Sherwood MAXIMUS SRB3600 User Manual download pdf (Page 22)

6.5.4 External Air Leaks

1 Attach the regulator first stage to a tank short enough to totally submerge the first and second

stage in your filling station cooling water.

2. With the tank valve still turned off, flood the second stage completely with water, and then

position it mouthpiece up.

3. Turn the tank air valve on

slowly and then watch for any leaks in the first or second stage

(except for the normal flow of air from the one-way bleed valve on the first stage). Look

particularly closely at the first stage area where the adjusting module meets the body. If the

module-to-body O-ring is in the wrong groove, you will see air leaking from between the

module and the body instead of from the black one-way bleed valve system.

4. Repair any leaks.

5. Check for the correct positive air purge flow rate. See

Section 5.4, Testing of First Stage, for

the proper method.

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Sherwood MAXIMUS SRB3600 User Manual Page 22