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H.E.R.O. INDUSTRIES 1150GSD MANUAL - “B” VERSION
18
TOTAL LOSS OF PRESSURE, HYDRAPULSE MEMBRANE HAS NO MOVEMENT OR
MOVEMENT CAN BE STOPPED. (SEE "HYDRAPULSE MEMBRANE TEST")
1. Hydraulic intake valve (ref# 66) defective. (remove hydraulic feed line,(ref# 67), from hydraulic
intake valve. Plug hydraulic feed line so hydraulic fluid does not drain. Remove hydraulic intake valve
from elbow,(ref# 62). Check hydraulic intake valve to ensure that it flows in one way only, into the
cylinder. Replace if necessary. NOTE; Item cannot be repaired ).
2. Air lock created on hydraulic side of pump. (air entering hydraulic side due to loose hydraulic feed
line fittings, (ref# 67), punctured hydraulic feed line, poor seal at hydraulic intake valve, (ref# 66), or
elbow, (ref# 62). Tighten hydraulic feed line, test for leaks, or apply Teflon tape or pipe sealant on
fittings. Purge air as per detailed instructions below).
3. Pressure control valve ball (ref# 88) worn out/jammed. (remove hydraulic return line, (ref# 73), from
pressure control valve fitting,(ref# 82). Remove pressure control valve,(ref# 74), from elbow, (ref# 62).
Disassemble pressure control valve, by removing valve seat,(ref# 87), from body, (ref# 83). Inspect for
and remove foreign material. Inspect ball for wear. Install pressure control repair kit,(ref# 89), if
necessary).
4. Piston rod (ref# 94) disconnected from piston (ref# 92). (reconnect piston rod following detailed
instructions on page 24-25).
NO PRESSURE, BLUE HYDRAULIC FLUID IN PAINT
1. Hydrapulse membrane broken. (replace with complete hydrapulse membrane,(ref# 54). Closely follow
detailed instructions on page 21. 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# 70), 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# 91), must be
changed in addition to flushing the system. Closely follow detailed instructions on page 24-25).
HYDRAULIC SIDE OF PUMP HAS BEEN REPAIRED AND REASSEMBLED, HYDRAPULSE
MEMBRANE 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# 75), from the valve. Gently pull the P.C. stem,(ref# 82), out. It will pull out about
1/8". Remove the vented hydraulic cap,(ref# 72), from the hydraulic tank,(ref# 69), 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)
PUDDLE OF OIL APPEARING UNDER SPRAYER DURING
OPERATION
1. Hydraulic fitting loose/cracked or hydraulic lines are punctured.
(examine all hydraulic lines and fittings for cracks, breaks or looseness.
Accessory
Item
4-45-3