TM 10-7310-281-13&PMODERN BURNER UNIT (MBU)0023 00UNIT MAINTENANCE PROCEDURES0023 00-16Replacing Entire Fuel Delivery Block Assembly. Remove Fuel Delivery Block (1)from the burner tubemounting shafts as described earlier. To replace the entire fuel delivery block assembly (1), disconnectthe 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 thecontrol 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 andwashers (15,16).Replacement of Entire Fuel Delivery Block AssemblyEND OF WORKPACKAGE12356781113914151610124
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