TM 5-4220-225-14
Table 4-1. Unit Troubleshooting Procedures (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
19.
RELIEF VALVE WILL NOT RESEAT.
Step 1.
Check for foreign matter.
Clean and retest.
Step 2.
Substitute new valve.
Replace and retest (para. 4-21).
Step 3.
Adjust valve to proper relieving pressure.
Adjust as necessary and retest (para. 2-8).
SECTION V. UNIT MAINTENANCE PROCEDURES
Paragraph
Page
4-11
General................................ ................................ ................................ ................................ ........ 4-13
4-12
Diver's Coveralls ................................ ................................ ................................ .......................... 4-14
4-13
Diver's Drysuit................................ ................................ ................................ .............................. 4-16
4-14
Boots ................................ ................................ ................................ ................................ ........... 4-20
4-15
Diver's Mittens ................................ ................................ ................................ ............................. 4-24
4-16
Diver's Harness................................ ................................ ................................ ............................ 4-26
4-17
Helmet Base Breech Ring................................ ................................ ................................ ............ 4-28
4-18
Lower Breech Ring Assembly................................ ................................ ................................ ....... 4-30
4-19
Air Supply Adapter ................................ ................................ ................................ ....................... 4-32
4-20
Air Supply Tube ................................ ................................ ................................ ........................... 4-36
4-21
Air Supply Valve ................................ ................................ ................................ .......................... 4-38
4-22
Diffuser Assembly ................................ ................................ ................................ ........................ 4-42
4-23
Adjustable Exhaust Valve Assembly ................................ ................................ ............................ 4-44
4-24
Ambient Exhaust Valve................................ ................................ ................................ ................ 4-48
4-25
Helmet Lug ................................ ................................ ................................ ................................ .. 4-52
4-26
Helmet Communications ................................ ................................ ................................ .............. 4-58
4-27
Communications Whip ................................ ................................ ................................ ................. 4-68
4-28
Helmet Liner ................................ ................................ ................................ ................................ 4-70
4-29
Helmet Ducts ................................ ................................ ................................ ............................... 4-72
4-30
Air Supply Whip ................................ ................................ ................................ ........................... 4-76
4-31
Umbilical ................................ ................................ ................................ ................................ ...... 4-78
4-32
Communications Box ................................ ................................ ................................ ................... 4-82
4-12
