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Sherwood SRB3200 manual

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Table of contents for the manual

  • Page 1

    ® REGUL A T ORS (SRB3 3 00) (SRB3400) (SRB3500) ® ® ® As sembly & Maintenanc e Guide Includes (SRB3200) ®[...]

  • Page 2

    FIRS T S T AGE - MAGNUM®II SRB3 300, BLIZZARD® SRB3200, OASIS® SRB3400 NOTE: The Oasis ® + SRB3500 uses the SRB3601 externally adjustable first stage. The parts breakdown and servicing of the SRB3601 is cover ed in the Oasis2/Blizzar d Assembly & Maintenance Guide . Oasis ® + regulators manufactur ed in 1990 have the SRB3801 first stage wi[...]

  • Page 3

    T ABLE OF CONTENTS Page 1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 2.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.1 SRB3300 (Magnum II, SRB3400 (Oasis) and SRB3500 (Oasis+) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.0 O-ring Reference Ch[...]

  • Page 4

    1 1.0 INTRODUCTION 1. The procedur es in this manual apply to the Sherwood Scuba MAGNUM II (SRB3300), OASIS (SRB3400), and OASIS+ (SRB3500). The most current part numbers can be obtained by calling your Sherwood Sales Representative or Sherwood Scuba Customer Service. All current Sherwood Scuba Regulators have service kits available which contain t[...]

  • Page 5

    6. Companion instructional VHS videotapes to this and other Sherwood Scuba repair manuals ar e available from Sherwood Scuba at a nominal cost. Ask your Sherwood Scuba Sales Representative for details. 7. If you have any questions, or need more information, contact your Sherwood Scuba Sales Representative or Sherwood Distributor . 2[...]

  • Page 6

    2.0 SPECIFICA TIONS 2.1 SPECIFICA TIONS FOR THE SRB33 00 MAGNUM® II, SRB3400 & SRB3500 OA SIS® REGULA TOR MODELS: Sherwood Magnum II SRB3300, Oasis SRB3400 & SRB3500 AIR FLOW: 28-29 cu. ft. (793-821liters)/min. @ 1 atmosphere INHALA TION RESIST ANCE: 1.1” (2.8 cm) w .c. @ 1 atmosphere EXHALA TION RESIST ANCE: 0.8” (2 cm) w .c. max. @ [...]

  • Page 7

    3.0 O-RINGS REFERENCE CHART 1. Before you begin disassembly of the r egulator , test the first and second stages for output pressur es and leakage. Pre-testing in this way will help the technician to pinpoint any specific problems r equiring repair . 2. The work area must be clean and well lighted, with clean compr essed air available to blow sand [...]

  • Page 8

    4 . 0 FIRS T S T AGE PROCEDURE S 4 .1 T OOLS REQUIRED FOR FIRS T S T AGE SERVICING – Bench vise – 3/32" Allen wrench – 5/32" Allen wrench – 6" or 8" adjustable wrenches – 15" adjustable wrench – Phillips screwdriver – #10 T orx screwdriver – Sherwood 50 cc Graduated Cylinder (p/n TL110) – Sherwood Piston S[...]

  • Page 9

    4. Use a 5/32 ” Allen wrench, and a small adjustable wr ench to remove all port plugs and hoses from the body . 5. Install a Sherwood regulator support handle (p/n TL113) into one of the low-pr essure ports. Use the support handle and a 15 ” adjustable wrench or bench vise to loosen the yoke nut from the body . See Photo #1. 6. Remove the yoke [...]

  • Page 10

    a. Keep greasy fingertips away fr om the flow element during servicing. b. Use a clean, dry cloth to wipe the piston surface if it needs cleaning. c. Do not put the piston in a cleaning solution or ultrasonic cleaner . If there is any oil on the surface, it will coat the piston. d. A coating of grease or oil will interfer e with the air flow throug[...]

  • Page 11

    The sealing surface on the body where the one-way valve seals must be totally clean of deposits. If any deposits remain on the sealing surface after initial cleaning, take a fine abrasive polishing stick or a pencil with a new eraser and polish the surface to remove deposits (see Photo #3). 13. Blow all residue fr om the body after polishing. 14. R[...]

  • Page 12

    4 . 3 ASSEMBL Y OF FIRS T S T AGE 1. The part number for each regulator kit can be found in Sherwood ’ s T ools, Repair Kit and Accessories - Assembly & Maintenance Guide . The kits contain the minimumparts that must be replaced at every annual service interval. The technician will also evaluate the condition of all other parts to determine r[...]

  • Page 13

    13. Install the handwheel and the dust cap onto the yoke. 14. If the first stage has a SAA-5300 DIN adapter installed instead of a standard yoke, see the installation instructions given in Sherwood T echnical Bulletin #104 for overhaul and installation instructions of the DIN adapter . 4 .4 TES TING OF FIRS T S TAGE A . Before Y ou Begin T esting 1[...]

  • Page 14

    C. Intermediate Pres sur e T est 1. Attach any Sherwood second stage to one of the low pr essure ports, and the Sherwood intermediate pressur e gauge (p/n TL119) to another low pressure port. Plug all other ports with appropriate port plugs. 2. Attach the r egulator to a tank valve giving a source pressur e of between 2700 and 3500 psig (186-240 Ba[...]

  • Page 15

    5.0 SECOND S T AGE PROCEDURE S 5.1 T OOLS REQUIRED FOR SECOND S TAGE SERVICING – T wo good quality 6" or 8" (15 or 20 cm) adjustable wrenches – #10 T orx screwdriver – Small Phillips ACR Screwdriver – Size 0 Square Drive (Robertson Head) scr ewdriver – Side cutting pliers – Sherwood In-line Adjusting T ool ( p/n TL102 ) – Sh[...]

  • Page 16

    13 a. Place the cover assembly with the pur ge button logo face down on a clean flat surface. b. From the inside of the cover assembly , push the four barbed tabs holding the pur ge button assembly in place in towards each other . This will release the purge button assembly from the cover . c. If only the label insert was purchased for installation[...]

  • Page 17

    13. If parts of the lever assembly (stem, spring, lever , etc.) need to be replaced, take apart the assembly with the Sherwood stem socket tool (p/n TL124) Clamp the stem socket tool in a bench vice. Insert the square head of the poppet stem into the tool. With a Phillips scr ewdriver , or preferably a size 0 Squar e Drive (Robertson Head) screwdri[...]

  • Page 18

    5. Screw the orifice housing onto the thr eads of the lever assembly . With a 13/16 ” wrench on the orifice housing and a Sherwood modified 3/4 ” deep socket (clamped in a vise) on the hex of the lever support inside the case, tighten the orifice housing and the lever assembly together snugly (70 in. lbs. / 8 Nm). 6. Install the diaphragm into [...]

  • Page 19

    4. T ur n on the air . Use the in-line adjusting tool to tur n the adjusting orifice counter -clockwise until you hear a slight hissing. Then turn the adjusting orifice clockwise just enough to stop the hissing. HINT : A slight clockwise tur n past the point where the hissing just stops will r educe wear and tear on regulators used heavily in r ent[...]

  • Page 20

    11. Replace the diaphragm. Continue to test the gap between the lever and the diaphragm after each bending until the lever is in the correct position. 12. Retur n to Section 5.3.4 of this manual to complete assembly of the regulator . 5.5 TES TING OF SECOND ST AGE A . Inhalation Effort Check the inhalation effort of the second stage with a pan of w[...]

  • Page 21

    D. External Air Leaks 1 Attach the regulator first stage to a tank short enough to totally submer ge the first and second stage in your filling station cooling water . 2. With the tank valve still turned off, flood the second stage completely with water , and then position it mouthpiece up. 3. T urn the tank air valve on slowly and then watch for a[...]

  • Page 22

    6.0 HELPFUL HINTS 6.1 TROUBLESHOOTING REGUL A TORS POSSIBLE CAUSE RECOMMENDED ACTION A . High Inhalation Effort at Depth: 1. Inlet filter clogged. Replace the filter . 2. No air flowing through the dry air bleed system. Check the flow rate coming out of the one-way bleed valve . If no or low air flow is detected, clean the flow element in the pisto[...]

  • Page 23

    C. Wet Br eathing: 1. Improper clearing, or diver diving in total Instruct the diver on proper clearing head-down position. technique. 2. Diaphragm improperly installed. Check position of diaphragm visually . 3. Hole in the mouthpiece at tie area. Replace the mouthpiece. 4. Hole in the diaphragm. Replace the diaphragm. 5. Damaged exhaust valve, or [...]

  • Page 24

    6. 2 PARTS CLEANING RECOMMENDA TIONS Regulators which see heavy use, particularly those used in salt water , often requir e extra effort to remove dirt and corr osion from the parts of the regulator . Some suggested cleaning solutions are listed at the end of this section, and ther e are probably many others being used successfully . Her e are a fe[...]

  • Page 25

    6.4 HANDLING TIPS How your customers treat their r egulators will directly influence the unit ’ s function and durability . Following ar e a few tips that you can pass on to your customers to help assure the durability of their Sherwood Scuba regulator . A . Pre-Div e Checks 1. Check the hoses and hose connections for cuts, abrasions or other sig[...]

  • Page 26

    7 .0 TWO YEAR WARRANTY AND MAINTENANCE INFORMA TION 7 .1 PROPER PROCEDURE FOR WARRANTY PAPERWORK 1. For detailed information on the operation of Sherwood Scuba T wo Y ear Limited Warranty , please refer to Sherwood Scuba T echnical Bulletin # 112. Y ou can also contact your Sherwood Distributor if you still have questions about the warranty . 2. In[...]

  • Page 27

    ITEM # CA T ALOG # DESCRIPTION 1 ...................................3207-2 ..........................Label 2 ...............................3004-1 ............................Purge Button (no label insert) 3 ..........................19-4006-12 ..........................Purge Button Spring 4 ...............................3302-7 ...................[...]

  • Page 28

    Printed in the U.S.A on recycled paper Sherwood Scuba, the SS symbol, Oasis, Blizzard, Magnum, Brut and Wisdom are trademarks of Sherwood, Harsco Corporation Gas and Fluid Control Gr oup. All other names are trademarks of their respective owners. ALL PRODUCTS SUBJECT TO CHANGE WITHOUT NOTICE. 6204 Goodrich Road Clarenc e Ctr, New Y ork 14032 www. s[...]