Bradley AST4 Operation And Service Manual

Metering Air Valve

The air valve timer is located next to the tube connector on the
air valve body. The timer is capped with a filter to prevent dirt
build-up on the timer. The air valve timing can be adjusted from
5–60 seconds.

Adjust Air Valve Meter Time

1

Operation and Service Guide: Ablution

P.O. Box 309 • Menomonee Falls, WI 53052-0309

1.800.BRADLEY • Fax: [phone] • bradleycorp.com

Water Tube

Connector

Remove filter cap and use a screwdriver to tighten or
loosen the timer (see illustration at right). Turning the

A

timer clockwise increases the time; turning the timer
counterclockwise decreases the time.

Continue to adjust until the timer is set at desired

B

length.

Replace filter cap over the timer.

C

Air

Valve

Filter

Cap

Air Tube

Connector

Tempered Line Adapter Option
Part no. S39-804

(replaces S59-4000 if tempered line
is used)

Strainer

(173-028)

Tube Connection Leaks

2

Push in the orange manual release button while
pulling the tube out (see illustration at right) to

A

disconnect the tube at the connector. No tools are
needed.

To correct a leak, press tubing firmly into the
connector and make sure it is seated.

B

If leak persists, remove tubing from the fitting, and
trim the tubing end square with a razor-sharp knife.

C

If leak continues, replace the fitting or contact your
Bradley representative for assistance.

1 of 3 Bradley • 215-1369-33 Rev. A: ECN 14-03-005B

Manual

Reset

Button

Sealing

Ring

Air Valve

Tubing

Locking

Slope

Gripping

Ridge

Tube
Stop

8

7

6

5

13

12

4

11

10

9

3

2

1

AST4 Valve Repair Kits

Operation and Service Guide: Ablution

P.O. Box 309 • Menomonee Falls, WI 53052-0309

1.800.BRADLEY • Fax: [phone] • bradleycorp.com

AST 4 Valve Kit

Item Description

1 Diaphragm 1 — 1

2 Armature 1 — 1

3 Spring 1 — 1

4 AST 4 Valve Upper Body 1 — —

5 Spring 1 1 —

6 Magnet / Diaghragm Assembly 1 1 —

7 AST 4 Valve Cover 1 1 —

8 AST 4 Valve Clamp Nut 1 1 —

9 AST 4 Valve Timer Assembly 1 — —

10 O-Ring, #2-012 1 — —

11 AST 4 Valve Timer Cover 1 — —

12 Screw, #8 x 7/8" 3 — —

13 Compression Nut, 1/8" Tube 1 1 —

S65-260

Repair Kit (Upper)

S65-261

Qty.

Repair Kit (Lower)

S65-262

2 of 3 Bradley • 215-1369-33 Rev. A: ECN 14-03-005B

Operation and Service Guide: Ablution

P.O. Box 309 • Menomonee Falls, WI 53052-0309

1.800.BRADLEY • Fax: [phone] • bradleycorp.com

Metering Air Valve Troubleshooting

Problem Cause Solution

Valve will not shut off. Timing mechanism is clogged. Clean and inspect timing mechanism.

1. If compressed air is available, blow water and debris from timer
cover of timing mechanism.

2. Turn adjusting screw out all the way. Clean and inspect screw
and valve body.

3. Turn adjusting screw in to desired cycle time.

Valve will not turn on. Water is not being supplied to unit. Open all stops on mixing valve.

Water pressure is over 80 PSI. Install a pressure reducing valve.

Timing can not be adjusted
for more than 5 seconds.

Push button does not work
properly.

Water is dripping from the
spouts or shower heads

Failed diaphragm/magnet assembly. Unscrew the valve clamp nut on valve. Remove valve cover.

There is an air leak. Check the valve assembly.

Air volume may not be sufficient to
operate valve.

Debris has accumulated on valve
seat or orifices.

Gently press the diaphragm. The valve should activate. If not,
replace the diaphragm/magnet assembly.

1. Check all tubing and fittings for proper assembly.

2. Tighten cap and nut on 1/8" tubing.

Check for leaks and lubricate U-cup.

1. Check all fittings for air leaks.

2. Disassembly push button and lubricate U-cup seal.

Clean and inspect valve seat.

1. Remove screws and disassemble metering valve.

2. Clean valve seat and inspect for deep gouges or scratches.
Replace valve body if necessary.

3. Remove any debris clogging off-center hole in rubber diaphragm.

3 of 3 Bradley • 215-1369-33 Rev. A: ECN 14-03-005B