Photo #1

4.Install a Sherwood regulator support handle (p/n TL113) into one of the low-pressure ports. Use

the support handle and a 15" adjustable wrench or bench vise to loosen the yoke nut 9 from the body 13 . See Photo #1.

5.Remove the yoke 10 and yoke nut 9 from the body.

6.Use a 5/32" Allen wrench to remove all remaining port plugs 12 16 from the body.

7.Use the Sherwood regulator support handle and a 15" adjustable wrench or a bench vise to remove the cap 26 from the main body. If the regulator is an Oasis or Blizzard model, the trim ring 28 will slide off at this time.

8.Remove the spring 19 , any shims 20 , and the piston assembly 23 from the cap. Remove both piston O-rings and discard them.

9.Remove the piston seat 22 by pushing through the stem with the Sherwood piston seat removal tool (p/n TL112) from the large end. The seat will then pop out. Discard the old seat.

10.Using a 3/32" Allen wrench, remove the flow control element assembly 18 from inside the large end of the main body. There are two styles of flow control assemblies. The old style with a sintered stainless steel flow restrictor and the new style flow restrictor that is laser drilled P/N 5105-13 with a white filter P/N 5105-14. The new style complete assembly part number is

5105-15. If the regulator has the old style flow restrictor and it is functioning (13 to 27 cc/min) it can be reused, however if it needs to be replaced use the new style. The black gasket can be reused. The new style restrictor can be cleaned if it becomes plugged. Remove the white filter and discard it. The white filter must be replaced P/N 5105-14. The laser drilled flow restrictor can be cleaned in an ultrasonic cleaner and reused. The flow requirement for the new flow control assembly is 20 to 30 cc/min.

NOTE: If a Sherwood DIN adapter (p/n SAA5300)is installed in place of the normal yoke assembly, remove it at this time. See Sherwood Scuba Technical Bulletin #104 for servicing procedures for the SAA5300 DIN adapter.