spray
tip so it points forward to SPRAY
position. See page 17.
Strain the paint. See page 11.
Align pressure control knob setting
indicator to desired spray setting. See
page 16.
Clean or replace InstaClean fluid
filter. See page 20.
Clean or replace gun fluid filter. See
page 20.
Replace tip. See page 16.
Replace tip. See page 16.
Replace gasket and seal. See page
15.
Clean debris off inlet strainer and
make sure suction tube is immersed
in paint.
Replace extension cord. See page 4.
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 35.
Thin material. Follow manufacturers
recommendations.
Remove section of airless hose.
Clear spray tip clog. See page 17.
See troubleshooting section "Sprayer
runs, but pump does not prime or
looses prime while in use." on page
29.
3A3234E