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BEFORE YOU BEGIN:
Before you begin disassembly of the regulator, test the first and second stages for output
pressures and leakage. Pretesting in this way will help you to pinpoint any specific areas
requiring repair. Make sure your work area is clean and well lighted, with clean compressed air
available to blow sand and dirt from parts.
5.0 FIRST STAGE PROCEDURES
5.1 TOOLS REQUIRED FOR FIRST STAGE SERVICING
- Bench vise
- 3/32" Allen wrench
- 5/32" Allen wrench
- 6" or 8" adjustable wrenches
- 15" adjustable wrench
- Pocket screwdriver (slotted)
- Sherwood 50 cc Graduated Cylinder (p/n TL110)
- Sherwood Piston Seat Removal Tool (p/n TL112)
- Sherwood Plastic Probe (p/n TL111) to push out orifice
- Sherwood Regulator Support Handle (p/n TL113)
- Sherwood Intermediate Pressure Gauge (p/n TL119)
- Sherwood Inlet Filter Installation Tool (p/n TL115)
- Sherwood O-ring Installation Cones:
Brass-colored - p/n TL106 (for installing O-ring onto piston tip)
Green-colored - p/n 38-TL107 (for installing first O-ring onto moving orifice)
Black-colored - p/n 29-TL108 (for installing second O-ring onto moving orifice)
- Annual Service Kit # 4000-4
- Enriched Air Conversion Kit #4000-4N
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NOTE: for more information on Sherwood tools and their uses, see Sherwood's Tools, Repair Kits and
Accessories - Assembly & Maintenance Guide, available from your authorized Sherwood distributor.