Sherwood Scuba BRUT SRB 9110 Service Manual page 5

ENRICHED AIR NITROX SERVICE
The Sherwood regulator presented in this manual has been designed and manufactured to allow the use of Enriched
Air Nitrox (EAN) gas with an oxygen component not to exceed 40%.
In order to maintain this option the user must ensure that the regulator is protected from the introduction of
hydrocarbons. The introduction of hydrocarbons into the regulator may increase the risk of fire when used with EAN.
When servicing the regulator, the technician must be aware of this requirement and exercise caution not to
contaminate the regulator with hydrocarbons. This requires a clean workplace, free of oil, grease, debris and other
contaminants. Additionally in order to return the regulator to EAN service, the overhaul procedure must have a
cleaning provision to remove all hydrocarbons before the regulator is reassembled. Do not substitute parts or use
lubricants other than Tribolube 71 or Christo-Lube MCG 111. Silicone lubricants are not acceptable and increase the
risk of a fire hazard.
WARNING – The introduction of hydrocarbons, lint, dirt and other contaminants into the areas of
the regulator subjected to high pressures (greater than 500 psi) and EAN mixtures containing more
than 40% oxygen may constitute a fire hazard and may subject the user to serious injury.
FACILITY REQUIREMENTS
The service facility is perhaps the most important asset of any professional dive store. It should be clean, well lighted,
and stocked with a complete inventory of parts and manufacturer's specialty tools for the products your store sells. As
a minimum requirement, your service facility should be equipped with the following items:
• Ultrasonic Cleaner - Select the right size model that can keep up with the volume of regulators that your
store services. A built-in timer and heater will help control the cleaning time and temperature of the solution,
since most solutions work best when heated.
• Bench Mounted Padded Vise - A vise is sometimes needed to hold the regulator secure – especially when remov-
ing the first stage yoke retainer. Special care must be taken, however, to avoid damage that can result from im-
proper use of this tool. Vise must be lined with soft material like rubber or wood. Be sure to follow the instructions
provided in this manual.
• Magnification Lamp - Strong lighting and magnification are essential requirements for performing a
thorough parts inspection - especially when locating the cause of a small leak.
• Quality Wrenches & Sockets - When working with chrome plated brass parts, it is especially critical to use
the correct size wrench and to ensure that it fits properly over the part. The use of an adjustable wrench is very
likely to cause damage to your customer's regulator, and should be strictly avoided at all times.
• Calibrated Inch-Pound Torque Wrench - it is important to follow the manufacturer's torque values
whenever they are specified, in order to avoid overtightening or under tightening a part. This is especially
important for smaller parts and fittings, when overtightening can easily damage the part.
• Calibrated Foot-Pound Torque Wrench - Torque wrenches that can be set for both inch-pound and
foot-pound measurements generally tend to be less accurate than wrenches that are designed to measure torque
within a specific range.
• Manufacturer's Specialty Tools - Specialty tools are critically important to performing each step of
disassembly and reassembly according to each manufacturer's procedures. Sherwood specialty tools are
required to perform service are listed on the following page.
www.sherwoodscuba.com
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