Graco 800N Instructions Manual page 11

Problem
Fluid packing nut leaking.
Air leakage from front of gun.
Fluid leakage from front of gun.
Troubleshooting
Cause
Loose needle packing nut (9).
Worn needle packings (10).
Air valve (12, 13) not seating properly.
Needle (1) worn or damaged.
Worn needle and nozzle seat in fluid
nozzle (2).
Needle packings (10) too tight.
Solution
Tighten.
Replace.
Clean, service.
Replace.
Replace fluid nozzle and needle.
Lubricate packings (10) and adjust
packing nut (9).
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