10
HOW TO CAUSE EXPENSIVE DAMAGE TO YOUR MACHINE
WHAT WAS DONE WRONG: WHAT WAS THE RESULT OF THIS ACTION:
Cracked and burnt high pressure seals in pump.
Machine was allowed to run dry
(without water supply)
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
Unit was run on low volume
water supply and allowed to
cavitate
- 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.
In-Line filter was removed
because “It kept blocking up!”
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.
COMMON MISTAKE:
Put a
smaller HP Jet onto lance for
higher pressure.
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 2nd or 3rd 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
