Sherwood REGULATORS manuale d’uso

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

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[...]

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[...]

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[...]

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[...]

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. @ [...]

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 [...]

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[...]

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 [...]

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[...]

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[...]

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[...]

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[...]

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[...]

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[...]

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[...]

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[...]

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 [...]

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[...]

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[...]

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[...]

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[...]

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 [...]

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[...]

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[...]

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[...]

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 ...................[...]

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