Pressure Relief Procedure - Graco ToughTek MP Series Operation

Pressure Relief Procedure

Follow the Pressure Relief Procedure
whenever you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as splashing fluid and moving
parts, follow the Pressure Relief Procedure when you
stop dispensing and before cleaning, checking, or ser-
vicing the equipment.
1. Push the STOP button (U).
2. Hold the hose outlet firmly against a designated
waste container.
3. Turn the speed control knob (V) to speed 1.
4. Hold the pump direction switch (W) in the REV
position and push the START button (U).
5. Allow the pump to run in reverse for several seconds
while holding the pump direction switch (W) in the
REV position.
3A4789E
NOTE: If the pump is stalled, do not run the pump
for more than five seconds at a time or the motor
control could encounter an overload error. After mul-
tiple attempts to free the pump, allow the motor to
cool for one minute.
6. Push the STOP button (U) after five seconds and
release the pump direction switch (W). The switch
will return to its normal FWD position.
7. Turn the main power disconnect switch (T) to OFF.
8. If you suspect the hose is still clogged or that pres-
sure has not been fully relieved after following the
previous step:
a. Starting at the open hose outlet, VERY
SLOWLY open the coupling while maintaining
control of the hose.
b. Clear the hose. If there is still pressure trapped
down the line, work your way back to the pump
by individually opening each coupling between
each hose connection. Maintain control of each
hose and VERY SLOWLY open each coupling
until pressure has been fully relieved.
Operation
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