Operation
WARNING
To reduce the risk of serious injury, whenever the
valve is not in use, engage the trigger safety by
turning the safety knob (22) clockwise all the way.
Flow Rate Adjustment
To dispense material, squeeze the trigger (15) all the
way. Flow begins with the slightest pressure and
continues until the trigger is released.
Adjust the pump to the minimum speed necessary to
deliver the material at a satisfactory rate.
If desired, further adjustment of the flow rate may be
obtained by turning the hex portion of the safety as-
sembly in or out.
Lubrication and Care
Keep the valve clean, and oil the exposed portion of
the valve stem with a light, high grade machine oil
daily.
Service
Valve Seat and Stem Replacement
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5.
If flow continues after the trigger (15) is released, it
may be due to poor adjustment, obstructions, or worn
or damaged parts.
For proper adjustment, there should be from 0.12 in. to
0.31 in. (3.2 to 7.9 mm) handle end play. To adjust,
remove the safety assembly (22) and squeeze the
handle to move the adjusting nut out of the housing.
Loosen the cap screw in the adjusting nut and unscrew
the nut a few turns. Push the valve stem in so its tip is
against the seat and adjust the nut in or out until there
is 0.12 in. to 0.31 in. (3.2 to 7.9 mm) handle end play.
Move the nut out of the housing, tighten the cap screw,
and reinstall the parts in the housing.
CAUTION
The hard carbide portion of the seat and stem is easily
damaged. Take care not to damage this part of the
valve.
To remove an obstruction or repair the valve, relieve
the pressure and disconnect the hose. Disassemble,
clean and inspect the parts. Replace any worn or
damaged parts and reassemble. Adjust the handle end
play as explained at left.
Valve Stem Packing Replacement.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5.
Material leaking past the packings may be due to a
loose packing screw (14) or to worn or damaged
packings (10*
{
) or stem (20*
{
). Remove the handle
and tighten the packing screw. If the leak continues,
relieve the pressure, disconnect the hose, and disas-
semble the gun. Replace parts as necessary and
reassemble the gun.
