MODERN BURNER UNIT (MBU)
CLEAN/REPLACE FUEL NOZZLE
THIS SECTION COVERS:
Clean as required, Replace (2000 Hours)
MBU shut-down and cool (WP 0005)
Drain Fuel Tank (WP 0011)
Rags (WP 0060, Table 1, Item 1)
Tools and Special Tools
Adjustable Wrench (WP 0038, Table 2, Item 1)
Clean/Replace Fuel Nozzle. Replace the nozzle every 2000 hours of operation or whenever
recommended as part of a troubleshooting procedure. Clean as necessary.
Do not attempt to connect a fuel line to the MBU in the vicinity of any open flame. Ensure that
the fuel hose connections are made properly to avoid fuel spillage. Prevent a possible fire
hazard by having rags on hand to absorb any spillage.
Do not attempt service procedures on a burner that has recently been in operation. Let the
burner cool down before performing these procedures to avoid the possibility of serious burns.
Open control panel (1) to gain access to fuel delivery block (2).
Remove 2 hex nuts and washers (3) securing fuel delivery block (2) to the burner tube
Move fuel delivery block (2) out of the way to gain access to the nozzle (5).
If cleaning, wipe the nozzle (5) to remove any accumulated residue.