TM 5-4320-300-146-4. BLOWER ASSEMBLY (CONT)Location/itemActionRemarks22 ClearanceAdjust clearance by moving one of theMove gears out/in bybetween rotorgears out/in on shaft and advancing/adding/removing gearassembliesretarding gear teeth relative to teeth onshims between gear hubother gear. Take measurements of clear-and gear spacers.ance the entire length of each rotorlobe and housing gap. A minimum clear-ance of 0.0075 inch (0.1905 mm) shouldexist at air inlet side, a minimum clear-ance of 0.004 inch (0.1016 mm) shouldexist at air outlet side, and a minimumclearance of 0.010 inch (0.254 mm)should exist between rotor assemblies.23. ClearanceMeasure. Clearance between front plate andbetween rotorrotor assemblies should be 0.006 inchassemblies and(0.1524 mm). Clearance between rear platefront and rearand rotor assemblies should be 0.008 inchplates(0.2032 mm).24. RotorTurn assemblies by hand to ensure theyassembliesmove freely. If assemblies do not turnfreely, check for presence of foreign mate-rial, and disassemble blower assembly ifnecessary.FINALASSEMBLY25. Cover plateInstall new gasket on front plate. Installcover plate, reinforcement plates, andbolts. Loosely retain bolts with nuts.26. Front andLoosely install.rear platebolts andwashers27. Housing as-Ensure surfaces are clean and free ofsembly andremaining gasket material.rear plategasketsurfaces6-11
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