water leak downstream from the pump can cause your pressure washer to cycle on
The trapped pressure unloader valve is designed so that it uses
the pressure trapped in your hose,
to keep the bypass open.
When the pressure in the
downstream portion of the system drops to the set pressure of your unloader
valve, the bypass circuit closes, allowing pressure into the hose.
normal conditions the pressure is trapped in the hose until the
trigger gun is pulled. When pulled, the drop in pressure
closes the bypass valve and allows pressure into the pressure
hose. As long as the pressure does not exceed the unloader
setting, the bypass circuit remains closed. The bypass
circuit is water the pump is pumping, being sent back to the low
pressure side of the pump.
When you have a leak the hose
pressure gradually bleeds off to the set point of the
unloader When this happens, the hose instantly pressurizes, which causes the
bypass to open again.
Depending on the leakage this could happen every
second or so or only occasionally. In any case it's not good for your
system and the problem should be corrected. Find out where the water is
leaking and fix it. If it's the trigger gun, replace
If it's leaking quick
connectors, replace the o-rings.
here for more information on different types of unloaders and how they work.
SOME OF THESE OPERATIONS CAN BE
EXTREMELY DANGEROUS. IF YOU DO NOT HAVE SUFFICIENT TRAINING IN THESE PROCEDURES, WE RECOMMEND YOU
SEEK ASSISTANCE FROM A