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INJECTION AND HOT MATERIAL HAZARDS
To reduce the risk of serious injury from fluid injection or contact with hot material:
Lock the piston rod safety whenever you stop dispensing.
Close the fluid manifold needle valves completely with the nut driver provided before servicing the gun; this
will isolate the fluid pressure in the manifold and fluid hose.
If service or maintenance requires removing the gun from the production line, follow the procedure on page
18 to remove the gun.
PROBLEM
Air leaks:
1. Between gun body and cover,
when gun is triggered or not
triggered
2. Between gun body and cover,
when gun is triggered
3. Through exhaust holes:
a. When gun is not triggered
b. When gun is triggered or not
triggered
c. When gun is triggered
4. Through safety lock area, when
gun is triggered
Fluid leaks:
1. Between nozzle & needle, hous-
ing or packing
2. Between nozzle & housing
Gun operates slowly when it is
triggered
Troubleshooting
WARNING
CAUSE
1. O-ring (29) is missing or damaged
2. O-ring (43) is missing or damaged
3.
a. Solenoid (2f) failed
Rear spool o-ring (7b) failed
Front piston separator o-ring (32)
failed
b. Middle spool o-ring (7b) failed
Front piston o-ring (33) failed
c. Rear piston separator o-ring (32)
failed
Front spool o-ring (7b) failed
4. Gun body o-ring (25) and back-up
ring (24) failed
1. Worn nozzle or seals
2. Foam buildup on nozzle sealing
surfaces in nozzle head (4)
1. Inbound air pressure is too low
2. Air valve is leaking air
3. Needle sticking due to foam buildup
as nozzle wears
4. Air valve spool or piston o-rings dry,
causing drag
SOLUTION
1. Install or replace o-ring. See Parts,
page 32.
2. Install or replace o-ring. See Parts,
page 32.
3.
a. Replace solenoid. See page 20.
Lubricate or replace o-ring.
See page 25.
Lubricate or replace o-ring.
See page 22.
b. Lubricate or replace o-ring.
See page 25.
Lubricate or replace o-ring.
See page 22.
c. Lubricate or replace o-ring.
See page 22.
Lubricate or replace o-ring.
See page 25.
4. Lubricate or replace o-ring and back-
up ring. See page 22.
1. Repair or replace needle/nozzle
assembly (5). See page 10.
2. Clean or replace nozzle head.
See page 10.
1. Increase air pressure, but do not
exceed 180 psi (12 bar) Maximum
Working Air Pressure.
2. See Air leaks section, above.
3. Repair or replace needle/nozzle
assembly (5). See page 10.
4. Lubricate or replace o-rings. See
pages 22 and 25.
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