4-83. PILOT VALVE MAINTENANCE.
Cleaning and Inspection
General Safety Instructions:
Dry cleaning solvent is flammable and must
not be used near open flame. Use only in a
4-70 Jet level sensor tubing
disconnected from pilot valve.
Compressed air used for drying or testing
purposes must not exceed 30 psi
One preformed packing
One retaining ring
Tool kit, general mechanic's
Remove pilot valve (1) from emergency valve (13). Remove preformed packing (12) and discard.
Remove six lockscrews (4) and washers (5).
Place access cover (2) in a vise. Tap on valve flange (10) and remove access cover and
diaphragm (6) from valve flange.
Remove retaining ring (7) and discard.
Remove valve disk (11), washer (8), and spring (9).