Graco M2K 17D763, Instructions - Parts Manual

Operation 

8

334625B

Manifold Functional Operation

See F

IG

. 3

Spray Position

•

Common handle down “Spray Position”

•

Solvent flush “A” closed

•

“Solvent flush “B” closed

A and B material flows through A and B valves into mix-
ing chamber. A and B stay separate until exiting the mix 
chamber.

Flush “B” Position

•

Common handle up “Stand-by Position”

•

Solvent flush “A” closed

•

“Solvent flush “B” open

Solvent flows through the solvent flush “B” check into 
catalyst fluid passage. Then through catalyst B check 
through ID of catalyst tube into mix chamber and out of 
the manifold outlet port.

Flush “A” Position

•

Common handle up “Stand-by Position”

•

Solvent flush “A” open

•

“Solvent flush “B” closed

Solvent flows through the solvent flush “A” check into 
resin fluid passage. Then through resin A check into the 
mix chamber around catalyst tube to manifold outlet 
port.

Pressure Relief Procedure

Follow the Pressure Relief Procedure whenever 
you see this symbol.

1.

Engage the gun trigger lock, if present. 

2.

Turn off the bleed-type master air valve and air to 
supply pumps, if present.

3.

Disengage the gun trigger lock, if present.

4.

Hold a metal part of the gun firmly to a grounded 
metal waste container. Trigger the gun to relieve 
fluid pressure.

5.

Engage the trigger lock, if present.

6.

Open all fluid drain valves in the system, having a 
waste container ready to catch the drainage. Leave 
the drain valve(s) open until you are ready to spray 
again.

7.

If you suspect that pressure has not been fully 
relieved after following the steps above, check the 
following:

a.

The spray tip may be completely clogged. Very 
slowly loosen the air cap retaining ring to relieve 
pressure in the cavity between the ball/seat 
shutoff and the plugged tip. Clear the tip orifice.

b.

The gun fluid filter or the fluid hose may be com-
pletely clogged. Very slowly loosen the hose 
end coupling at the gun and relieve pressure 
gradually. Then loosen completely to clear the 
obstruction.

c.

After following the steps above, if the spray tip 
or hose still seems completely clogged, very 
slowly loosen the tip guard retaining nut or hose 
end coupling and relieve pressure gradually, 
then loosen completely. With tip removed, trig-
ger gun into waste container.

F

IG

. 3 Fluid flow through the manifold

A Side

B Side

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 spraying and before 
cleaning, checking, or servicing the equipment.