M978 Tanker Maintenance Procedure
Adhesives, solvents, and sealing compounds can burn easily, can give off harmful
vapors, and are harmful to skin and clothing. To avoid injury or death, keep away
from open fire and use in well-ventilated area. If adhesive, solvent, or sealing
compound gets on skin or clothing, wash immediately with soap and water.
Clean all glass and metal parts in dry cleaning solvent.
Wipe rubber parts with clean cloth.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use
only with effective chip guarding and personal protective equipment, goggles,
shield, and gloves.
Dry metal parts with compressed air.
Inspect threaded parts for stripping or cross threading. Replace damaged or worn parts.
Inspect rubber parts. Replace damaged parts.
Inspect stems, seats, and washers for scoring, deposits, chips, nicks, or burrs. Remove deposits,
chips, nicks, or burrs.
Inspect strainer screen for deposits and holes. Replace damaged screen.
Inspect housings, bodies, and covers for cracks and deposits. Remove deposits, replace damaged
housings, bodies, and covers.
(1) Install disc (1), two washers (2), and guide (3) in seat (4).
(2) Install seat (4), diaphragm (5), washer (6), and nut (7) on stem (8).