Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Sherwood Scuba SR2
Summary of Contents for Sherwood Scuba SR2
- Page 1 SR2 Service Manual - First Stage -...
- Page 2 Before attempting to perform service read this manual in its entirety. There are warnings and cautions contained in the manual that may affect your safety or the safety of the regulator user. If you are uncertain as to whether you are qualified to perform this service contact your regional Sherwood Scuba Distributor for technical assistance.
- Page 3 In any case the regulator should receive a standard service overhaul at least every two years to maintain optimal performance. The standard service overhaul includes disassembly, cleaning, inspection, replacement of seals, lubrication, reassembly and adjustments. Sherwood Scuba offers a standard service kit that contains the parts recommended to be replaced in combination with the standard service overhaul.
- Page 4 3000 psi. Again check intermediate pressure. It should not exceed 145 psi. The specified intermediate pressure for the SR1 & SR2 is 135+/- 10 psi. If intermediate pressure is out of range or leakage is present a standard service overhaul is recommended.
-
Page 5: General Comments
www.sherwoodscuba.com GENERAL COMMENTS NOTE – Read this section first before attempting to perform service. Read the entire set of procedures that follows before starting to service. Steps taken out of sequence or without the knowledge of the proper procedure could damage the regulator or otherwise complicate the service process. Refer to the Illustrated Parts List while performing service. -
Page 6: Facility Requirements
ENRICHED AIR NITROX SERVICE All SR1 & SR2 components & service kit 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. -
Page 7: Common Tools
RECOMMENDED TOOLS AND SUPPLIERS The specialty tools identified below may be purchased from your Sherwood Scuba Distributor. Common tools are available from several sources. Common Tools Open End Wrenches - 9/16”, 5/8”,1/2” Box End Wrench – 3/4” Hex Keys 1/4”, 5/32”,1/8”... -
Page 8: Disassembly Procedure
www.sherwoodscuba.com DISASSEMBLY PROCEDURE Record the First Stage and Second Stage serial numbers and an inventory of all attached accessories before beginning disassembly. Perform an inspection of the regulator in accordance with the Annual Inspection Guidelines. This process will give the technician a reference point if the after the overhaul the regulator does not perform as expected. Remove all hoses attached to the first stage with a 9/16”... - Page 9 www.sherwoodscuba.com Remove the Yoke Retainer (10), Yoke (36), Inlet Protector (13), and Saddle (12). Separate the Yoke Knob from the Yoke and set aside for cleaning. Yoke Retainer Disassembly - While holding the Yoke Retainer securely, use Snap Ring Pliers (PN 10-101-500) to compress the Retaining Ring (23) and remove it from the groove inside the Yoke Retainer.
- Page 10 www.sherwoodscuba.com c. If rotating the hex key results in the DIN Filter Housing and DIN Filter Retainer separating from the Body as a unit, this is acceptable but it will be necessary to separate the parts for reassembly. Place the DIN Filter Housing in a vise clamping over the flats on the largest diameter on the DIN Filter Housing.
- Page 11 www.sherwoodscuba.com 11. Use tool 20-115-100 to stabilize the LP Ports. Place 1/4” hex key in the Swivel Retainer (5) and rotate it counterclockwise to separate the End Cap (2) from the Port Swivel (3). Remove the two O-rings; keep 39 and discard 28.
- Page 12 www.sherwoodscuba.com 16. Remove the Two- piece Piston Assembly as follows: CAUTION – Be careful not to damage the seating surface of the Piston Stem when performing the next step. Even the slightest nick or distortion of the seating surface may cause a high pressure leak when reassembled requiring disassembly of the first stage and replacement of the Piston Stem.
- Page 13 www.sherwoodscuba.com d. Push on the threaded end of the Piston Stem through the bore to remove it from the Body. Remove the O-ring (21) and two back-up rings (20) and discard them. Set aside the Piston Stem and cleaning, inspection and reas sembly.
-
Page 14: General Cleaning Procedure
Scrub with a soft nylon bristle brush to remove deposits. b. If warm water soaking & scrubing does not remove mineral deposits, use a commercial grade heated ultrasonic cleaner. Sherwood Scuba recommends Lawrence-Factor’s LFW (CM-763215-CN) solution diluted with water (25% LFW/75% water) and a 3-10 min treatment. - Page 15 www.sherwoodscuba.com INSPECTION AND LUBRICATION PROCEDURES General – Inspection and lubrication must be preceded by thorough cleaning to enable adequate exposure of damaged parts and proper application of lubricant. Inspection 22. Inspect all O-rings that are intended for reinstallation (26, 27, 34, 35 & 39), for signs of damage such as tears, cuts, deformation, brittleness or abrasion.
- Page 16 www.sherwoodscuba.com 27. Inspect the Dry Chamber Diaphragm (18) for signs of damage such as cuts or tears. If damaged replace it. 28. Inspect the Yoke (36) and Yoke Retainger (10) for cracks or distortion. If deformed replace them. 29. Carefully inspect Body (1), Yoke Retainer (10) or Din Filter Housing (42), Port Swivel (3), Swivel Retainer (5) and first stage diaphragm Retainer Cap (17) for damage to threads.
-
Page 17: Reassembly Procedures
The two back-up rings must have their cupped surfaces against the red o-ring. Picture also shows white piston guide (40) used in SR2 only; cone tool should not be used to install the Piston Guide. - Page 18 www.sherwoodscuba.com d. Place the sealing end of the Piston Stem over a 5/32” hex key and use this tool to guide the Piston Stem’s threaded end through the Body until it is positioned at the opposite side of the Body & ready to receive the Piston Flange.
- Page 19 www.sherwoodscuba.com 34. Install general lubricated O-ring (34) taking care to avoid damage to the O-ring as it passes over the threads on the Body. CAUTION – It is imperative that O-ring (37) is amply lubricated to minimize deformation when the HP seat retainer gets fully torqued over the o-ring, apply additional lubricant if needed.
- Page 20 www.sherwoodscuba.com CAUTION – It is absolutely essential for the surface of the seat to be clean and free of any scratches, distortion or any contaminants to ensure it will seal against the incomming high pressure, failure to observe this precaution may result in leakage and possible damage to the regulator. 35.
- Page 21 www.sherwoodscuba.com If the first stage has a yoke type connector go to steps 38 thorough 42. If the first stage is a DIN type, go to step 43. 38. Install a new Filter in the Yoke Retainer and secure with the Retaining Ring (23) . Compress the Retaining Ring with Retaining Ring Pliers and insert it into the bore of the Yoke Retainer until it seats in its groove.
- Page 22 Dry Chamber Diaphragm (or remove cap and diaphragm and apply presure to pressure plate if working on SR2) and then purge the second stage. Repeat this cycle 10 to 15 times to ensure all internal com- ponents are moving freely. If the intermediate pressure does not stabilize within the specified range either the Seat or the sealing tip of the Piston Stem are damaged or contaminated.
- Page 23 www.sherwoodscuba.com ITEM PART # DESCRIPTION ITEM PART # DESCRIPTION ITEM PART # DESCRIPTION 2015-9 Body 1105-14 Piston Stem 1105-23 Accent Ring 2105-20 Retainer Cap 970023 O-ring 1105-26 End Cap 2105-19 Dry Chamber Diaph 970904 O-ring 1105-24 Port Swivel 1105-17 HP Seat Retainer 1105-27 Washer, Teflon 1105-31...
Need help?
Do you have a question about the SR2 and is the answer not in the manual?
Questions and answers