Page 7
HRO-ST3131
Mar 8, 2004
OPERATION
Follow the
“Pressure Relief Procedure”
before operating.
FLUSHING TO CLEAN SYSTEM
Flush the pump, hose and gun with the solvent as
Recommended by your material supplier.
FLUSH THE PUMP BEFORE STARTING
1 Make sure that engine is shut off.
WARNING :
DO NOT INSTALL THE SPRAY TIP .
2 Connect a suction hose to the pump’s fluid inlet or put
in a metal pail containing a gallon of compatible sol-
vents.
3 Close the drain valve.
4 Hold a metal part of the spray gun firmly against the side
of a grounded metal pail and hold the trigger open.
5 Turn the switch to the on position and start.
6 Very slowly turn the pressure regulator clockwise until
the pump starts about 100 P.S.I.
7 Cycle the pump slowly until all air is pushed out, and
fluid is flowing in a steady stream.
8 Release the spray gun trigger and engage the safety
latch in the “Lock” position and carefully
check all connections in the system for leaks.
9 Follow the “Pressure Relief Procedure” and then install
the spray tip in the gun.
WARNING
If there are leaks, shut off the pump immediately
and release system pressure. Follow the “Pressure
Relief Procedure” then tighten connections, start
the pump again and check to be sure leaking has
stopped.
Always use the lowest pressure necessary to get
the desired results, Higher pressures waste fluid
and cause premature wear of the pump
packings and spray tips.
Never allow the pump to run dry of the fluid
being pumped, because a dry pump will quickly
accelerate to a high speed, possibly damage itself.
If the pump accelerates quickly or is running too
fast, shut off pump immediately and check the
fluid supply.
KEY POINTS BEFORE STARTING
TO SPRAY
1
Check the hydraulic fluid level in the tank
2
Check the engine oil level.
3
Check the grounding of the system to prevent
static sparking.
4
Flush the system and test for leaks.
5
Lubricate the pump with Hero piston lubricant
part # 4-02-40-3PL1 in the wet cup.
6
Remove and check gun filter, if used, to
see that it is clean.
7
Closed the prime / drain valve.
8
Check the level of paint in the supply container
and see that the paint has been thoroughly mixed,
and if necessary, thinned.
9
Keep the pump, hose and gun clean inside and
outside.
