MODERN BURNER UNIT (MBU)
UNIT MAINTENANCE PROCEDURES
Disconnect compressor power wire harness connector (1).
Different Hose Sizes
The Air Compressor has two different size hose fittings that accommodate two different size
neoprene air hoses. Note that the upper fitting requires a 3/8 inch ID neoprene hose and that
the lower fitting requires a ¼ in ID neoprene air hose.
Disconnect air lines (2) from compressor (3).
To remove compressor (3) ONLY, loosen and remove two hose clamps (4) and lift compressor (3) off the
mounting plate (5).
To ALSO replace the compressor mounting plate (5), remove 4 self locking nuts and washers (6)
securing plate (5) to the threaded studs mounted to the MBU base plate (7).
Slide new vibration grommets (8) onto mounting plate (7), insert spacers, and secure assembly with four
self locking nuts and washers (6) to the threaded studs mounted to the MBU base plate (7).
Place new compressor onto mounting plate (5) and secure with two hose clamps (4). Connect air lines (2)
previously removed. Note that the 3/8 ID hose installs on the larger fitting.
Connect compressor power wire harness connector (1).