TM 5-4320-300-14
6-4. BLOWER ASSEMBLY (CONT)
Location/item
Action
Remarks
22 Clearance
Adjust clearance by moving one of the
Move gears out/in by
between rotor
gears out/in on shaft and advancing/
adding/removing gear
assemblies
retarding gear teeth relative to teeth on
shims between gear hub
other gear. Take measurements of clear-
and gear spacers.
ance the entire length of each rotor
lobe and housing gap. A minimum clear-
ance of 0.0075 inch (0.1905 mm) should
exist at air inlet side, a minimum clear-
ance of 0.004 inch (0.1016 mm) should
exist at air outlet side, and a minimum
clearance of 0.010 inch (0.254 mm)
should exist between rotor assemblies.
23. Clearance
Measure. Clearance between front plate and
between rotor
rotor assemblies should be 0.006 inch
assemblies and
(0.1524 mm). Clearance between rear plate
front and rear
and rotor assemblies should be 0.008 inch
plates
(0.2032 mm).
24. Rotor
Turn assemblies by hand to ensure they
assemblies
move freely. If assemblies do not turn
freely, check for presence of foreign mate-
rial, and disassemble blower assembly if
necessary.
FINAL
ASSEMBLY
25. Cover plate
Install new gasket on front plate. Install
cover plate, reinforcement plates, and
bolts. Loosely retain bolts with nuts.
26. Front and
Loosely install.
rear plate
bolts and
washers
27. Housing as-
Ensure surfaces are clean and free of
sembly and
remaining gasket material.
rear plate
gasket
surfaces
6-11
