Sherwood SRB5700, SRB5300, SRB5100, SRB5900 User Manual

Assembly & Maintenance Guide

(SRB5300)

(SRB5900)

(SRB5700)(SRB5100)

™

REGULATORS

FIRST STAGE - OASIS™ SRB5700, BLIZZARD™ SRB5900, MAGNUM® SRB5300, BRUT™ SRB5100

To determine the first stage of a particular regulator, compare the regulator with the pictures and diagrams in this guide. The model number of the regulator is laser stamped on the first stage between two of the outlet ports. For further information, contact Sherwood at 1(888) 50-SCUBA.

ITEM # CATALOG # DESCRIPTION

1 . . . . . . . . . . .5105-70 . . . . . . . . .Handwheel

2 . . . . . . .J2790056B . . . . . . . . . .Filter Retaining Ring

3 . . . . . . . . . . .1390-7 . . . . . . . . .Filter

4 . . . . . . . .29-5305-4 . . . . . . . . . .Oasis, Blizzard &

Magnum Moving Orifice (bare, no O-rings)

4B . . . . . . .43-5105-4 . . . . . . . . . .Brut Removable Orifice

(bare, no O-rings)

5 . . . . . . . .19-8010-8 . . . . . . . . . .Belleville Spring Washers

(5 needed)

6 . . . . . . . . . .G007A . . . . . . . . . . .O-ring

7 . . . . . . . . MS28774-007 . . . . . . .White Backup Washer

8 . . . . . . . . . . .5705-20 . . . . . . . . .Dust Cap

9 . . . . . . . . .1-1665-17 . . . . . . . . .Yoke Nut

10 . . . . . . . .2-1665-26 . . . . . . . . .Yoke (shiny finish, Brut, Magnum)

10 . . . . . . .69-1665-26 . . . . . . . . .Yoke (matte finish, Oasis, Blizzard)

11 . . . . . . . G904A . . . . . . . . . . .O-ring (for H. P. port plug)

12 . . . . . . . .1-3405-4 . . . . . . . . . .H. P. Port Plug

13 . . . . . . . .2-5105-1 . . . . . . . . . .Brut Body (shiny, 1 H.P. Port)

13 . . . . . . . .2-5305-1 . . . . . . . . . .Magnum Body

(shiny, 2 H.P. Ports)

13 . . . . . . . .69-5705-1 . . . . . . . . . .Oasis/Blizzard Body

(matte finish, 2 H.P., 2 PRI)

14 . . . . . . . . .G011B . . . . . . . . . . .O-ring (for L.P. Port Plugs)

15 . . . . . . . . . .3106-6 . . . . . . . . .One Way Bleed Valve

16 . . . . . . . .1-3105-6 . . . . . . . . . .L. P. Port Plug

17 . . . . . . . . . .5105-6 . . . . . . . . .Gasket for Flow Control Element

18 . . . . . . . . . .5105-15 . . . . . . . . .Flow Assembly

18 . . . . . . . . . .5105-13 . . . . . . . . .Flow Restrictor

18 . . . . . . . . . .5105-14 . . . . . . . . .Filter

19 . . . . . . . . . .5105-12 . . . . . . . . .Main Spring

20 . . . . . . . . . .5105-7PK . . . . . . .Shim (to raise hose pressure)

21 . . . . . . . . .G007A . . . . . . . . . . .O-ring (for small end of piston)

22 . . . . . . . . . .3801-5 . . . . . . . . .Piston Seat

23 . . . . . . . . . .25-5105-3 . . . . . . .Piston (bare, no seat or O-rings)

24 . . . . . . . . .G022A . . . . . . . . . . .O-ring (for large end of piston)

25. . . . . . . . .G025A . . . . . . . . . . .O-ring (for cap)

26 . . . . . . . .2-5105-2 . . . . . . . . . .Brut Cap (shiny, no label)

26 . . . . . . . .2-5305-2 . . . . . . . . . .Magnum Cap

(shiny, indent for label)

26 . . . . . . . .69-5305-2 . . . . . . . . . .Oasis/Blizzard Cap

(matte, indent for label)

27 . . . . . . . . . .5700-15 . . . . . . . . .Cap Label (Magnum, Oasis, Blizzard)

28 . . . . . . . . . .5705-21BK . . . . . .Trim Ring (Oasis, Blizzard only)

TABLE OF CONTENTS

Page

1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

2.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.1 SRB5700 (Oasis), SRB5900 (Blizzard), SRB5300 (Magnum) . .3

2.2 SRB5100 (Brut) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3.0 O-rings Reference Chart . . . . . . . . . . . . . . . . . . . . . . . . . . .5

4.0 First Stage Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

4.1 Tools Required for First Stage Servicing . . . . . . . . . . . . . . . .6

4.2 Disassembly of First Stage . . . . . . . . . . . . . . . . . . . . . . . . . .6

4.3 Assembly of First Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

4.4 Testing of First Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

5.0 Second Stage Procedures . . . . . . . . . . . . . . . . . . . . . . . . .13

5.1 Tools Required for Second Stage Servicing . . . . . . . . . . . . . .13

5.2 Disassembly of Second Stage . . . . . . . . . . . . . . . . . . . . . . . .13

5.3 Assembly of Second Stage . . . . . . . . . . . . . . . . . . . . . . . . . .15

5.4 Set-Up of Second Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

5.5 Testing of Second Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

6.0 Helpful Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.1 Troubleshooting Regulators . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.2 Parts Cleaning Recommendations . . . . . . . . . . . . . . . . . . . . .22

6.3 Commonly Used Cleaning Solutions . . . . . . . . . . . . . . . . . . .22

6.4 Handling Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

7.0 Two Year Warranty and Maintenance Information . . . . . . .24

7.1 Proper Procedure for Warranty Paperwork . . . . . . . . . . . . . .24

7.2 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

BEFORE YOU BEGIN.....

READ THESE INSTRUCTIONS COMPLETELY BEFORE YOU BEGIN SERVICING THE REGULATOR.

THESE INSTRUCTIONS ARE INTENDED FOR PEOPLE WHO HAVE BEEN AUTHORIZED BY SHERWOOD TO REPAIR SHERWOOD SCUBA EQUIPMENT. IF YOU ARE NOT SO AUTHORIZED - STOP.

1.0 INTRODUCTION

1. The procedures in this manual apply to the Sherwood Scuba SRB5900 Blizzard, SRB5700 Oasis, SRB5300 Magnum and SRB5100 Brut regulators

only. The older SRB3900 Blizzard, SRB3700 Oasis, SRB3300 Magnum and SRB2100 Brut regulators have different part and service procedures. They have their own manuals that are to be used for guidance during their servicing (Part Numbers T-SC07A93 and T-SC07B93). 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 the parts which

must be changed at every annual service no matter what their condition. The standard

annual service kit for the Blizzard, Oasis, Magnum, and Brut is 4000-15. All other parts not contained in this kit must be inspected by the technician and changed under warranty

only if

they have failed due to problems with material or workmanship.

2. This manual 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.

3. 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 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.

4. The best source for current part numbers for any of the parts listed in this manual is your current parts and price list from Sherwood.

5. Because of the many unique features found 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. For information on the dates and locations of upcoming Sherwood service seminars near you, contact Sherwood Scuba or your Sherwood Sales Representative or Sherwood Scuba Customer Service.

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.

NOTE

: Oxygen Enriched Air conversion kits are available for all current Sherwood regulators and valves. The part number for the models covered in this manual is 4000-15N. These kits are to be installed into properly cleaned and prepared regulators only by technicians trained by one of the major oxygen enriched air training agencies.

WARNING

NEVER tighten the hose fitting to the first stage with more than 40 in. lbs. (4.5 joules) of torque. The inlet hose fitting can be weakened by overtightening.

6. Companion instructional VHS videotapes to this and other Sherwood Scuba repair manuals are 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 Scuba Customer Service.

2.0 SPECIFICATIONS

2.1 SPECIFICATIONS FOR THE SRB5900 BLIZZARD, SRB5700 OASIS, AND SRB5300 MAGNUM

REGULATOR MODEL: Sherwood SRB5900 Blizzard, SRB5700 Oasis,

SRB5300 Magnum AIR FLOW: 33 cu. ft. (935 liters)/min. @ 1 atmosphere INHALATION RESISTANCE: .9" (2.3 cm) w.c @ 1 atmosphere EXHALATION RESISTANCE: 0.7" (1.8 cm) w.c. max. @ 1 atm. RECOMMENDED LUBRICANT: LTI Christo-Lube

A. First Stage Regulator:

TYPE: Flow-by piston with Moving Orifice Balancing and Dry Air

Bleed – U.S. Pat. # 4,226,257 WEIGHT: 1 lb. 11 oz. (.77kg) INTERSTAGE PRESSURE: 135 -150 psi (9-10 bar) MAXIMUM INLET PRESSURE: 232 Bar for SRB5900CE, SRB5700CE,

and SRB5300CE Models POSITIVE AIR PURGE FLOW RATE: 13-27 cc/minute # LOW PRESSURE PORTS: 4 (3/8"-24 UNF) # HIGH PRESSURE PORTS: 2 (7/16"-20 UNF) MATERIALS: Body – CDA-360 Brass

O-rings – Buna-N

Bleed Valve – Ethylene Propylene

Piston Seat – Teflon

B. Second Stage Regulator:

TYPE: Downstream valve, diaphragm, Variable Fulcrum –

U.S. Pat.#3,991,785

WEIGHT: 5.1 oz. (.15 kg) ( w/o hose) HOSE LENGTH: 31 in. (.79 m) MATERIALS : Cover –Thermoplastic vinyl

Case –Thermoplastic Triax

Poppet Seat – Buna-N

O-Rings – Buna-N

Diaphragm – Tufel®(clear blue)

Exhaust Valve – Thermoplastic elastomer (blue)

Mouthpiece – C-Flex

Maximum certified depth is 50m

2.2 SPECIFICATIONS FOR THE SRB5100 BRUT REGULATOR

REGULATOR MODEL: Sherwood SRB5100 Brut AIR FLOW: 30 cu. ft. (850 liters)/min. @ 1 atmosphere INHALATION RESISTANCE: 1" (2.5 cm) w.c @ 1 atmosphere EXHALATION RESISTANCE: 0.7" (1.8 cm) w.c. max. @ 1 atm. RECOMMENDED LUBRICANT: LTI Christo-Lube

A. First Stage Regulator:

TYPE: Flow-by piston with Removable Orifice and Dry Air Bleed –

U.S. Pat. # 4,226,257

WEIGHT: 1 lb. 11 oz. (.77kg) INTERSTAGE PRESSURE: 135 -150 psi (9-10 bar) MAXIMUM INLET PRESSURE: 232 Bar for SRB5100CE Model POSITIVE AIR PURGE FLOW RATE: 13-27 cc/minute # LOW PRESSURE PORTS: 3 (3/8"-24 UNF) # HIGH PRESSURE PORTS: 1 (7/16"-20 UNF) MATERIALS: Body – CDA-360 Brass

O-rings – Buna-N Bleed Valve – Ethylene Propylene Piston Seat – Teflon

B. Second Stage Regulator:

TYPE: Downstream valve, diaphragm, Variable Fulcrum –

U.S. Pat. #3,991,785

WEIGHT: 5.1 oz. (.15 kg) (w/o hose) HOSE LENGTH: 31 in. (.79 m) MATERIALS: Cover – Thermoplastic vinyl

Case – Thermoplastic Triax

Poppet Seat – Buna-N Poppet Seat – Buna-N O-Rings – Buna-N Diaphragm – Tufel

(clear blue) Exhaust Valve – Thermoplastic elastomer (blue) Mouthpiece – C-Flex

Maximum certified depth is 50m

3.0 O-RINGS REFERENCE CHART

1. Before you begin disassembly of the regulator, test the first and second stages for output pressures and leakage. Pre-testing in this way will help the technician to pinpoint any specific problems requiring repair.

2. The work area must be clean and well lighted, with clean compressed air available to blow sand and dirt from parts.

4.0 FIRST STAGE PROCEDURES

4.1 TOOLS REQUIRED FOR FIRST STAGE SERVICING

– Bench vise

– 3/32" Allen wrench

– 5/32" Allen wrench

– 6" or 8" adjustable wrenches

– 15" adjustable wrench

– Phillips screwdriver

– #10 Torx screwdriver

– 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:

White-colored – p/n TL109 (for installing O-ring on piston tip) Green-colored – p/n 38-TL107 (for installing O-ring onto moving orifice)

4.2 DISASSEMBLY OF FIRST STAGE

To view all the parts used in the first stage, fold out the front cover of this manual. The circled numbers below refer to the corresponding numbers on the drawing.

1. Use 6" or 8" adjustable wrenches to disconnect all hoses from the first stage. Pull back the hose protector from the inlet end of the hose. Inspect the hoses for wear. Pay particular attention to the area where the metal ferrules meet the rubber hose material. Replace hoses if necessary.

2. Unscrew and remove the handwheel .

3. Remove the dust cap .

NOTE

: For more information on Sherwood tools and their uses, see Sherwood’s Tools, Repair Kits and

Accessories - Assembly & Maintenance Guide, available from Sherwood.

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