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 (3)  S 033-004Remove the lockwire from the plug (16).
 (4)  S 033-005Loosen the plug (16) one turn to bleed the remaining pressure from the reservoir.
 (5)  S 093-006Remove the safety pins from the reservoir.
 (6)  S 033-007Remove the plug (16) from the body (17).
 (7)  S 033-008Remove the back-up ring (11) and the O-ring (10) from the plug (16).
 (8)  S 033-009Discard the back-up ring (11) and the O-ring (10).
 (9)  S 213-010Examine the rupture disk (14) as follows: (a) Make sure there is a lockwire installed on the retainer (13). (b) Blow into the plug (16) to make sure there are no air leaks around the rupture disk (14). (c) If the lockwire on the retainer (13) was broken or removed, or there are leaks in the rupture disk (14), then do these steps: 1) Remove the retainer (13), rupture disk (14), and gasket (15) from the plug (16). 2) Discard the rupture disk (14) and the gasket (15).
 S 033-011

 (10) Remove the seat (12) from the body (7).

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MAINTENANCE MANUAL

 S 033-012
 (11)
 Discard the seat (12).

 S 033-013

 (12)
 Remove the cotter pin (22), nut (1), washer (2), and bolt (3) that attach the trigger lever assembly (4) to the ear (17) on the body (7).

 S 823-014

 (13)
 Move the trigger lever assembly (4) to the side.

 S 033-015

 (14)
 Remove the knife assembly (20), O-ring (19), and diaphragm (18) from the body (7).

 S 033-016
 CAUTION: MAKE SURE YOU REMOVE AND DISCARD THE CENTER SECTION OF THE
_______
 DIAPHRAGM (18). IF THE CENTER SECTION OF THE DIAPHRAGM (18)
 IS NOT REMOVED, IT IS POSSIBLE THAT THE RESERVOIR WILL NOT
 OPERATE CORRECTLY.

 (15) Remove the center section of the diaphragm (18).
 NOTE: If the center section is not found easily, look for it in the
____ knife assembly (20), body (7), or pressure vessel (9).
 S 033-017
 (16)
 Discard the center section of the diaphragm (18).

 S 113-018

 (17)
 Use dry cleaning solvent to clean the plug (16), trigger lever assembly (4), knife assembly (20), and the other parts disassembled during the above steps.

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757
MAINTENANCE MANUAL

 S 113-019
 (18)
 Dry the parts fully with dry compressed air (approximately 25 psi).

 S 213-020

 (19)
 Examine all of the parts for damage such as nicks, burrs, stripped or crossed threads, corrosion, or distortion.

 S 433-011

 (20)
 Replace the damaged parts, if it is necessary.

 S 213-012

 (21)
 Make sure the trigger lever assembly (4) moves freely.

 S 823-013

 (22)
 Push the plunger (21) of the knife assembly (20) into the housing and then release the plunger (21).

 S 213-014

 (23)
 Make sure the spring pushes the plunger (21) easily and freely.

 S 213-015

 (24)
 Make sure the surface of knife assembly (20) which touches the diaphragm (18) is smooth, with no nicks or scratches.

 S 433-016

 (25)
 If the body (7) was removed, then do these steps:

 (a)
Install the O-ring (8) on the body (7).

 (b)
Install the body (7) on the pressure vessel (9).

 (c)
Tighten the body to 360-400 pound-inches.

 

 S 433-017
 (26)
 Install the diaphragm (18), with a new center section, in the body (7). Make sure the teflon side is in the direction of the pressure vessel.

 (27)
 Install the O-ring (19) on the knife assembly (20).

 (28)
 Install the knife assembly (20) in the body (7).
　
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