4-47.2. BUTTERFLY VALVES, MANUAL. This task consists of:: (MODEL ROWPU-1 ONLY)
Tools, see Appx B, Sec III, Ref Code (No.):
Tool Kit, General Mechanics Automotive (1)
ROWPU shutdown when replacing unit.
General Safety Instructions:
Observe specific Warning in the text.
Remove manual butterfly valve from system (para. 4-45).
(Refer to Figure 4-53.3.) Loosen set screw (1) and remove handle (2) and backing plate (3).
Remove four screws (4) and nuts (5) from butterfly valve.
Separate two valve halves (6) of the butterfly valve and remove two bushings (7) and the disc and seat assembly.
Remove seat (8) from disc (9).
Repair is limited to replacement of defective or damaged components.
Install disc (9) into seat (8).
Place disc and seat assembly into valve halves (6) with two bushings (7) and place disc into open position.
Install four nuts (5) and four screws (4).
Install backing plate (3), handle (2), and set screw (1).
Install butterfly valve into system (para. 4-45).
Change 7 4-202.5