Graco 3340 User Manual

Page of 24
Operation
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9
3.
Install black (large orifice) chemical tip (Installing 
and Changing Spray Tips, page 9). 
Installing and Changing Spray 
Tips
Spray tips have 4- or 5-digit numbers on them. The first 
two digits are the spray angle. 
*
The chemical injector tip is brass and has a larger 
opening and a black plastic cap.
1.
Follow Pressure Relief Procedure, page 6.
2.
Lock trigger safety.
3.
Without holding your hand over the spray tip (A), pull 
back the quick coupler ring (B). Remove the current 
tip. Install a different tip. Push quick coupler ring 
back into place.
The large orifice of the chemical tip causes a drop 
in pressure that actuates the chemical injector. 
Changing back to a small orifice spray tip, deacti-
vates the chemical injector and produces high pres-
sure for rinsing. The chemical filter can be left in the 
chemical container during high pressure spraying. 
To regulate the flow rate of the chemical, turn the 
chemical adjustment knob on the injector.
ti5439a
Spray Tip No.
Spray Pattern Fan Angle
00XXX
0° blaster (red)
15XXX
15° (yellow)
25XXX
25° (green)
40XXX
40° (white)
Chemical*
XX° (black)
CAUTION
To avoid the high pressure blowing the o-ring out of 
the quick coupler, never operate the pressure washer 
without a tip securely mounted in the quick coupler.
ti5440a
A
B