TM  5-4220-231-14&P
4-7     High    Pressure 
(HP)   or   Low   Pressure 
(LP)   Gage    Isolation 
Valve    (DACC).
This    task    covers: 
Replace
INITIAL   SETUP
Tools
Equipment 
Conditions
General 
Mechanics 
Tool    Kit
Remove 
front   cover     from   DACC    case     (Para. 
3-15    1-2)
O-ring    Installation 
and    Removal 
Tool
Remove 
rear    DACC    panel    (Para. 
3-15 
3)
Materials/Parts
Reference
Valve,     Ball   13229E4597-1
Para.     4-2,   General
O-ring,    M83248/2-010 
(2)
Silicone 
Compound 
(item   9,  Appendix 
D)
Nonionic 
Detergent 
Solution 
(NID)  GP
(Item    17,   Appendix 
D)
a. 
Remove
(1
Determine 
isolation 
valve 
to    be
removed.
(2)     Remove 
upper    tube    (6)   from   valve
GAGE 
ISOLATION
(4)   by   positioning 
a   wrench 
on   the
VALVE
union    nut   (5)  and   turning     clockwise.
Remove, 
cut,    and     discard 
O-ring
(7).
6
5,7
4
GE@ISOTIO*N
5,7
Change 1
4-19