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H.E.R.O. INDUSTRIES LTD. 1100MD OWNERS MANUAL - “B” VERSION
15
TROUBLESHOOTING
HYDRAPULSE MEMBRANE 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
"Hydrapulse Membrane 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 (ref# 16-28) and Outgo valve (ref#32) make up
the paint valves. Refer to pages where exploded views of these valves are shown.
To eliminate the hydraulic side of the pump (piston / oil side of hydrapulse membrane) as a source of
problems;
1. Remove the intake valve end cap (ref# 16) by removing the four cap screws (ref# 14). The intake valve
assembly, (ref# 16-24), will generally come off as an entire assembly, requiring no further dismantling.
If the ball guide (ref# 23) and ball stop (ref# 24), remain in the paint head, they can be pried free with a
screwdriver.
2. Start unit.
3. Increase the pressure by turning the pressure control knob (ref# 71) clockwise to full pressure.
4. Put pressure on the center of the exposed hydrapulse membrane with the handle of a screwdriver or
other blunt object.
NOTE: The hydrapulse membrane is located between the paint head (ref# 27) and the hydraulic head
(ref# 51)
5. If 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.
-ABLE to stop or alter the hydrapulse membrane's movement, then the hydraulic pump is not operating
properly. The problem is located in the “Hydraulic” pump. See troubleshooting guide for additional
information.
16
14
51 27