TM 9-2330-246-14
4-64. PRESSURE TANK REPLACEMENT (Con't).
2.
Install pressure tank (4) on mounting bracket (1) using four screws (7), new Iockwashers (3), and nuts (2). Ensure
that pressure tank is installed with draincock (6) on bottom.
3.
Apply antiseizing tape to male threads and connect air tube (5) from relay valve to pressure tank (4).
4.
Close pressure tank draincock (6)
Perform leakage test (subpara c).
5.
c.
LEAKAGE TEST
NOTE
Draincock leakage caused by dirt can be corrected by cleaning the valve before
installation. Leakage caused by a damaged valve or body assembly requires
replacement of the draincock.
1.
With semitrailer brake system fully charged, coat draincock (6) and outside of pressure tank (4) with detergent
and water solution and inspect for leakage. No leakage is permissible.
2.
Tighten any leaking air line connection.
Inspect for damage or corrosion.
3.
4.
Replace pressure tank (4) if it leaks or if any damage or corrosion is found that would weaken pressure tank.
DRAINCOCK REPLACEMENT
d.
1.
Open draincock (6) to release air from brake system.
2.
Remove draincock (6) from pressure tank (4).
WARNING
Dry cleaning solvent, P-D-680, Is toxic and flammable. Always wear protective goggles
and gloves, and use only In a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flame or excessive heat.
The solvent's flash point is 100F-138F (38C-59C). If you become dizzy while
using cleaning solvent, Immediately get fresh air and medical help. If solvent contacts
eyes, Immediately wash your eyes and get medical aid.
3.
Clean draincock (6) with dry cleaning solvent and dry thoroughly.
4.
Inspect draincock (6) for damage or wear. Replace if damaged or worn.
5.
Wrap threads on draincock (6) with antiseizing tape.
CAUTION
Use caution not to bend the valve or damage draincock body.
Install draincock (6) into pressure tank (4).
6.
7.
Close draincock (6).
Perform leakage test (subpara c).
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8.
4-157