MODERN BURNER UNIT (MBU)
UNIT MAINTENANCE PROCEDURES
THIS SECTION COVERS:
Inspect, Repair, Replace
MBU disconnected from power source and cooled down
Tools and Special Tools
Shop Equipment Automotive Maintenance and Repair: Organizational Maintenance, Common No. 1
(WP 0038, Table 2, Item 2)
This procedure contains information and instructions to keep the MBU in good working order by
inspecting and replacing the controller hinge pins or the entire controller assembly, consisting of the
controller, control panel, controller harness, and hinge pins.
Two Person Lift
The MBU weighs approximately 58 pounds fully fueled (26.3 kg). Two persons must carry the
MBU when fully fueled, lifting with legs, not back, to prevent injury.
Inspect condition of controller assembly including the control panel, harness and connector housing, and
hinge pins for damage such as a broken or cracked housing, or loose, missing or bent hinge pins, frayed
insulation, loose or exposed wires or broken connector on harness.
Open hinged controller assembly (1).
Follow the cable harness (2) from the back of the controller assembly into the MBU. Note that the wires
exiting each connector are color coded. Disconnect the eight connectors (3) at the opposite end of the
harness. Remove green ground cable (7) and screw (8) from controller assembly (1)
To remove the hinge pins, proceed as follows:
Remove snap rings (4) from hinge pins (5) with flathead screwdriver and remove hinge pins from frame
Remove the entire controller assembly (1) from system.