Table 3-2. Operator Troubleshooting
TEST OR INSPECTION
1. NOZZLE PRESSURE GREATER THAN 100 PSI
Figure 3-3. Nozzle Assembly
Step 1. Check nozzle assembly for blocking or plugging.
Do not use hard metal objects or probes to unplug air cap holes. Use a soft material like a
a. Unscrew the knurled ring and remove the air cap.
(1) If the air cap holes are partially or completely plugged or coated with oil residue,
soak the fluid nozzle in acetone (O-A-51F) to clean it.
(2) Carefully dean out the air cap holes with a toothpick or other non-metallic object.
(3) Wipe the air cap, the exposed fluid nozzle surfaces and the fluid hole projection
with a clean rag. Go to step 1b.
(4) If the air cap is not plugged, go to step 1b.
b. Remove the fluid nozzle and check the air holes.
(1) If the air holes are plugged, or coated with oil residue, soak the fluid nozzle in
acetone (O-A-51F) to dissolve the gunk and varnish.