5
OPERATION
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including
fluid splashing in the eyes or on the skin, or injury
from moving parts, always follow this procedure
whenever you shut off the pump, when checking or
servicing any part of the dispensing system, when
installing, cleaning or changing nozzles, and when-
ever you stop dispensing.
1. Shut off the dispensing valve.
2. Shut of f the bleed–type master air valve (re-
quired in your system), on the main air line.
3. Close the bleed–type master air valve (supplied
with your pump).
4. Trigger the dispensing valve to relieve pressure.
If you suspect that the dispensing valve, nozzle or
hose is completely clogged, or that pressure has not
been fully relieved after following the steps above,
VERY SLOWLY open the pump bleeder valve, hav-
ing a container ready to catch the drainage. Leave
the pump bleeder valve open until you are ready to
dispense again. VER Y SLOWLY loosen the hose
end coupling and relieve pressure gradually , then
loosen completely. Now clear the nozzle or hose.
WARNING
Keep hands and fingers away from the priming pis-
ton and pump intake during operation and whenever
the pump is charged with air. During operation, the
priming piston extends beyond the intake housing to
pull material into the pump, and can severely injure
or amputate a hand or finger caught between it and
the intake housing. Always follow the
Pressure Re-
lief Procedure W arning
above before checking,
clearing, cleaning, flushing or servicing any part of
the pump.
The air motor piston and fluid piston (located inside
the air motor cylinder and coupling) also move when
air is supplied to the motor. Do not place your hand
or fingers into the air motor coupling cavity while the
pump is operating.
As the ram is raised and lowered, the wiper plate,
ram tubes, and pump mounting bracket move. T o
reduce the risk of pinching or amputation of fingers,
keep your hands away from the wiper plate, lip of the
fluid can, pump bracket and ram tubes while the
pump is operating.
To reduce the risk of serious injury and damage to
equipment, DO NOT shut of f the air supply to the
ram when the ram is raised. Doing so will cause the
pump to fall uncontrolled to the bottom.
WARNING
Starting and Adjusting the Ram
1. Refer to Fig 1. Be sure all air regulators and bleed–
type air valves are closed.
2. Open the air valve in the main air line and set the ram
air regulator (227b) to 2 bar (28 psi). Set the ram di-
rector valve switch (236) to the UP position and let
the ram rise to its full height. To change the speed at
which the ram raises and lowers, adjust the air regu-
lator to increase or decrease the air volume.
3. Check that the fluid can is not dented or out of shape,
which will damage the wiper plate and cause leakage
around the wiper. Cut off the top of the fluid can with
the can opener, or remove the bottom of the can. Be
sure that the edge is free of burrs, which will damage
the wiper plate. If necessary , bend the edge back
with a pliers so the wiper plate will enter the can easi-
ly. Lubricate the wiper ring (305) to help the plate en-
ter the can easily.
4. Set a full can of fluid on the ram base, centering it un-
der the wiper plate (300).
5. Loosen the wiper plate bleed valve (303) enough to
allow air trapped under the wiper plate to escape.
With your hands away from the lip of the can and the
wiper plate, set the director valve switch (236) to the
DOWN position and lower the ram until the wiper
plate enters the can. Reduce the air pressure when
the plate enters the can.
NOTE:
If the wiper plate does not enter the can easily ,
increase the ram pressure; once it enters the
can, immediately reduce the pressure.
6. Continue to lower the ram until fluid appears at the
wiper plate vent hole. Tighten the wiper plate bleed
valve (303) securely. See Fig 1.
7. Clamp the can in place with the clamps (224) and
wing screws (239), being sure the clamp catches the
lip of the can.
Priming the Pump and Pumping Fluid
1. Be sure the pump air regulator (227a) is closed. Then
set the ram air regulator (227b) to about 1.5 bar (22
psi). Set the director valve switch (236) to DOWN.
2. Open the bleed–type master air valve (208). Set the
pump air regulator (227a) to 2.0 bar (28 psi).
3. Open the pump bleeder valve (125) to allow air to
bleed from the pump. When the pump is fully primed,
close the valve.
4. Keep the director valve switch (236) in the DOWN
position while the pump is operating.
NOTE:
Adjust the air pressure to the ram as needed, but
DO NOT increase it to a level where fluid is
forced past the wiper plate.
Changing Fluid Cans
1. Stop the pump. Close the bleed–type master air
valve (208), but leave air pressure on to the ram.
Open the dispensing valve and relieve all fluid pres-
sure in the system.
2. Set the director valve switch (236) to UP.
3. Push in the air assist valve (218) and hold it in until
the wiper plate clears the top of the can.
4. Loosen the clamps (224) and remove the empty can.
Set the full can on the ram base and position it under
the wiper plate.
5. Lower the ram and adjust the position of the can rela-
tive to the wiper plate, as explained under
“Starting
and Adjusting the Ram”.
Clamp the can in place.
