TM 10-7310-281-13&P
MODERN BURNER UNIT (MBU)
0023 00
UNIT MAINTENANCE PROCEDURES
0023 00-16
Replacing Entire Fuel Delivery Block Assembly. Remove Fuel Delivery Block (1) from the burner tube
mounting shafts as described earlier. To replace the entire fuel delivery block assembly (1), disconnect
the fuel line (2), fuel feeder line (3) and air hoses (4,5) from the fuel delivery block assembly (1).
Disconnect the air/fill solenoid harness connector (6) and the fuel shut-off solenoid harness connector (7).
Disconnect the flame sensor harness connector (8). Disconnect the Feedback Pot connector (9).
Disconnect the Ignitor Assembly (10). Remove the Control Knob (11) and the Ground Wire (12).
Remove the fuel delivery block assembly from the MBU frame (13).
To install the new fuel delivery block assembly (1), place the assembly in the MBU frame (13) with the
control knob (11) facing toward the front of the MBU.
Connect the fuel line (2), fuel feeder line (3) and air hoses (4,5) to the fuel delivery block assembly (1).
Note that neoprene hoses are two sizes (WP 0054). Install correct size hose on correct size fitting.
Connect the air/fill solenoid harness connector (6) and the fuel shut-off solenoid harness connector (7).
Connect the flame sensor harness connector (8). Install the Ground Wire (12).
Reinstall the fuel delivery block assembly (1) onto the burner tube mounting shafts.
Secure the fuel delivery block assembly (1) to the burner assembly (14) using two self locking nuts and
washers (15,16).
Replacement of Entire Fuel Delivery Block Assembly
END OF WORKPACKAGE
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