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INTRODUCTION
This manual is a guide for the annual servicing and maintenance of the Sherwood SR3108 Minimus and
SR3209 Shadow+ regulators. It gives breakdowns of regulator parts, equipment specifications, servicing
instructions, troubleshooting recommendations, and guidelines for proper care of these regulators. This manual
is intended for use
only by persons specially trained and authorized to service Sherwood Scuba equipment.
Because of the many unique features found only in Sherwood regulators, Sherwood conducts seminars on
a regular basis throughout North America to train technicians in proper service and repair procedures for all
current Sherwood regulators. In addition, all Sherwood dealers and their staff members are encouraged to
attend the seminars to gain an in-depth understanding of the construction, special features and operation of
Sherwood regulators.
NOTE: You must be authorized by Sherwood to work on Sherwood Scuba equipment. You can obtain
proper authorization by attending all appropriate seminars given in your area. This is the only way you can
become an authorized Sherwood technician.
For information on the dates and locations of upcoming Sherwood service seminars near you, contact your
Sherwood Distributor or Sherwood Sales Representative.
IMPORTANT
Anyone attempting to service or repair Sherwood Scuba regulators must have a thorough understanding
of the principles of operation of scuba regulators and valves, as well as the appropriate mechanical ability. The
technician must also be properly trained in the safe use of compressed air and the various tools and cleaning
solutions involved in the procedures outlined in this manual.
SPECIFICATIONS
REGULATOR MODEL . . . . . . . . . . . . . . . .Sherwood SR3108 Minimus & SR3209 Shadow+
AIR FLOW . . . . . . . . . . . . . . . . . . . . . . . . .29 cu. ft. / min. @ 1 atmosphere
INHALATION RESISTANCE . . . . . . . . . . .1.5" w.c @ 1 atmosphere
EXHALATION RESISTANCE . . . . . . . . . . .0.8" w.c. max. @ 1 atm.
RECOMMENDED LUBRICANTS . . . . . . . .LTI Christo-Lube #1110, Dow Corning 111 Compound
®
, Parker
Super O-Lube
®
, or equivalent
TYPE . . . . . . . . . . . . . . . . . . . . . . . . . . . .Downstream valve, diaphragm, with Variable Fulcrum
U.S. Pat. #3,991,785
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .4.2 oz. (octopus w/o main hose
8.1 oz. (Shadow+ w/o main hose)
HOSE LENGTH . . . . . . . . . . . . . . . . . . . . .36 in.
MATERIALS . . . . . . . . . . . . . . . . . . . . . . .Cover - Thermoplastic Triax
Case - Thermoplastic Triax
®
Poppet Seat - Liquid Silicone Tm Rubber
0-rings - Buna-N
®
Diaphragm - Tufel
®
(Blue)
Exhaust Valve - Thermoplastic Elastomer
Mouthpiece - C-Flex
®