Spray Adjustments (Pole Spray Applicator) - Graco ToughTek F340e Operation, Repair, And Parts

Operation

Spray Adjustments (Pole Spray Applicator)

Ref. Description
CA Air Assist Air Line
CB Air Assist Shutoff Ball Valve
CC Rubber Tip Retainer
CD Air Needle (adjustable position)
CE Air Needle Retaining Screw
CF Fluid Housing
CG Tip (Nozzle)
NOTE: See the Pole Spray Applicator manual for model
information.
General Adjustments
The spray pattern can be adjusted by changing:
• Tip (CG) size
• Air flow, use air ball valve (CB)
• Air Needle (CD) position
Adjust Air Flow: Adjust the air assist shutoff ball valve
(CB) for the minimum air flow necessary for a good
pattern. Air bleeds from the applicator nozzle (CG)
whenever the applicator air assist shutoff ball valve (CB)
is open. Close the valve to stop the air flow, if desired.
Otherwise, the air valve can stay open during priming.
Air must be on prior to fluid flow.
Adjust Air Needle (CD) Position: Make sure the air
needle (CD) is slightly behind the tip (CG). The general
rule for setting the air needle position is that the air
needle should be the same distance back from the tip as
the size of the orifice. For example, if you have a 1/2 in.
16
tip installed, the air needle should be approximately 1/2
in. behind the tip.
NOTE: Installing the needle too far forward can restrict
or completely block material flow. This can result in the
retainer (CC) blowing off. Installing the needle too far
back can raise the pressure behind the fluid enough to
blow the retainer (CC) off and can cause dripping.
Air Flow Valve Adjustment
To decrease air flow, turn valve knob clockwise. To
increase air flow, turn valve knob counterclockwise.
Check material and thin as needed to maintain the
proper consistency. The material may thicken as it sits
and could slow down application or affect the spray
pattern.
Flush and dry applicator thoroughly at the end of each
use. Tips and retainers must be cleaned by hand.
Material Flow Adjustment
For a lighter spray pattern, adjust the air needle closer
to the fluid nozzle and/or reduce the fluid flow.
For a heavier spray pattern, adjust the air needle farther
back from the fluid tip and/or increase the fluid flow.
NOTE: Withdrawing the needle too far can force air
pressure back into the fluid hose, which can slow
material flow.
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