TB
5-4220-200-12-1
(18) With a 1-3/8 inch open end wrench, unscrew and remove the spring retainer (26) from the regulator
body (15). With a 5/16 inch flat tip screwdriver, unscrew and remove adjusting screw (27) from the
spring retainer (26). Remove adjustment spring (25).
(19) With needle nosed pliers, remove the diaphragm spring pad (24)
(20) With tool 1588-13, remove the diaphragm gasket (23) and diaphragm (22).
(21) Remove the regulator body (15) from the vise and reposition the regulator body so that the filter as-
sembly opening is pointing upward. Gently tap the regulator body against a soft, flat surface. This wiII
cause the pin support (21) to come out.
NOTE
This completes the disassembly instructions. Proceed to Section III. paragraphs
b.
First Stage Regulator Reassembly.
(1)
Insert (plastic) back-up ring (11) into the spring block (10). Install spring block O-Ring (12) into the
spring block (10).
(2)
Mount the first stage regulator body (15) in a soft jaw vise with the filter assembly opening pointing
downward.
(3)
Insert the pin support (21) with the pin support shaft inserted into the body of the first stage regulator
(15).
(4)
Insert the diaphragm (22) into the regulator body (15). Insure that the diaphragm is properly seated
in the regulator body.
NOTE
If old diaphragm is reinstalled it must be positioned as before disassembly.
(5)
Insert the diaphragm gasket (23) into the regulator body.
(6)
Place the diaphragm spring pad (24) on top of the diaphragm (22). Insure that the largest flat surface
is next to the diaphragm.
(7)
Screw the spring retainer (26) into the regulator body (15). until there is evidence of pressure on the
spring retainer. Using a 1-3/8 inch open end wrench, tighten the spring retainer securely.
(8)
Place the adjustment spring (25) on the diaphragm spring pad (24)
(9)
Screw the adjusting screw (27) into the spring retainer (26) several turns.
(10) Reposition the first stage regulator body (15) in the soft jaw vise so the filter assembly opening is fac-
ing upward. Tighten the jaws of the vise securely against the flat sections in the regulator body.
(11) With needle nosed pliers, insert the largest end of the pin (20) into the opening in the regulator body
_
(15) as seen when looking into the filter assembly opening, and seat it in the small interior opening
of the regulator body.
(12) With the needle nosed pliers, place the disc and retainer (14) on the pin (20). Insure that the disc and
retainer pin (20) is properly seated inside the disc and retainer (14).
(13) Reposition the regulator body in the soft jaw vise so the filter assembly opening is pointing upward
and tighten the vise securely against the flat section of the spring retainer (26).
(14) Insert the disc and retainer spring (13).
(15) Insert the spring block assembly (10, 11, and 12) into the disc and retainer spring (13). Insure the
opening in the spring block assembly is facing downward.
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