TM 55-1560-307-13&P 3-23. FUEL FLOAT ASSEMBLY.  Replace. This task covers: a.  Removal. b.  Inspection. c.  Installation. INITIAL SETUP Tools:  3/4 and 1/4 in.  Wrench, 24 in. Adjustable Wrench, Putty Knife Steel Measuring Tape Materials/Parts: Packing Preformed (79, 80, Fig C-3), Appx C Float Switch (83, Fig C-2), Appx C Sealant (item 15, Appx D) MIL-S-8802E/3, Type II, Class B-2 Equipment Conditions: Refer to Figure 3-13. Tank must be empty and separate from other tanks. Tank access cover removed. Tank grounded. Tank must be purged.  Refer to Chapter 3, paragraph 3-25. GENERAL SAFETY INSTRUCTIONS WARNING Injury    to    personnel    and    equipment may occur if the purging maintenance procedure    above    is    not    performed. The  fuel  vapor  and  air  mixture  in  the tank   can   cause   a   violent   explosion setoff    by    sparks    from    tools    being dropped in tank. REMOVAL 1. Remove sealant with putty knife. 2. Remove tank plug (5) using adjustable wrench. 3. Disassemble  on  workbench.    Refer  to  Appx  C, Figure C-2. 4. Remove  nuts  (1),  washers  (2),  screws  (3)  from receptacle (4). 5. Remove nuts (6), bracket (7), and packing (8). 6. If defective, replace float switch (9) as follows: a. Unsolder wires from receptacle (4). b. Remove  float  switch  from  tubes  (10  &  11),  and remove packing (12). INSPECTION 1. Inspect electrical wire harness for frayed insulation, broken wires, or loose pin to wire connection. 2. Test float switch (9), replace if defective.  Refer to step (6) above. ASSEMBLY/ INSTALLATION 1. Install packing (12) on float switch (9), and guide electrical wires through tubes (10 & 11). 2. Install  nut  (6),  packing  (8),  plug  (5),  bracket  (7). Do  not  tighten  any  of  the  nuts  (6)  onto  plug  (5)  at  this time. 3. Solder   wires   to   receptacle   (4)   pins,   and   install screws (3), washers (2), and nuts (1). 4. Seal areas with sealant (item 15, Appx D). 5. Install assembled components in tank and tighten tank plug (5). 6. Adjust   tube   (10)   to   meet   2.5   inch   clearance between float (9) and bottom of tank. 7. Tighten nuts (6) after adjustment, and seal center of tube (10) and entire area around plug (5) with sealant (item 15, Appx D). 3-34