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H.E.R.O. INDUSTRIES 1100C & 1100NC OWNERS MANUAL
16
2. Pump under pressure. (reduce pressure setting by turning pressure control knob counter-clockwise,
trigger gun to relieve pressure).
3. Too light or too long of extension cord. (replace with correct cord. If distance greater than 100 feet,
obtain and install extra length of H.E.R.O. airless spray hose).
4. Unit's thermal overload switch has opened. (determine and correct cause of overheating).
ELECTRIC MOTOR STALLS/QUITS
1. See "Electric Motor Won't Start/Run
2. Drive belt is loose. (tighten drive belts by evenly turning belt tension bolts on either side of motor
clockwise. Loose belts generally emit loud squealing noises).
3. Unit builds pressure, but pump “seizes” or “stops” when gun is triggered. ( loose belts, tighten).
NO PRESSURE, BLUE HYDRAULIC FLUID IN PAINT
1. Diaphragm broken. (replace diaphragm, (ref# 46). Closely follow detailed instructions on page 20.
NOTE; If, and only if, paint has contaminated the hydraulic side of the pump, the entire hydraulic
system must be cleaned and flushed. Make sure to remove and clean the hydraulic tank screen, (ref#
63), during this process. Refill only with genuine H.E.R.O. LVO hydraulic fluid.
NOTE; If lacquer has contaminated the hydraulic system, the piston seal, (ref# 87), must be changed
in addition to flushing the system. Closely follow detailed instructions on page 23-24).
HYDRAULIC SIDE OF PUMP HAS BEEN REPAIRED AND REASSEMBLED, DIAPHRAGM NOT
MOVING "PURGING"
1. Air lock created on hydraulic side of pump. (when the hydraulic side of the pump is working there is
no air in it. During repairs it is possible that air has been trapped in the hydraulic system. It must be
removed or the pump will not work. To purge the air from the hydraulic system; remove the pressure
control knob, (ref# 71), from the valve. Gently pull the P.C. stem, (ref# 74), out. It will pull out about
1/8". Remove the vented hydraulic cap, (ref# 65), from the hydraulic tank, ref# 62), and install
accessory pressure cap, item 4-45-3. With a bicycle pump, apply a few pounds of air pressure to the
hydraulic tank. This will force the oil through the hydraulic system and push out any of the trapped air.
Wait a few minutes. Remove pressure cap and replace with vented cap. Restart the unit and install
pressure control knob. NOTE: Unit may be running during purging procedure to speed up the
procedure. If a pressure cap is unavailable, simply running the equipment for approximately 5-10
minutes with the P.C. stem pulled out, will purge the system).
TROUBLESHOOTING
SITUATION
POSSIBLE CAUSE (REMEDY)
TOTAL LOSS OF PRESSURE, DIAPHRAGM MOVEMENT CANNOT BE STOPPED OR
ALTERED. (SEE "DIAPHRAGM TEST")
1. Paint too thick. (thin paint according to manufacturer's
Accessory
Item
4-45-3