Operation
8
308352E
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
1. Engage trigger lock.
2. Close all air bleed valves.
3. Disengage the trigger lock.
4. Hold a metal part of the dispense valve firmly to a
grounded metal pail. Trigger the dispense valve to
relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to dispense
again.
7. If you suspect the nozzle or hose is clogged or that
pressure has not been fully relieved:
a. VERY SLOWLY loosen the tip guard retaining
nut or the hose end coupling to relieve pressure
gradually.
b. Loosen the nut or the coupling completely.
c. Clear the obstruction in the hose or nozzle.
Packing Nut/Wet Cup
Before starting, fill the packing nut (2) 1/3 full with Graco
Throat Seal Liquid (TSL) or compatible solvent.
The packing nut is torqued at the factory and is ready for
operation. If it becomes loose and there is leaking from
the throat packings, relieve pressure, then torque the
nut to 136–149 N•m (100–110 ft-lb) using the supplied
wrench (109). Do this whenever necessary. Do not
overtighten the packing nut.
NOTE:
The bleed hole must face down.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop dispensing and before
cleaning, checking, or servicing the equipment.
F
IG
. 3
03820
2
19
21
29
109
20
