4-51. FRONT SUCTION VALVE-Continued
Turn shaft (11) until indicator (3) is at closed position.
Turn in limit stop screw (19), located on the shaft side of the housing, until it bottoms outs.
Turn shaft (11) until indicator (3) is at open position. Turn in other limit stop screw (19) until it
Install two limit stop locking screws (18).
e. Disassembly - Valve.
Remove six screws (20), lockwashers (21) and nuts (22).
Remove inlet section (23) and outlet section (24).
Remove two screws (25) and 0-rings (26). Discard 0-rings.
Remove shaft (27), disk (28), bushing (29) and seal (30). Discard seal.
Remove seat (31) from housing (32).
Cleaning and Inspection - Valve.
Dry cleaning solvent P-D-680 is potentially dangerous. Avoid
repeated and prolonged breathing of vapors and skin contact
with the liquid. Do not use near open flame, arcing equipment
or other ignition sources. Always wear eye protection and
protective clothing. The flash point of P-D-680 is 100 to 138
deg. F (38 to 59 deg. C).
Death or serious injury could occur if compressed air is directed
against the skin. Do not use compressed air for cleaning or
drying unless the pressure is/has been reduced to 30 psi (2.11
kg/cm2) or less. When working with compressed air, always use
chip guards, eye protection, and other personal protective
Clean all parts using cleaning solvent P-D-680; dry using compressed air.
Check housing (32) and disk (28) for cracks or breaks. Replace part if any of these conditions
Inspect seat (3) for wear or damage. Replace if required.
Inspect bushing (29) for wear or damage. Replace if worn or damaged.
Inspect shaft (27) for bends, deep grooves or scoring. Replace if damaged in any way.