All Models; Air-Powered Models - Graco Check-Mate 2100 A Series Instructions-Parts List Manual

(ALL MODELS)

Pressure Relief Procedure
WARNING
SKIN INJECTION HAZARD
Fluid under high pressure can be in-
jected 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/dispensing,
D check or service any of the system equipment,
D or install or clean the spray tip/nozzle.
1. Engage the gun/valve trigger safety.
2. Shut off the air or hydraulic supply to the pump.
3. In air-powered systems, close the bleed-type
master air valve (required in your system). In
hydraulic-powered systems, close the hydraulic
supply line valve first, then the return line valve.
4. Unlock the gun/valve safety latch.
5. Hold a metal part of the gun/valve firmly to the side
of a grounded metal pail, and trigger the gun/valve
to relieve pressure.
6. Lock the gun/valve safety latch.
7. Open the drain valve (required in your system)
and/or the pump bleeder valve, having a container
ready to catch the drainage.
8. Leave the drain valve open until you are ready to
spray/dispense again.
If you suspect that the spray tip/nozzle 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, nozzle, or hose end
coupling and relieve pressure gradually, then loosen
completely. Now clear the tip/nozzle or hose.
Packing Nut/Wet-Cup
Fill the packing nut/wet-cup (2) 1/3 full with Graco
Throat Seal Liquid (TSL) or compatible solvent. See
Fig. 5. Using the supplied wrench (104), adjust the
packing nut weekly so it is just snug; do not overtigh-
ten. Follow the Pressure Relief Procedure above
before adjusting the packing nut.
12 308149
Operation
Flushing the Pump
The pump is tested with lightweight oil, which is left in
to protect the pump parts. If the fluid you are using
may be contaminated by the oil, flush it out with a
compatible solvent before using the pump.
Before operating the pump, ground the system as
explained under FIRE AND EXPLOSION HAZARD
and Grounding on page 5.
Starting and Adjusting the Pump
Supply fluid to the pump, per the requirements of your
system.
Refer to Fig. 3 on page 8. Be sure the air regulator
(F) is closed. Then open the pump's bleed-type master
air valve (E). Hold a metal part of the spray gun/dis-
pensing valve (S) firmly to the side of a grounded
metal pail and hold the trigger open. Now slowly open
the air regulator until the pump starts.
Cycle the pump slowly until all the air is pushed out
and the pump and hoses are fully primed. Release the
spray gun/dispensing valve trigger and engage the
safety latch. The pump should stall against pressure
when the trigger is released.
If the pump fails to prime properly, open the bleeder
valve plug (35) slightly. Use the bleed hole, on the
underside of the valve body (34), as a priming valve
until the fluid appears at the hole. See Fig. 5. Close the
plug (35).
NOTE: When changing fluid containers with the hose
and gun already primed, open the bleeder valve plug
(35), to assist in priming the pump and venting air
before it enters the hose. Close the bleeder valve
when all air has been eliminated.
To reduce the risk of fluid injection, do not use your
hand or fingers to cover the bleed hole when
priming the pump.
WARNING

(AIR-POWERED MODELS)

WARNING