TM 5-4520-241-14
CHAPTER 9
REPAIR OF BURNER ASSEMBLY
9-1.
DESCRIPTION.
The burner assembly provides a steady supply of combustion air to the burner head. It also provides a chamber for
the mixing and combustion of fuel and air.
9-2.
REPAIR.
a. Disassembly.
(1) Disconnect the power plug and open the access doors. Disconnect the ignition cable from the igniter (1,
fig. 9-1), and remove the igniter from the burner head.
(2) Disconnect the fuel lines at the elbows on the carburetor. Remove the screws securing the carburetor to the
burner bead. Pull off the carburetor and move it out of the way.
(3) Remove hose clamps (2) and pull air duct (3) off the burner head.
(4) Remove the five screws (4) and pressure pads (5) which fasten the burner head to the heat exchanger. Pry
off gasket (6) from burner head (7).
b. Cleaning and Inspection.
(1) Clean the burner by using a wire brush to remove combustion deposits. Clean out all deposits and debris
clogging the combustion air inlet or igniter hole.
(2) Inspect all internal baffles in the burner head. Replace the burner head if any baffle is loose or eroded. Minor
dents may be straightened, but the burner head must be replaced if there are any cracks or holes, or if there are sizable
areas of corrosion.
(3) Discard and replace the burner head gasket. If the air duct is punctured or torn, replace it.
c. Assembly. Assemble in reverse order of disassembly.
9-1
