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 TM 55-1905-219-14-11
5-71. .BLOWER - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL-ASSEMBLY (Cont)
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 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.
g. After determining the amount one Rotor must be
revolved to obtain the proper clearance, add
shims back to the proper gear as shown below to
produce the desired result. When more or less
shims are required, both gears must be removed
from the rotors. Placing a .003" shim in back of a
rotor gear will revolve the rotor .001".
5-1008
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