DeVilbiss FAC752-3 User Manual download pdf (Page 9)

SB-2-001-H Page 9

CONDITION CAUSE CORRECTION

Jerky or ﬂuttering spray Suction Feed Only

(continued) Material too heavy. Thin or replace.

Container tipped too far. Hold more upright.

Air vent in cup lid clogged. Clear vent passage.

Loose, damaged or dirty lid. Tighten, replace or clean coupling

nut.

Dry or loose ﬂuid needle packing. Lubricate or tighten packing nut.

Fluid tube resting on cup bottom. Tighten or shorten.

Damaged gasket behind ﬂuid tip. Replace gasket.

Unable to get round spray Fan adjustment screw not seating Clean or replace.

properly.

Air cap retaining ring loose. Tighten.

Will not spray No air pressure at gun. Check air supply and air lines.

Internal mix or pressure feed air cap Change to proper suction feed air

and tip used with suction feed. cap and tip.

Fluid pressure too low with internal Increase ﬂuid pressure at tank.

mix cap and pressure tank.

Fluid needle adjusting screw not open Open ﬂuid needle adjusting screw.

enough.

Fluid too heavy for suction feed. Thin material or change to pressure

feed.

Starved spray pattern Inadequate material ﬂow. Back ﬂuid adjusting screw out to

ﬁrst thread, or increase ﬂuid

pressure at tank.

Low atomization air pressure Increase air pressure and re-

(suction feed). balance gun.

Excessive overspray Too much atomization air pressure Reduce pressure.

Gun too far from work surface. Adjust to proper distance.

Improper stroking (arcing, gun motion Move at moderate pace, parallel

too fast). to work surface.

Excessive fog Too much, or too fast-drying thinner. Remix properly.

Too much atomization air pressure. Reduce pressure.

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DeVilbiss FAC752-3 User Manual Page 9