Pressure Relief - Graco GM 3000 Instructions Manual

Installing the pump
1. Mount the pump on the drive housing. Tap it into
the alignment pins with a soft hammer. Tighten the
screws (17) to 50 ft-lb (68 N.m).
WARNING
MOVING PARTS HAZARD
Be sure the retaining spring (12) is firmly
in the groove all the way around, to
prevent the pin (11) from working loose
due to vibration. See Fig. 9.
If the pin works loose, it or other parts could break
off due to the force of the pump action. These parts
could be projected into the air and result in serious
injury or property damage, including the pump
connecting rod or drive housing.
2. Align the hole in the rod (107) with the connecting
rod assembly (10). Use a screwdriver to push the
retaining spring (12) up and push in the pin (11).
Push the retaining spring (12) into place around
the connecting rod.
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 install or clean the spray tip.
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
8
308660
Displacement Pump
(See Fig. 8 and 9.)

Pressure Relief

Graco Headquarters: Minneapolis
International Offices: Belgium, Korea, China, Japan
3/1996, Rev 8/2006
3. Tighten the packing nut (102) just enough to stop
leakage, but no tighter. Fill the packing nut/wet-cup
1/3 full with Graco TSL. Push the plug (123) into
the wet-cup.
10
123
Torque to
1
50 ft–lb (68 N.m)
Fig. 9
Pressure Relief Procedure
1. Engage the gun safety latch.
2. Turn the engine switch to OFF.
3. Move the pressure control ON/OFF switch to OFF.
4. Disengage the gun safety latch. Hold a metal part
of the gun firmly to a grounded metal pail. Trigger
the gun to relieve pressure.
5. Engage the gun safety latch.
6. Open the pressure drain valve. Leave the pressure
drain 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.
www.Graco.com
11
12
102
17
1
06008