Texture Sprayer Trouble Shooting Guide

Problem

Cause

Solution

Sprayer will not run Power switch not on Turn switch on.
No power at wall outlet Check outlet by plugging in another appliance. If appliance does not work, try another outlet.
Breaker tripped Reset breaker
Pump won’t pump material Mix too thick Add water to thin material. Use Material
Thickness Gauge.
Selector switch in wrong position Move selector switch to correct position
for application.
Loose fittings Check and retighten all fittings.
Pump hose worn out Replace hose. Recommended hose
replacement - once every year.
Plugged gun Relieve Pressure,
Pump cold Move pump to warm room and allow it to warm up or run hot water through sprayer
Air lock Open air valve on gun.
Material runs out of bottom of sprayer Pump hose worn out Replace hose.
Loose fittings Check and retighten all fittings.
No air from compressor Gun air valve closed Open gun air valve.
Low voltage Check extension cord length and gauge. Replace if different than recommended. Refer to Grounding and Electrical Requirements
Gun needle plugged Clean needle and retry
Worn compressor Replace compressor. Contact a qualified Graco Service Center.
Damaged hose Replace hose.
Lines not connected Check all quick disconnect connections to gun and hoses.
Speed of application slow or slower Material too thick Thin material.
Thin material. Nozzle too small Change nozzles to a larger size.
Pump hose worn Replace hose.
Plugged or dirty gun Relieve Pressure, Clean gun.
Gun adjustment set too low Increase flow adjustment with flow adjustment nut.
Extension cord too long or wrong gauge Use a different extension cord. Refer to Grounding and Electric Requirements
Too much air being used. Partially close gun air valve to reduce air flow.
Intermittent flow/sputtering Hopper connection not tight Check gasket. Tighten connection
Debris in system Clean system.
Quick disconnect does not stay connected. Dirty or corroded fitting Clean thoroughly. Soak in oil. Apply a few drops of light oil.
Tip is partially clogged. Clear Tip
Fluid supply is low or empty. Refill fluid supply. Prime pump. Check fluid supply often to prevent running pump dry.
Gun will not shut off Worn nozzle or needle. Relieve Pressure. Replace worn parts
Debris in needle passage Relieve Pressure, clean
Pump output is low Intake valve ball and piston ball are not seating properly Remove intake valve and clean. Check balls and seats for nicks; replace if necessary. Strain paint before using to remove particles that could clog pump
Fluid filter, tip filter, or tip is clogged or dirty. Clean filter
Prime valve leaking Relieve pressure. Repair prime valve.
Verify pump does not continue to stroke when gun trigger is released. Service pump
Leaking around throat packing nut which may indicate worn or damaged packings. Replace packings; see pump manual. Also check piston valve seat for hardened paint or nicks and replace if necessary. Tighten packing nut/wet-cup.
Low stall pressure Turn pressure knob fully clockwise. Make sure pressure control knob is properly installed to allow full clockwise position. If problem persists, replace pressure transducer.
Large pressure drop in hose with heavy materials Use larger diameter hose and/or reduce overall length of hose.
Small irregularities of new clutch surfaces grind together and cause noise Clutch surfaces need to wear into each other. Noise will dissipate after a day of run time.
Pump stops pumping Stalled pump Shut down system. Relieve pressure,
Pulsing or surging material Triggering too fast Slowly squeeze trigger to fully open position while moving gun quickly in a circular motion.
Pattern too fine or too much overspray Material too thin Thicken material. Material must be mixed thoroughly to a consistency that immediately folds back in as you draw your finger through the surface of the material.
Air pressure at gun too high Decrease air to gun at gun fitting and/or regulator.
Fluid delivery too low Increase nozzle size. Increase air pressure to pump, or decrease air to gun at gun fitting and/or regulator Turn fluid knob out on gun.
Pattern too coarse Material too thick Thin material. Material must be mixed thoroughly to a consistency that immediately folds back in as you draw your finger through the surface of the material.
Air pressure at gun too low Increase air to gun at gun fitting and/or regulator.
Fluid delivery too high Decrease nozzle size. Decrease air pressure to pump, or increase air to gun at gun fitting and/or regulator. Turn fluid knob in on gun.
Soft start won’t work/pump, always loaded Sensor is bad Change sensor
Air leak due to bad seal keeps valve open Replace seal
Normal soft start system delay Release trigger for 10-15 seconds. Retry.
Switch is not operating properly Replace switch
Damaged solenoid valve on cylinder Check gun supply, hose and sprayer for leaks
Air leak Check gun supply, hose and sprayer for leaks
Needle adjustment won’t adjust Dirty threads Clean threads
Nozzle not on gun Put nozzle on gun
Flow nut set to maximum adjustment Turn flow nut adjustment the other
way