Graco 311001G Manual De Usuario

Follow Pressure Relief Procedure on page 10. 
Read warnings, page 4.

•

Check all possible remedies in the trouble-
shooting charts before disassembling the gun.

•

Some improper patterns are caused by the 
improper balance between air and fluid.

Fluid leakage from back of fluid 
packing area.

Worn packings or needle shaft.

Replace needle assembly (2).

Air leakage from gun.

Air valve not seating properly.

Clean or replace air valve (8).

Fluid leakage from front of gun.

Needle ball worn or damaged.

Replace needle assembly (2) and seat (5c).

Worn seat assembly.

Replace the seat (5c) and gasket (5b, carbide 
models only). The gasket must be replaced 
whenever the seat assembly is removed.

Do not reverse the direction of the plastic seat 
(5c, model 288844 gun only) if it is worn. The 
seat must be replaced it if is worn.

Fluid viscosity too low for proper 
seal with carbide seat.

Install plastic seat (5c).

Fluid in air passages.

Spray tip seal leaking.

Tighten retaining ring (6) or replace spray tip 
(33).

Leaking around seat housing.

Replace the gasket (5b, carbide models only). 
The gasket must be replaced whenever the 
seat assembly is removed.

Fluid inlet fitting leaking.

Replace the fluid tube gasket (22). The gas-
ket must be replaced whenever the fluid tube 
connector is removed.

Slow fluid shut-off.

Fluid buildup on fluid needle 
components.

Remove and clean or replace the fluid needle 
assembly (2).

No fluid output when triggered.

Spray tip plugged.

Clean spray tip. See page 14.

Fluid filter or fluid hose plugged.

After tip removal (see above), very slowly 
loosen the hose end coupling at the gun and 
relieve pressure gradually. Then loosen com-
pletely to clear the obstruction. Clean or 
replace filter (12).