Graco Inc PRO 5000, 307-712, 218-745 manual Spray Pattern Troubleshooting Chart

SPRAY PATTERN TROUBLESHOOTING CHART

WARNING

Installing and servicing this equipment requires access to parts which may cause electric shock or other serious bodily injury if the work is not performed properly. Do not install or service this equipment unless you are trained and qualified.

To reduce the risk of serious bodily injury, including splashing fluid or solvent in the eyes or on the skin, always follow the Pressure Relief Procedure Warning on page 9 before checking, adjusting, cleaning or repairing the gun or any part of the system. Disconnect the fluid hose from the gun.

NOTE: Check all possible remedies in the Troubleshooting Charts before disassembling the gun.

PROBLEM:	CAUSE	SOLUTION
IMPROPER SPRAY
PATTERN
Fluttering or spitting	Insufficient fluid supply.	Adjust fluid regulator or fill fluid tank.
spray	Loose fluid nozzle or damaged fluid	Tighten or replace fluid nozzle
	nozzle taper seat.	See page 12.
	Dirt between fluid nozzle, taper seat	Clean. See page 12.
	and body.
	Loose or cracked coupler at fluid inlet.	Tighten or repair.
	Loose fluid tube in cup or tank.	Tighten.
	Fluid build-up on air cap; partially	Clean with soft implement or
	clogged horn holes. Full air pressure	submerge in suitable solvent and wipe
	from clean horn hole forces fan pattern	clean. See page 12.
	toward clogged end.
	Damaged fluid nozzle or air cap holes.	Replace damaged part. See page 12.
	Fluid build-up on the perimeter of fluid	Remove obstruction. Never use wire
	nozzle orifice, or partially clogged fluid	or hard instruments. See page 12.
	nozzle orifice.
	Too high atomization air pressure.	Reduce air pressure or adjust air
		adjusting valve.
	Fluid too thin.	Regulate fluid viscosity.
	Not enough fluid pressure.	Increase fluid pressure.
	Low atomization air pressure.	Increase air pressure.
	Fluid too thick.	Regulate fluid viscosity.
	Too much fluid.	Reduce fluid flow. Reduce fluid
		pressure on pressure feed guns and/
		or adjust fluid adjusting screw until
		proper pattern is obtained.
Streaks	Last coat of fluid applied too wet.	Apply drier finish with multiple
		strokes.
	Too much air pressure.	Use least air pressure necessary.
	Insufficient air pressure.	Increase air pressure.
	Non-uniform spray pattern.	Clean or replace air cap.
		See page 12.

NOTE: Some improper patterns are caused by the improper balance between air and fluid.