HP GRACO OR PRO TI1681A - Manual (Page 50)

Repair
50 309293J
Fluid Adjustment Valve Repair
1. Prepare the gun for service, page 41.
2. Remove the fluid adjustment valve (25). It can only
be replaced as a complete assembly. See F
IG . 32..
3. Screw the valve (25) into the gun handle. Torque to
15-25 in-lb (1.7-2.8 N•m).
Fig. 32. Fluid Adjustment Valve
Air Valve Repair
1. Prepare the gun for service, page 41.
2. Remove the barrel, page 46.
3. Remove the fluid adjustment valve (25) from the
handle (17). Remove the spring (15). See F
IG . 33..
4. Remove the air valve (21 ) with a pliers. Inspect the
seal (21a*) and replace if damaged. Be sure the
seal is pressed securely onto the valve so the outer
cone is flats.
5. Inspect the u-cup (6*). Do not remove the u-cup
unless damaged. If removed, install the new one
with its lips facing into the gun handle (17).
6. Install the air valve (21) and spring (15) into the gun
handle (17).
7. Install the fluid adjustment valve (25). Torque to
15-25 in-lb (1.7-2.8 N•m).
8. Install the barrel, page 46.
Fig. 33. Air Valve
CAUTION
Clean all parts in non-conductive solvent compatible
with the fluid being used, such as xylol or mineral
spirits. Use of conductive solvents can cause the gun
to malfunction.
TI1684A
25
CAUTION
When removing the air valve (21) be careful not to
damage the seat area.
TI1685A
25
15
21
*6
17
21a*