Genesis Advanced Technologies GRXXX & manual Service & Repair Manual

Service & Repair Manual

4.Ensure that all the first stage ports are sealed, and connect the first stage with a filtered gas supply of 2,500-3,000 psi. Slowly open the supply valve to pressurize the regula- tor. Listen to verify that a leak can be heard from the second stage valve, and proceed to step 6.

a.If airflow cannot be heard, it will be necessary to initiate a slight leak between the orifice and poppet. Press the knurled knob inward to engage the slotted drive of the Inline Adjustment Tool with the head of the orifice inside the inlet fitting. Then, turn the orifice slightly counter-clockwise while lightly depressing the purge cover to prevent wear on the seat. Do not adjust any further than is needed to establish a slight leak.

NOTE: If more than a slight adjustment is required to ini- tiate a leak, it is important to check the adjustment of the locknut on the poppet shaft to verify once again that it is set correctly to its preliminary setting, as specified in Step 8 of the Reassembly Procedure.

5.Hold the drive of the Inline Adjustment Tool engaged with the orifice. While lightly depressing the purge cover, turn the orifice slightly clockwise a very small fraction of a turn. Pause after each adjustment to listen, and be careful to avoid over-adjusting beyond the point that the leak has stopped. When the leak has stopped, purge the second stage several times to ensure that it does not return. Ob- serve the IP Test Gauge while purging the second stage to verify that it indicates a stable intermediate pressure after each cycle, with no creep or fluctuation.

CAUTION: Over-adjustment of the orifice can cause ex- cessive spring load in the second stage valve, and may im- pair the regulator’s performance.

6.While holding the second stage with the mouthpiece facing down, gently shake it up and down. Listen closely to determine whether any movement of the lever can be heard inside, indicating that the lever has dropped. If lever movement cannot be detected, proceed to step 8. Otherwise, perform the following steps to raise the lever:

a.Remove the cover ring, diaphragm cover, and dia- phragm to expose the valve assembly.

b.Shut the supply valve and lightly depress the lever to purge the regulator of air. Remove the Inline Adjust- ment Tool and disconnect the LP hose.

c.While holding the lever depressed, apply a w" open

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