TROUBLESHOOTING
PAINT OUTGO VALVE (REF# 22, PART # 4-11A)
The paint outgo valve monitors and controls the flow of spray materials as it leaves the sprayer. It also works together with the paint intake valve, to build paint pressure as specified by the setting made by the hydraulic outgo valve (pressure control valve). A worn outgo valve will result in pulsation in the spray material and cause the paint hose to jump and vibrate vigorously.
PRIME VALVE (REF# 34, PART # 4-606 – NEW)
The prime valve is used at the beginning and end of the spray operation (see "setting up to spray"). The function of the prime valve is to assist in removing air from the paint pump when beginning to spray. It is necessary to remove all air from the paint pump so that the spray material can replace it. The pump will function without the prime valve, however, the initial priming procedure would require considerably longer to complete. During the priming procedure the diaphragm is exposed to its greatest amount of stress. Use of the prime valve and a lightweight thinner, which is compatible with the intended spray material, will reduce diaphragm stress and reduce priming time. The prime valve will also allow you to remove any unused paint left in the pump and hose at the completion of a job. When the prime valve is open the material is pumped through the paint intake and outgo and back to the source by way of the prime valve return hose. When closed, no material should be escaping from the prime valve return hose (ref# 48). If material escapes through the prime valve return hose, when the valve is closed, spray pressure at the gun will be reduced.
The solution to almost all problems can usually be found in the paint side valves. However, before performing any repair or looking further, the following are things which can cause an apparent sprayer failure, without any mechanical problem. ALWAYS check these items before preceding.
1.Circuit breaker open or fuse blown.
2.Motor not plugged in.
3.Motor not switched on.
4.Motor thermal reset popped.
5.Too light or too long of an extension cord.
6.Pressure control knob loose or missing.
7.Spray tip plugged.
8.Spray tip worn out.
9.Gun handle filter plugged.
10.Paint hose plugged.
11.Loose fitting or hole in siphon hose.
12.Intake siphon hose plugged.
13.Siphon screen missing or plugged.
14.Sprayer under pressure when restarting.
15.Strainer bag plugging siphon screen.
UNLESS YOU ARE KNOWLEDGEABLE ABOUT THE REPAIR OF HIGH PRESSURE EQUIPMENT, DO NOT ATTEMPT TO REPAIR AN AIRLESS SPRAYER YOURSELF. ALWAYS FOLLOW ALL SAFETY PRECAUTIONS. THE H.E.R.O. SERVICE VIDEO TAPE
H.E.R.O. INDUSTRIES | 16 | Model 3000 Owner’s Manual |