Graco C Series Instructions-Parts List Manual page 3

Removing & Installing a Pump Assembly
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
D are instructed to relieve the pressure,
D stop spraying,
D check or service any of the system equipment,
D or install or clean the spray tip.
Pressure Relief Procedure
1. Lock the gun trigger safety.
2. Turn the engine ON/OFF switch to OFF.
3. Move the pressure control switch to OFF.
4. Unlock the trigger safety. Hold a metal part of the
gun firmly to the side of a grounded metal pail, and
trigger the gun to relieve the pressure.
See Fig. 4, A.
5. Lock the gun trigger safety.
6. Open the pressure drain valve. Leave the valve
open until you are ready to spray again.
7. Disconnect the spark plug cable.
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved
after following the steps above, VERY SLOWLY
loosen the tip guard retaining nut or hose end coupling
to relieve the pressure gradually, then loosen com-
pletely. Now clear the tip or hose.
Removal
WARNING
INJECTION HAZARD
To reduce the risk of serious bodily
injury, always follow the Pressure Relief
Procedure before repairing the sprayer.
1. Flush sprayer. Remove suction hose, if used.
WARNING
MOVING PARTS HAZARD
To reduce the risk of pinching or ampu-
tating a finger, keep fingers away from
the area of the connecting link and pin
while jogging the engine.
2. Start the engine. Jog the pressure control ON/OFF
switch until the connecting rod (C) stops near the
bottom of the stroke and is fully exposed. See Fig
2. Shut off the engine.
3. Unscrew collar (J) of power supply cord and un-
plug it from pressure control (F). See Fig 3.
4. Relieve pressure. See page 2.
5. Remove the outlet hose. Slightly loosen the two
pump mounting screws (D). See Fig 2.
6. Use a small screwdriver to push in the connecting
rod pin (231) just until you can gently pry the re-
taining ring (B) up from the back of the connecting
rod. Push the pin in so it falls out the back.
7. Remove the two mounting screws while supporting
the weight of the pump with your free hand.
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