TM 9-2320-279-34-3
M978 Tanker Maintenance Procedures Instructions (Cent)
22-19. V12 BOTTOM LOAD PRECHECK VALVE AND SAMPLING PROBE VALVE REPAIR
(CONT).
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(5) Remove seat (15), ball (16), and seat (17) from valve
body (l).
b. Cleaning/Inspection.
WARNING
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.
(7,) Clean all metal parts with dry cleaning solvent.
WARNING
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.
(2) Dry metal parts with compressed air.
(3) Inspect each part for damage.
(4) Replace damaged parts.
c. Assembly.
N
NOTE
V12 bottom load precheck valve and sampling probe
valve are assembled the same way.
(1) Lubricate seat (1) with oil.
(2) Install seat (l), bevel edge facing out, in valve
body (2).
(3) Lubricate ball (3) with oil and install in valve
body (2).
(4) Lubricate seal (4) with oil and install in stem (5).
(5) Install stem (5). Turn stem and rotate ball (3) to closed
(6) Lubricate seat (6) with oil and install in valve body (2)
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TA1 90705
position
so bevel“edge is toward ball (3).
CAUTION
Ball is loose inside valve body and can slide out of position. When
handling valve body, avoid misalinement of or damage to valve.
(7) Lubricate seal (7) with oil and install on end cap (8).
WARNING
Adhesives, solvents, and sealing compounds can burn easily, can give off harmful
va~ors, and are harmful to skin and clothing. To avoid injury or death, keep away
l
fr;m 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.
(8) Apply pipe thread sealing compound on threads of end cap (8) and install in valve body (2).
o
22-92
