SAST0922
Page
13
Parts Replacement
General Information
Familiarise yourself with the parts replacement
procedures and component parts thoroughly before
attempting any repair.
Insure that the unit is in the bypass position and
relieve the system pressure before attempting any
repair procedure.
Required Tools
The following tools are required to perform routine
maintenance on this valve:
Phillips Screwdriver
Needle Nose Pliers
Adjustable Wrench
Small Standard Screwdriver
Timer Assembly Replacement
1. Place the bypass valve into "bypass" position.
2. Relieve the system pressure.
3. Remove the four (4) head mounting screws.
4. Lift the timer assembly away from the valve
body.
5. Follow these steps in reverse to reinstall the
timer assembly.
Note: Prior to re-instalment insure that the
main return spring is centred over the main
diaphragm.
Main Diaphragm Replacement
1. Place the bypass valve into the "bypass"
position.
2. Relieve the system pressure. Remove the four
(4) head mounting screws.
3. Lift the timer assembly away from the valve
body.
4. Remove the c-clip from the centre of the
diaphragm.
5. Lift the diaphragm away from the body stem
assembly.
6. Follow these steps in reverse to reinstall the
timer assembly.
Note: Prior to re-instalment insure that the
main return spring is centred over the main
diaphragm and that the outside edges of the
main diaphragm are tucked into the valve
body.
Rinse Adjustment Valve Replacement
1. Place the bypass valve into "bypass"
position.
2. Relieve the system pressure. Remove the
four (4) head mounting screws.
3. Lift the timer assembly away from the valve
body.
4. Remove the c-clip from the centre of the
diaphragm.
5. Lift the diaphragm away from the body stem
assembly.
6. Remove the seat assembly.
7. Disconnect the large c-clip located on top of
the rinse adjustment valve.
8. Press the rinse adjustment valve down and
out through the valve body assembly.
9. Inspect the o-rings on the valve for wear.
Clan or replace the valve assembly if
necessary.
10. Lightly lubricate the o-rings with a Dow 111
Silicone based lubricant.
11. Follow these steps in reverse to re-install the
rinse adjustment valve.
Drain Seat Replacement
1. Place the bypass valve into the "bypass"
position.
2. Relieve the system pressure.
3. Disconnect the drain fitting from the control
valve drain outlet.
4. Use a large standard screwdriver to remove
the drain seat. Turn out counterclockwise.
5. Prior to installing the drain seat, lubricate the
o-ring(s) with dish soap.
6. Turn in the drain seat, until the fitting
becomes bottoms out.
7. To properly align the drain seat with the drain
paddle back out seat four (4) full turns.
8. Pressurise the system and check drain for
leaks.
Note: After backing out the drain seat the
seat may still require minor adjustment to
eliminate leaks. Turn the seat in or out
until the leak to drain stops.
Summary of Contents for SAST0922
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