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TM 55-1905-219-14-10
5-8. BLOWER - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL - TIMING BLOWER ROTORS (Cont)
f.
Time the rotors as follows:
Time the rotors to have from .002" to .006" clearance
between the trailing edge of the right hand 'helix rotor
and the leading edge of the left hand helix rotor ("C" or
"CC" clearance) measured from both the inlet and
outlet sides as shown above and below. If possible,
keep this clearance to the minimum (.002").  Then,
check the clearance between the leading edge of the
right hand helix rotor and the trailing edge of the left
hand helix rotor ("C" clearance) for the minimum
clearance of (.012"). Rotor-to-rotor measurements
should be taken 1" from each end and at the center of
the blower.
NOTE
If the proper clearances cannot be obtained between the rotors, a mix of the
former and current rotors, which have a different helix angle, may have occurred.
5-253


 


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