Remove the demand regulator clamp

Kirby Morgan 37 & 57

7.7.3Inspection of SuperFlow 350 Regulator Body Interior

Tools Required:

1/4 inch Flat Blade Attachment on Torque Screw- driver

Remove the demand regulator clamp.

1)Remove the demand regulator clamp by removing the clamp screw.

2)Lift off the regulator cover and diaphragm.

3)Clean the diaphragm with the soapy solution, per Chapter 6 and wipe dry. Inspect the diaphragm for holes, tears or any signs of deterioration by holding it up to a white light and stretching and pulling. Check for a good bond between the metal disc and the sili- cone. Replace diaphragm if any doubt exists.

4)Inspect the interior of the demand regulator body for damage, corrosion and cleanliness. Clean the in- terior of the regulator body if necessary per Chapter 6.

6)Reinstall the diaphragm, cover, and clamp. Tighten the clamp screw to the recommended torque to 12 inch pounds using a torque screwdriver.

WARNING

Use only replacement diaphragms manu- factured by Kirby Morgan. Use of other diaphragms may degrade performance and may cause increased breathing re- sistance. This can lead to fatigue and the inability to work at full capacity.

NOTE: Older regulator clamps, when properly torqued, had a gap of approximately 1/32” to 1/16” between the retaining clamp surfaces when fully tightened. All new clamps when properly torqued, have little or no gap between the retain- ing clamp surfaces.

7.7.4SuperFlow 350 Demand Regulator Bias Adjustment

Servicing, Demand Regulator on the Helmet

Note: This procedure should be used when replac- ing the O-ring on the adjustment shaft and or cleaning and lubricating the shaft threads during field repairs of the demand regulator on the helmet. Start at the adjustment knob end of the regulator:

Tools Required:

3/4 inch Open-end Wrench Attachment on Torque Wrench

3/32 inch Punch & Small Block of Wood Ball-Peen Hammer

Regulator Adjustment Tool Kit, Part #525-620 Torque Wrench

1)Unscrew the regulator adjustment knob until it stops. If the knob wobbles as you turn it, or is ex- tremely hard to turn, the shaft is bent and needs to be replaced.

Screw the regulator adjustment knob out for removal.

2)Loosen the nut, then rotate the adjustment knob counterclockwise until the adjustment knob and the adjustment shaft are free.

3)Remove the spacer, springs, and piston. At this point the threads can be cleaned and lubricated as well as the adjustment shaft.

4)Punch out the roll pin using a 3/32 punch. Use a block of wood with a 1/4” hole drilled through it to support the knob. Position the knob so the roll pin