Service; Pressure Relief Procedure; Pump Repair Kits; Tools Needed - Graco A Series Repair Manual

Service

Service

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 skin injection, splashing
fluid and moving parts, follow the Pressure Relief Pro-
cedure when you stop spraying and before cleaning,
checking, or servicing the equipment.
1. Engage trigger lock.
2. Turn ON/OFF switch to OFF.
3. Unplug power cord.
4. Disengage trigger lock. Hold metal part of gun
against grounded metal pail and trigger gun into pail
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 spray again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after follow-
ing the steps above, VERY SLOWLY loosen tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction.
4

Pump Repair Kits

Pump
16X414 248212
16X419 248213 (stainless steel check balls)
249189 (ceramic check balls)
16X426 249123 (stainless steel check balls)
17A578 (ceramic check balls)
16X427, 17A578 (ceramic check balls)
17N694
16X418 24V063
16X421 249189
16Y602 24M830
16X420 17K162 (stainless steel check balls)
16Y599 17K475 (ceramic check balls)
17N693 17N703 (ceramic check balls)
17R042 17R119 (ceramic SI-N check balls)
17R044 17R114 (ceramic SI-N check balls)

Tools Needed

• Vise
• 12 in. adjustable, open-end wrench (2)
• Hammer (20 oz maximum)
• Small screwdriver
• Throat Seal Liquid
• Pick or long small screwdriver

Cleaning and Inspecting Parts

Clean and inspect parts. Pay particular attention to the
ball seats in the intake valve and piston, which must
have no nicks or wear, and to the inside of the sleeve
and the outside of the piston rod, which must not be
worn or scratched. Replace worn or damaged parts.
COMPONENT RUPTURE HAZARD
To reduce the risk of serious injury from pressurized
fluid, never use sharp or pointed tools to remove
sleeve. If the sleeve cannot be removed easily, return
the sleeve and cylinder to a Graco distributor for
removal.
NOTE: Remove and clean sleeve when repacking pump.
Repair Kit
332922D