Troubleshooting - Graco Fusion A Series Instructions Manual

Troubleshooting

Troubleshooting
To prevent cross-contamination in the gun, do not
interchange A component (isocyanate) and B
component (resin) parts. Cross-contamination can
result in cured material in the gun. Cured material may
damage the sealing surfaces, block fluid passages,
and prevent gun function.
Problem
Gun does not fully actuate when
triggered
Fluid does not spray when the gun is
fully actuated
Gun actuates slowly
32
NOTICE
The safety lock is engaged.
The muffler (22) is plugged.
The air valve o-rings (24) are
damaged.
Cured material is inside the cartridge
(18).
The retaining ring (9) is not bottomed
out.
The fluid valves (12b) are closed.
The impingement ports are plugged. Clean the impingement ports. See
The check valves (26) are plugged.
The cartridge (18) is plugged.
The muffler (22) is plugged.
The piston o-rings (16, 17) are
damaged.
The air valve is dirty, or the o-rings
(24) are damaged.
1. Follow the Pressure Relief Procedure, page 19,
before checking or servicing the gun.
2. Check all possible problems and causes before
disassembling the gun.
Cause
Disengage safety lock.See Piston
Safety Lock, page 20.
Clean the muffler. See Clean
Muffler, page 28.
Replace the air valve o-rings. See
Inspect the Air Valve, page 29.
mix chamber (19) for scratches. See
Inspect the Fluid Cartridge, page
26. Replace.
Tighten retaining ring until bottomed
out.
Open the fluid valves.
Clean Mix Chamber Impingement
Ports, page 24.
Clean the check valves. See Inspect
the Check Valves, page 23.
Remove the Fluid Cartridge, page
page 24, then Test Fluid Cartridge
Restriction, page page 26.
Clean the muffler. See Clean
Muffler, page 28.
Replace the piston o-rings. See
Parts, page 35.
Clean air valve or replace o-rings.
See Inspect the Air Valve, page 29.
Solution
Inspect the fluid cartridge (18) and
3A7314B