Versa-Matic 3 Clamped Metallic Ball Valve Pumps (RE3) - Manual (Page 25)

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Model RE3 Metallic Clamped •
22
airVantage Servicing - Sensor assembly
To service the control module, first shut off and bleed the air
being supplied to the pump. For safety purposes the air supply
line should be disconnected from the pump. Then shut off the
suction and discharge lines to the pump. Bleed the pressure
from the pump suction and discharge lines and remove the
lines from the pump. During the servicing of the AirVantage,
consult the “AirVantage Composite Repair Parts Drawing”.
Step #1: Remove the Patch Cable
Twist the ribbed portion of the patch cable connector in
a counterclockwise direction, until it unthreads from the
connector. The cable can either be removed from the
intermediate or from the control module.
Step #2: Remove the AirVantage from the Pump
Use a ½” socket and remove the four 5/16-18 x 5 1/2 cap
screws that hold the AirVantage to the pump. Remove the two
chamber bolts/nuts that are holding the right side bracket to be
able to remove the right bracket and AirVantage unit from the
pump. Be sure to support the weight of the AirVantage while
removing the last cap screw. After the AirVantage is removed
from the pump, set the unit down on the plastic cover located
on the bottom.
Step #3: Diaphragm Disassembly
Refer to exploded views for disassembly.
“AirVantage CAUTION” – When the diaphragm assembly
is removed, watch for the brass probe tips located on the
end of the sensor rod. There is one brass probe tip and
one o-ring per side. Inspect the probe tips and o-rings for
wear. Every time the diaphragm is serviced, these parts
should be replaced and are available in kit form. Consult
the “Composite Repair Parts Drawing” for part numbers
and quantities.
Step #4: Accessing the Sensor Assembly
Use a 9/64" hex key wrench to remove the 4 socket head cap
screws from the sensor connector plate. Use a 13/16" socket
and remove the plastic nut securing the connector to the
connector plate. Remove the connector from the connector
plate taking care not to lose/misplace the gasket on the
connector or the o-ring that seals the connector plate. Next,
use a 9/64" hex key wrench to remove the 2 socket head cap
screws on each sensor end cap. Use a small flat screwdriver
to gently pry the end caps from the inner chambers.
Now slide the sensor out of the intermediate while feeding the
connector and cable into the intermediate. Slide the Connector
end of the cable out of the same opening as the sensor.
Step #5: Reinstallation
Note the orientation of the sensor rod with respect to the pilot
shaft location. The sensor rod side of the sensor should be
on the "top" side of the pump (facing the air valve side of
the pump). Slide the Connector end of the cable and then
the sensor into the sensor opening. Feed the connector out
through the opening in the intermediate. Ensure the gasket
is on the connector and the connector plate o-ring is in the
connector plate o-ring groove. Insert the connector into the
connector plate. Use a 13/16" socket to install the plastic nut
in order to secure the connector to the connector plate. Use a
9/64" hex key wrench to install the 4 socket head cap screws
and secure the sensor connector plate to the intermediate.
Install the sensor end caps. Be sure not to pinch or cut the
sensor o-rings. Use a small amount of lubrication if necessary
to ease assembly. Use a 9/64" hex key wrench to install the 2
socket head cap screws on each sensor end cap to secure the
sensor.
Refer to the “Diaphragm Servicing” section of the manual to
finish the diaphragm installation procedure.
Note: Refer to Composite Repair Parts
List on page 23 for part numbers