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15 — ENG
Chemical Flow Adjustment
Some pumps are equipped with an adjustable chemi-
cal injector as shown here. Turn the chemical adjust-
ment knob counterclockwise to increase the amount
of chemical used and clockwise to decrease the
amount of chemical used. If the knob is turned
clockwise until it stops, the chemical injector will close
and will not draw any chemicals/soaps.
Thermal Relief Valve:
During normal operation, the water from your cold
water supply circulates inside the pressure washer
pump allowing the pump to maintain a desired operat-
ing temperature. When you stop spraying water
through your wand/lance and the engine is still run-
ning, this is considered the by-pass mode.
When the unit is in the by-pass mode, the water
circulation inside the pump begins to heat up. If the
unit is left in the by-pass mode for more than two (2)
minutes, the water temperature will rise to a danger-
ous level and damage the internal components of the
pump.
In an effort to prevent damage, pumps are equipped
with a thermal relief valve. This valve will open when
the temperature rises too high. This valve will then
release a gush of water in an effort to lower the
temperature inside the pump. Immediately after this
occurs, the valve will close.
OPERATING PROCEDURES (cont'd)
Chemical Adjustment
Thermal Relief Valve
or
or
Turn off Water
DO NOT allow your unit to operate in
bypass mode for more than two minutes at
any time. Overheating of pump will cause
damage to pump.
Shut Down Procedure:
1. If you have siphoned chemicals, siphon a bucket
of clean water through the chemical hose. NOTE:
Failure to do so will cause damage to the pump.
2. Turn engine off. See Engine Owner’s Manual.
NOTE: NEVER turn the water off with the
engine running.
3. Turn water source off.
4. See Storage section in this manual for proper
storage procedures.