DISASSEMBLY (CONT) - TM-3-4230-209-20-P0242

TM 3-4230-209-20&P

2-210

2-40. LOW PRESSURE HEATING BOILER ASSEMBLY (CONT).

ACTION

LOCATION/lTEM

REMARKS

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.