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14 GC-1388F
To relieve uid and air pressures:
1. Push down Yellow slide valve, P/N 21402-00 to bleed
off air to system.
2. Open P/N 21228-00 on catalyst pump to recirculation
position.
3. Open P/N 21192-00 on bottom of material pump.
4. Verify the Trigger Lock is in the Locked position.
Daily Maintenance
It is recommended that the following service be per-
formed on a daily basis.
1. The Gun is built at the factory with, P/N 21222-00
Lubricate. This is a water soluble lubricate, not
affected by most solvents. When maintaining the
Gun, it is recommended that this is used as outlined
on “Lubricate Page”. Clean the Gun using a brush
and a appropriate clean solvent.
2. Inspect Gun Valve Needle shafts, making certain
they are clean and free of over-spray or foreign-
material. Clean and lubricate as required.
3. Inspect the Gun Packings, Needles and Seats for
catalyst or material leakage. If leakage does occur,
correct at once! If material leaks (or drips) out of the
nose of the gun, this indicates that there is a bad needle
/seat condition. If material leaks out of the back of the
needle stem, this indicates loose or worn packings
and may be repacked by tightening the packing nuts,
P/N 20509-00 1/8 turn each until leak stops. Test trigger
to verify spring can return needle to seat.
4. Maintain a reasonable stock level of “wear” items
such as Packings, Seals and O-Rings
5. If dispense gun is leak tested, be sure to dry gun
thoroughly.
6. Never leave dispense gun immersed in any liquid.
Pressure Relief Procedure