SET-UP of Second Stage | Sherwood SRB3600 manual

18.Install the mouthpiece 14 and the new mouthpiece tie 15 from the service kit.

6.4SET-UP OF SECOND STAGE

For the following adjustments, remove the exhaust tee, cover, and diaphragm.

1	Turn the adjusting knob 4 out counter-clockwise all the way, and then in clockwise 1/8 turn.

2.Use a 1/4" nut driver to turn the locking nut 29 counter-clockwise outward, until the lever 26 is just loose enough so that the tip of the lever moves loosely up and down about 1/16".

3.Attach the second stage to its accompanying overhauled and properly adjusted first stage, and mount on an air tank filled to between 2700 and 3500 psig (186 and 240 Bar). Install an intermediate pressure gauge into one of the low pressure ports.

4.With the air off, use a 1/4" nut driver to adjust the nut 29 so that the lever 27 is just barely snugged against the lever support 26 .

5.Fully depress the lever 27 with your thumb. Slowly turn on the tank valve until you hear a slight hissing from the second stage lever area.

6.Release the lever. The air pressure will build up in the hose. When the intermediate pressure gauge reads full and proper intermediate pressure, you should hear no hissing, and the lever should not be loose against the lever support.

a..If the lever is loose against the lever support, depress the lever and turn the adjusting nut clockwise in 1/8 turn increments, releasing the lever between turns to check for snugness and leaks.

b. If the lever is snug against the lever support but air is hissing, depress the lever and turn the adjusting nut counter-clockwise in 1/8 turn increments, releasing the lever between turns to check for snugness and leaks.

7.When you find the point where the lever is snug against the lever support with no hissing, turn the air on fully and depress the lever several times to work the parts in. The regulator should not hiss after this working-in. If it does hiss, repeat Steps 6a and 6b above.

8.With the air on, turn the adjusting knob 4 fully counter-clockwise. You should hear a slight hissing (this is the long term storage position for the second stage). The hissing should stop when you turn the knob clockwise about 1/8 turn.

9.After setting the adjusting nut 29 , check the relationship between the diaphragm wear plate and the tip of the lever assembly.

a.Install the diaphragm and retaining ring. The tip of the lever should just barely touch the diaphragm.

b.Touch the diaphragm lightly with your finger. If there is a significant gap between the lever tip and diaphragm, then the lever is too low. Remove the diaphragm and bend the lever slightly upward with Sherwood's Lever Bending Tool (p/n 4005-16).

c.If the regulator hisses slightly when the air is turned on, but stops hissing when you remove the diaphragm, then the lever is too high. Use Sherwood's Lever Bending Tool to bend the lever slightly downward.