TM 9-4520-257-12&P 0021 00
0021 00-3
INSPECT
1. Inspect the burner shell assembly (3) for carbon buildup, distortions, warping of metal, or other
damage. Notify unit maintenance if the burner shell assembly (3) is damaged.
2. Inspect the perforations (5) in the wall of the burner shell assembly (3) for carbon or soot buildup that
obstructs airflow.
3. Inspect the burner base up tube (6) and the interior of the burner cap assembly (12) for carbon or
soot buildup.
SERVICE
CAUTION
Do not enlarge perforations in the burner shell assembly when cleaning.
Increased airflow will degrade burner performance.
CAUTION
Be sure to drain any fuel that may remain in the up tube after removing
the burner shell assembly.
1. Clean the burner shell assembly (3) as necessary to remove carbon and soot buildup.
2. Clean perforations (5) in the burner shell assembly (3) with a stiff bristle brush.
3. Clean the burner base up tube (6) and the interior of the burner cap assembly (12) with the burner
reaming tool (7) by moving the tool (7) in and out of the up tube (6) and burner cap assembly (12)
while twisting the tool (7).
4. Turn the burner shell assembly (3) upside down to empty the scraped off carbon.
REPLACE
1. Replace the burner shell assembly (3) if damaged.
2. Replace the burner cap assembly (12) if damaged.
INSTALL
1. Place the burner shell assembly (3) inside the heater body base (4) and position the burner shell
assembly (3) so that the pipe nipple (8) protrudes through the door opening (9) next to the fuel flow
control bracket (10).
2. Connect the flow control burner hose assembly (1) to the fuel flow control valve (2).
3. Install the superheater assembly (11).
4. Install the burner cap assembly (12).
