Clean all strainers and filters in system. Too large a tip size Change to a smaller tip size 2. Relieve pressure and tighten packing take up nut or replace packings. Fluid leakage at upper end or fluid section. Fluid leakage out relief hole at pressure control. Consult manufacturers recommendations on paint container label. Check for external leaks including hydraulic fittings attached to pressure control housing. If pump momentarily starts, internal leak is indicated and fluid section rebuild is necessary. With spray gun trigger closed, allow unit to pump up to pressure and shut off. Hold spray gun trigger in open position and run about 10 seconds until air is purged. Pressure adjusting knob not properly set. Unit will not build or maintain pressure. Replace nozzle tip and you're ready to spray. With nozzle tip removed, trigger gun until heavy material appears at gun. Bring up to pressure, carefully remove pump from solvent container and immerse inlet tube into heavy material to be sprayed. Hold spray gun trigger in open position and run unit about 10 seconds until air is purged. Pump inlet screen plugged or air in pump or hose. Place full cup of paint thinner over end of fluid section and turn on pump. Remove siphon tube and feel lower ball check to be sure it is free to move off its seat. Dried out piston packings and stuck ball valves. Power Source Use a multi-meter to check Unit will not prime. If the light is 'OFF', proceed to Step 3. Check if the green power light on the board is lit. Remove the electrical cover on the bottom of the machine. Ensure the ON-OFF toggle switch is in the 'ON' position and that the Pressure Control Knob is fully CW (maximum pressure). Electrical failure Contact local Airlessco Service Center. Ensure suction nut is tight and lower ball cage O-ring is not worn.

Unit hose air leak (bubbles blowing out bypass hose.) Inspect suction hose for holes, if so equipped. Service upper and lower check ball valve. Upper or lower ball is stuck or obstructed. The displacement pump operates but the unit does not prime. The displacement pump operates but the pressure is too low. The upper check valve ball is not seating properly. The displacement operates, but the output is too low on the upstroke. Service the lower check valve ball check. The lower check valve ball is not seating properly. The displacement pump operates, but the output is too low on the down stroke or both strokes. There is a large pressure drop in the fluid hose.

The fluid displacement pump filter (if used) is clogged. Remove the tip and/or filter and clean them. The motor and displacement pump operates, but paint pressure is too low, or none. The displacement is seized by dried paint. The motor operates, but the paint pump doesn't. Check for loose connections on the siphon assembly, tighten, then re-prime pump. Air entrapped in the fluid pump of the hose. Problem Cause Solution There is spitting from the spray gun.

Wagner 404 plus parts