TROUBLESHOOTING
PRESSURE TEST
To verify the performance of an airless sprayer, use of pressure gauge is required. A pressure gauge (min. 3000 psi) installed at the gun, using a new .021 tip, and not less than 50 feet of H.E.R.O. airless spray hose is needed. If you do not have access to these items, your local H.E.R.O. authorized service center will be able to perform this test. Your model 300S/SL is manufactured to perform at;
2650 psi
2250 psi
If your unit is unable to perform to the above pressure levels consult the troubleshooting guide for the required repair procedure.
DIAPHRAGM TEST
If your unit is disabled and you are unable to perform a pressure test, use the following procedures for determining the area to repair. This test will divide the two halves of the equipment (hydraulic from paint) and make identification of your solution easier to obtain. This test is commonly referred to as the "Diaphragm Test"
The solution to almost all problems can be found in the paint side valves, due to the increased wear from contact with the abrasive paint/spray materials. Intake valve assembly (ref#
(piston side of diaphragm) as a source of problems;
1Remove the intake valve end cap (ref# 11) by removing the four cap screws (ref# 9 ).
2Remove large spring (ref# 15).
3Start unit.
4Increase the pressure by turning the pressure control knob (ref# 74) clockwise to full pressure.
5Put pressure on the center of the exposed diaphragm with the handle of a screwdriver or other blunt object. NOTE: The diaphragm is located between the paint head (ref# 18) and the hydraulic head (ref# 53)
6If you are UNABLE to stop or alter the hydrapulse membrane's movement, then the hydraulic side is operating properly. The problem is located in the “Paint” pump. See troubleshooting guide for additional information.
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H.E.R.O. INDUSTRIES | 17 | 300S / 300SL LEGEND Owner’s Manual |
