Graco Inc. 288896 ユーザーズマニュアル

1. Flush and clean gun before servicing.

2. Follow Pressure Relief Procedure,

1. Unscrew air cap (1).

2. Trigger gun while you remove the 

nozzle (2) with gun tool (27).

3. Remove fluid adjustment knob (8-2) and 

spring (9).

4. Pull fluid needle (10) out the back of the 

gun.

1. Remove retaining rings (15), pin (16), and 

trigger (17).

2. Remove packing nut (4) and fluid needle 

packings (3-1, 3-2).

3. Remove fluid needle guide (7).

4. Remove fluid adjusting guide (8-1).

5. Remove spring (18) and air valve (19).

6. Remove air valve seat (20) and o-rings. 

7. Replace parts as needed.

8. Assemble gun in reverse order. Lubricate 

needle and o-rings. Be sure to trigger gun 
when installing nozzle (2).

Fluid leaking from 
packing nut (4).

a. Packing nut (4) loose.

a. Tighten, but not so tight as to grip

needle.

b. Packing (3-1, 3-2) worn or 

dry.

b. Lubricate or replace.

Fluid nozzle (2)
dripping.

a. Dry packing (3-1, 3-2).

a. Lubricate.

b. Sluggish needle (10).

b. Clean and lubricate.

c. Packing nut (4) too tight.

c. Loosen.

d. Worn fluid nozzle or 

needle.

d. Replace.

Thin, coarse finish.

a. Gun held too far from 

surface.

a. Hold gun about 6 to 8 inches 

(150 to 200 mm) from surface.

b. Atomization air pressure 

set too high.

b. Reduce air pressure.

Thick, dimpled finish 
(resembling orange 
peel).

Gun held too close to surface. Hold gun about 6 to 8 inches 

(150 to 200 mm) from surface.

Trigger gun and use gun tool (27) when-
ever you tighten or remove the nozzle (2) 
to avoid damage.