BUTTERFLY VALVES WITH VALVE ACTUATORS. This task covers: (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:
Tape, Antiseize (Appx E, Sec II, Item 67)
Lockwashers (CM 10-4610-232-24P)
Washers (TM 10-4610-232-24P)
Observe specific Warning in the text.
DISASSEMBLY - BUTTERFLY VALVE.
(Refer to Figure 4-53.1). Remove two screws (1) from actuator (2).
Remove set screw (3) and position indicator (4) from actuator (2).
Remove actuator (2) from mounting bracket (7) and butterfly valve.
Remove four screws (5), four nuts (6), and mounting bracket (7) from butterfly valve.
Separate two valve halves (8) of the butterfly valve and remove two bushings (9) and the disc and seat assembly.
Remove seat (10) from disc (11).
REPAIR - BUTTERFLY VALVE.
Repair is limited to replacement of defective or damaged components.
ASSEMBLY - BUTTERFLY VALVE.
Install disc (11) into seat (10).
Place disc and seat assembly into valve halves (8) with two bushings (9) and place disc into open position.
Install mounting bracket (7), four nuts (6), and four screws (5).
Place position indicator (4) onto bottom of actuator (2) and place actuator into position on mounting bracket (7).
Install two screws (1) into actuator (2).
Place position indicator (4) into open position and install set screw (3). Open position for position indicator is with
the point of indicator sticking out of slot in mounting bracket (7) and in line with disc (11) in butterfly valve.
DISASSEMBLY - CONTROL TOP.
Tag and mark all wiring.
Remove water injector (2A).
(Refer to Figure 4-53.2). Remove four screws (1), cover (2), and gasket (3).
Change 7 4-202.1