5.0SECOND STAGE PROCEDURES
5.1TOOLS REQUIRED FOR SECOND STAGE SERVICING
–Two good quality 6" or 8" (15 or 20 cm) adjustable wrenches
–#10 Torx screwdriver
–Side cutting pliers
–Sherwood
–Sherwood Plastic Probe (p/n TL111) to push out orifice
–Sherwood Lever Height Adjusting Tool (p/n TL123)
5.2DISASSEMBLY OF SECOND STAGE
WARNING
NEVER tighten the hose fitting to the first stage with more than 40 in. lbs. (4.5 joules) of torque. The inlet hose fitting can be weakened by overtightening.
To view the complete parts list of the second stage, fold out the back cover of this manual.
1.Remove the hose assembly 24 from the orifice housing 20 . Inspect the hose assembly for any cuts or cracks, especially on the hose at the metal ferrules. Replace the hose assembly if any cuts or cracks are found.
2.Remove the mouthpiece 17 by cutting the mouthpiece tie 18 with side cutting pliers. Discard the old mouthpiece tie. Examine the condition of the mouthpiece. Pay particular attention to the area on top just behind where the old tie tightened. This is a prime area for small holes to develop. If the mouthpiece is in good condition, it can be reused.
3.Remove the exhaust tee retaining screws 16 with a #10 Torx or slotted screwdriver.
4.Remove the exhaust tee 15 from the case by pulling it back and off the top edge.
5.Remove the cover 2 from the case by inserting the thumb nail under the edge opposite the hose. Slide the cover assembly off of the orifice housing.
6.Remove the diaphragm retaining ring 3 from the case using the fingers.
7.Gently remove the diaphragm 4 from the case. Hold the diaphragm up to a light source. Gently stretch the diaphragm and look for tears or pinholes. If any are found, replace the diaphragm. Otherwise, the diaphragm can be reused. If you are repeatedly tearing diaphragms during this visual inspection, you are using too much force. You cannot return diaphragms torn in this way for warranty credit.
8.Use a 6" or 8" (15 or 20 cm) adjustable wrench to loosen and remove the orifice housing 20 . The case assembly has been reinforced to allow doing this without holding the lever support with another wrench.
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