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Troubleshooting
NOTE: Check all possible remedies in the trou-
bleshooting charts before disassembling the
gun.
General Troubleshooting
Problem
Fluid leakage through venting
holes.
Air leakage through venting hole. Worn o-ring (9) or gasket (15).
Air leakage from back of gun.
Air does not trigger.
Air does not shut off.
Fluid leakage from front of gun.
Fluid is present at air cap holes.
313516F
Some improper patterns are caused by the
improper balance between air and fluid. Refer
to Spray Pattern Troubleshooting, page 22.
Cause
Worn packing (17) or needle (5).
Worn o-rings (8, 9).
Piston stem is disconnected from
main body of piston assembly (3).
Cylinder air pressure is too low.
Piston assembly not seating
properly.
Broken return spring (7).
Swollen o-ring (8).
Worn piston stem o-rings (10, 11).
Bottom gasket (12) failed.
Fluid needle tip (5a) is dirty, worn,
or damaged.
Dirty or worn nozzle (23).
Nozzle (23) is insufficiently tight-
ened or sealing o-ring (36) is dam-
aged.
Troubleshooting
Solution
Replace packing or needle.
Check and replace parts as
needed.
Replace o-rings.
Replace piston assembly.
Increase cylinder air pressure to
50 psi.
Clean/service piston assembly.
Replace worn or swollen o-rings.
Replace return spring.
Replace o-rings.
Replace o-rings.
Replace gasket.
Clean or replace fluid needle tip or
entire needle (5).
Clean or replace nozzle.
Tighten or replace o-ring.
21
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