AEC VacTrac Series Conveying Systems - Manual (Page 91)

VacTrac™ Series Conveying Systems Page 91
Mechanical Components WH2-605A.4
3. Remove the cotter pin from the plunger. Unscrew the
plunger from the air cylinder shaft.
4. Remove the four (4) socket cap screws holding the air
cylinder to the end plate. Separate the cylinder and the end
plate.
Servicing and Reassembling Upper Valves
1. Clamp the air cylinder in a vise and unscrew the end cap.
Using parts from the valve service kit, replace the seals in
the air cylinder. Screw the end cap back on.
2. Secure the air cylinder to the end plate using the four (4)
socket cap screws.
3. Screw a new plunger on the air cylinder shaft; secure it
with the cotter pin.
4. Place a new gasket on the end plate; secure the end plate.
5. Reattach the upper cap to the air cylinder using two (2)
socket cap screws.
Reinstalling Upper Valves
1. Replace the O-rings in the machined body.
2. Position the valve on the blower inlet, making sure the
valve seats properly. Tighten the set screws that secure the
valve to the blower inlet.
3. Reconnect the valve inlet to the incoming vacuum line and
the lower valve with the hose. Tighten the clamps.
4. Reconnect the compressed air line to the vacuum relief
regulator.
Maintaining Lower Valves
Removing Lower Valves
1. Turn off and lock out the power switch for the vacuum
power unit. Disconnect and lock out the power main to the
unit; make sure to follow applicable safety regulations.
2. Turn off compressed air. Disconnect the copper
compressed air line to the lower valve at the lower valve
body.