OVERHAUL - TIMING BLOWER ROTORS (Cont) - TM-55-1905-220-14-100590

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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

5-35. BLOWER - MAINTENANCE INSTRUCTIONS (Continued).

LOCATION

ITEM

ACTION

REMARKS

OVERHAUL - TIMING BLOWER ROTORS (Cont)

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 re-

volved to obtain the proper clearance, add shims

back of the proper gear as shown below to pro-

duce the desired result. When more or less shims

are required, both gears must be removed from

the rotors. Placing a .003 inch shim in back of

a rotor gear will revolve the rotor .001 inch.

h. Install the required thickness of shims in back of

the proper gear and next to the bearing inner race

and reinstall both gears. Recheck the clearances

between the rotor lobes.

Determine the minimum clearances at points "A"

and "B". Insert the feeler gages, between the end

plates and the ends of the rotors. This operation

must be performed at the ends of each lobe, making

12 measurements in all. See below for the mini-

mum clearances.

5-590