Graco 3A2894F - ExactaBlend AGP Advanced Glazing Proportioner Manual De Usuario

1.

Follow Pressure Relief Procedure, page 46, before checking or repairing a dispense valve.

2.

Check all possible problems and causes before disassembling the dispense valve.

No flow of catalyst (B).

Clogged gun nose.

Clean or replace the gun nose.

Clogged injector housing (Ultra-lite 
only).

Clean or replace the injector housing.

Clogged restrictor housing

Clean or replace the restrictor housing 
and pin.

Ball valve is closed.

Open the ball valve.

V/P is off.

Ensure the power is on.

Ensure the machine is in dispense 
mode.

Ensure V/P is turned on when machine 
enters Purge/Prime mode.

No air to catalyst (B) pump.

Turn air on.

No catalyst ram down pressure.

Ensure that there is pressure to the 
catalyst ram and that the control lever 
is in the down position.

Dosing valve leaking at rod.

Loose or worn packings.

Tighten packing nut. If leak continues, 
replace the packings.

Dosing valve between main 
housing and outlet housing.

Bad o-ring.

Replace both o-rings on the seat.

Dosing valve not cycling

Bad cable.

Replace the cable.

Bad power valve.

Replace the power valve.

Dispense valve will not dispense 
material.

Trigger lock engaged.

Disengage the trigger lock.

No air to MD2.

Connect air to the MD2.

Turn on the air.

Clogged mixer.

Clean or replace Tri-core or Flex mixer.

Ultra-lite has cured material in it.

Clean or replace.

Dispense valve will not stop 
material dispense.

No air to MD2.

Connect air to the MD2.

Turn on the air.

Bad seal in MD2.

Repair the MD2. Refer to the MD2 for 
more details

Ultra-lite seal is worn

Replace the seal.