TM 3-4230-209-20&P
2-210
2-40. LOW PRESSURE HEATING BOILER ASSEM BLY (CONT).
ACTION
REMARKS
LOCATION/lTEM
DISASSEMBLY (CONT)
Low Pressure Heating Boiler
Assembly/
Unscrew and remove two hexagon plain nuts (15), two internal
Hexagon plain nuts (15)
tooth lock washers (16), and two machine screws (17).
Internal tooth lock
washers (16)
Machine screws (17)
Lift out spark arrester assembly (18).
Spark arrester
assembly (18)
Remove cover plate (if not already removed) to access the
Flame thermostatic
flame thermostatic switch (19).
switch (19)
Disconnect electrical wiring from flame thermostatic switch.
Unscrew and remove flame thermostatic switch (19).
Low Pressure Heating Boiler
Scrape excessive soot from inside combustor area walls. Clean soot from
combustor parts with dry cleaning solvent and a small brush. Be sure to
Assembly/All parts
wear protective gloves when using dry cleaning solvent.