OVERHAUL-TIMING BLOWER ROTORS (cont) - TM-55-1905-220-14-100258

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OVERHAUL-TIMING BLOWER ROTORS (cont)

TM-55-1905-220-14-10 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

OVERHAUL-TIMING BLOWER ROTORS (cont)

TM 55-1905-220-14-10

5-8. BLOWER-MAINTENANCE INSTRUCTIONS (Continued).

LOCATION

ITEM

ACTION

REMARKS

OVERHAUL-TIMING BLOWER ROTORS (Cont)

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