HP 288048 - Manual (Page 14)

Troubleshooting
14 311053C
Troubleshooting
General Troubleshooting
Check all possible remedies in the troubleshooting
charts before disassembling the gun.
Some improper patterns are caused by the
improper balance between air and fluid. Refer to
Spray Pattern Troubleshooting, page 16.
Problem Cause Solution
Fluid leakage through venting holes. Worn o-rings or packings on needle
assembly (12). Replace o-rings or needle assembly.
Air leakage through venting hole. Worn o-ring (23). Check and replace as needed.
Air leakage from back of gun. Worn o-rings (22, 23). Replace o-rings.
Fluid leakage from front of gun. Fluid needle (12) is dirty, worn, or
damaged
Dirty or worn seat (10, 41).
Spray tip seal is leaking.
Seat (10, 41) is insufficiently tight-
ened or gasket (11) is missing or
worn from multiple uses.
Clean or replace fluid needle.
Clean or replace the seat (10, 41)
and gasket (11). The gasket must be
replaced whenever you remove the
seat from the gun.
Tighten nut (7) or replace spray tip
gasket (8).
Tighten seat (10, 41) and replace
gasket (11). The gasket must be
replaced whenever you remove the
seat from the gun.