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4.2 How to cause expensive damage to your Water Blaster!
WHAT WAS DONE WRONG:
WHAT WAS THE RESULT OF THIS ACTION:
Cracked and burnt high pressure seals in pump.
No. 1 piston cracked due to thermal shock.
Mechanical damages to EVERYTHING:
-
Pistol, HP hose, pump valves, pistons
-
Crankshaft bearing failure
-
Pressure gauge failure
-
By-pass valve excessive wear & tear
-
Frequent O-rings blow outs
-
Brass heads deformed
Over adjust by-pass valve to try and increase
PSI
Dump pressure was too high. Hydraulic hammer to
system every time trigger is closed. PSI was increased 5-
fold normal working pressure.
Excessive wear & tear on pistons / valves / seals / HP
jets.
Excessive blocking of filters caused by bore or recycled
water with high salt / mineral content. Pump clogged up
with debris.
Remember: Spec requirement says: “Potable water”
Over-revved engine for more PSI
Engine & Pump premature wear & tear. (Most increased
PSI pressure is lost through by-pass valve and only
small increase in pressure is achieved doing this!) Lost
of waster horse power!
When orifice is reduced, the PSI will rise and then by-
pass valve will dump (thinking the pistol is shut). Most
extra PSI will be dumped and only a slight increase in
PSI will be achieved.
Engine, By-pass valve & Pump premature wear & tear.
Using Contaminated Fuel (“Had to remove
fuel filter to keep engine running!”)
Excess Fuel-system clean-outs required. If excessive
corrosion in carburetor or injectors is detected after the
2
nd
or 3
rd
in-line fuel filter replacement, then this should
ring alarm bells.
Park machine where debris blows all over it.
Reverse bulldozer over it.
Our machines are rugged and strong – but not battle
tanks!
Hire units long-terms and fluid levels are not
checked.
Con-rod through the crank case!
Modify 240 Volt electric unit to override
thermal overload on motor.
Stop-Start capacitors melted.
Used 100m extension lead and a 5 Kva Gen-
Set.
A 10% low current is equivalent to a 50% over-load.
Our 3 hP 240 Volt motors require 8 Kva Gen-Set
minimum!
Run trucks, fork-lifts, tracked excavation
equipment over hoses and lance
assemblies/pressure guns.
Needs replacing of damaged parts
Hire rental machines are pilfered of parts and
returned claiming it didn’t work and demands
credit!
It happened!
Machine was allowed to run dry (without water
supply)
Unit was run on low volume water supply and
allowed to cavitate
In-Line filter was removed because “It kept
blocking up!”
COMMON MISTAKE:
Put a smaller HP Jet
onto lance for higher pressure.
