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Page Title: 21-13. ENGINE AFES TEST AND ALARM (T/A) PANEL REPLACEMENT
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TM 9-2350-287-20-2 21-13.    ENGINE AFES TEST AND ALARM (T/A) PANEL REPLACEMENT. This Task Covers: a.    Removal     b.    Installation Initial Setup: Tools/Test Equipment:              Lockwasher (9) (Item 196, Appendix H) General mechanic's tool kit (Item 24, Appendix H)     Equipment Conditions: Vehicle parked on level ground (refer Materials/Parts: to TM 9-2350-287-10). Lockwasher (2) (Item 136, Appendix H) Engine AFES deactivated (para 21-2). a. REMOVAL WARNING ·   Any automatic fire extinguishing system (AFES) unit in need of maintenance or repair is more prone to accidental discharge.  Accidental discharge could lead  to  frostbite  or  other  injury.    Small  parts  or  tools  become  dangerous projectiles when propelled by Halon discharging at 750 psi (5171 kPa).  Do not strike cylinder bottles with tools and do not drop cylinder bottles.  To prevent accidental discharge, be careful when handling cylinder bottles. ·   The   engine   AFES   is   designed   to   provide   from   two   to   four   hours   of   fire protection  AFTER  vehicle  shutdown.    Turning  off  the  MASTER  switch  does NOT  deactivate  the  AFES.    Working  on  the  AFES  when  the  system  is  active may cause serious injury to personnel. 1. Disconnect wiring harness plug (14) from engine AFES test and alarm (T/A) panel (13). 2. Remove four nuts (1), lockwashers (2), and screws (11), eight washers (3), and T/A panel (13) from bracket (4). Discard lockwashers. 3. Remove five screws (8), lockwashers (9), and washers (10) from bracket (4).  Discard lockwashers. 4. Remove screw (6), ground lead (5), two lockwashers (7), and bracket (4) from bracket (12).  Discard lockwashers. b. INSTALLATION 1. Install bracket (4) and ground lead (5) on bracket (12) with screw (6) and two new lockwashers (7). 2. Install five screws (8), new lockwashers (9), and washers (10) on bracket (4). 3. Install T/A panel (13) on bracket (4) with four screws (11), eight washers (3), and four new lockwashers (2) and nuts (1). 4.   Connect wiring harness plug (14) to engine T/A panel (13). Change 1  21-50

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