TM 5-3895-373-20 CHAPTER 14 BURNER MAINTENANCE Para Page General Maintenance Procedures.............................................................................................. 14.1 14-1 Replace Burner Chamber and Fuel Spray Nozzle ..................................................................... 14.5 14-27 Replace Burner and Fuel Spray Fuel Pump and Motor.............................................................. 14.2 14-2 Replace Burner Glow Plug ......................................................................................................... 14.7 14-57 Replace/Repair Blower Motor..................................................................................................... 14.8 14-59 Replace/Repair Burner and Fuel Spray Fuel Filter Assembly.................................................... 14.3 14-9 Replace/Repair Burner Fuel Solenoid Valve.............................................................................. 14.6 14-50 Replace Screed Fuel System Hoses and Fittings ...................................................................... 14.4 14-15 14.1. GENERAL MAINTENANCE PROCEDURES. All    unit     level     maintenance     shall     be     performed     in accordance with good and safe shop practices.  Observe the following general instructions and requirements when performing screed burner maintenance. a.      Areas   of   the   paving   machine   exposed   to paving material buildup require cleaning prior to disassembly.    Use  hammers,  chisels,  and  scrapers  to remove  thickest  sections  of  buildup.    If  available,  use heater  gun  to  soften  deposits  adhering  to  components; remove softened buildup with putty knife.  When heating paving material, keep second person with fire extinguisher  at  hand  and  avoid  overheating.    If  heater gun   is   not   available,   use   solvent   or   fuel   washdown system to soften paving material. b.  Thoroughly  clean  hoses  and  fittings  before disconnecting.      Always   plug   or   cap   off   disconnected fittings to prevent dirt and contaminants from entering the system.  Failure to clean hoses and fittings and to plug or cap open fittings may result in system contamination and equipment damage. c.      Always   tag   mating   connectors   and   fittings before disconnecting.  Tagging of mating connectors and fittings    will    ease    reassembly    and    reduce    assembly errors. d.      Use   a   backup   wrench   when   loosening   or tightening   inline   fittings.      Using   a   backup   wrench   will prevent  unnecessary  damage  to  attached  lines  and/or smaller fittings. e.    When  removing  tie  wraps  from  hoses  and wiring,  note  or  mark  locations  and  anchor  points.    The proper  location  and  installation  of  tie  wraps  will  prevent undue chafing of hoses and wiring. f.    Thread  locking  compound  is  used  with  most threaded fasteners.  If a threaded fastener will not break loose, heat threaded area of fastener from 500° to 600°F (232°  to  3150C)  with  heater  gun.    If  the  special  solvent used  to  remove  thread  locking  compound  from  screw threads fails to remove buildup, discard fastener. g.    Inspect  removed  components  for  wear  or damage.      Replace   damaged   parts.      Replace   used lockwashers,    selflocking    nuts,    seals,    gaskets,    and preformed packings. h.      Inspect   all   removed   fasteners   for   thread damage.    If  thread  damage  is  found,  replace  fastener. Replace   flat   washers   if   galled   or   bent.      Use   screw extractor  set  (Item  15,  Appendix  E)  to  remove  broken studs or screws. i.  Use only authorized replacement parts.  Refer to  TM  53895-373-24P,  Repair  Parts  and  Special  Tools List (RPSTL) for authorized replacement parts. j.      Torque   values   cited   in   the   text   apply   to modified  SAE  Grade  8  fasteners  at  required  clamping loads. k.    Observe  all  warnings  and  cautions.    Wear protective clothing and equipment as specified.  Observe the  Safety  and  Hazard  Warnings  provided  in  TACOM technical bulletin TB 43-0216. 14-1