Technical data
14 Aussie Pumps Bertolini Pumps Service Guidelines - July 2008
AUSSIE BLASTER PRESSURE SETTING INSTRUCTIONS
Engine drive blasters
NOTE: These instructions are intended for the use of Authorised Aussie Eco-Clean service
centres only
1. Connect machine to mains pressure water supply, ensuring that water is passing freely through
the pump at the correct flow rate for specified pump by holding the gun trigger open.
2. Check gun nozzle size with gauge to ensure correct nozzle size (see chart). Replace nozzle if
worn.
3. Ensure machine is set up correctly for testing with two gauges, as shown above. Pressure
gauge ‘A’ to be installed on top central valve cap. This gauge will measure the pump pressure.
Pressure gauge ‘B’ is to be installed at the pump outlet on the delivery hose. This gauge will
measure the in-line pressure when gun is shut off. This pressure must not exceed 20%
increase on operating pump pressure. Example: 2000psi pump pressure on gauge ‘A’ with
gun open: when gun is shut off gauge ‘B’ must not exceed 2400psi.
4. To obtain correct pressure at pre-determined rpm:
1. Remove grub screw in unloader lock ring;
2. Wind down unloader until required pressure is achieved. Governor setting on engine will
increase engine rpm automatically once the engine comes under load. This will increase
engine rpm to approximately 3000rpm for Honda GX160.
5. Release trigger on gun to shut off water flow and read gauge ‘B’ to determine the increase in
line pressure (20% increase limit).
6. If test proves OK, repeat procedure for final check.
7. Unwind unloader by half a turn to ensure no pressure loss is indicated on gauge ‘A’ in pump.
8. Apply Loctite 243 Super Thread to grub screw in unloader lock ring and tighten with 1.5mm
allen key.
9. Apply paint seal to grub screw head and thread below unloader lock ring.
10. Check engine rpm and adjust throttle. Do not set engine speed higher than 3200 rpm.
11. Use a 6mm nut to screw onto the throttle adjusting screw and lock tightly against the bracket.
12. Apply paint seal to screw head of engine throttle adjustment screw and protruding thread behind
throttle bracket.
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ussie Pumps Bertolini Pumps Service Guidelines – July 2011