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TM 55-1905-220-14-10
5-8. BLOWER-MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL-ASSEMBLY (Cont)
OVERHAUL-TIMING BLOWER ROTORS
9. Blower
a. After the blower rotors and timing
gears are installed, the blower
rotors must be timed.
NOTE
Before timing the blower, install four 5/16"-18 X 1-7/8" bolts with flat washers through four bolt
holes in each end plate (top and bottom) and thread them into the blower housing. Tighten the
bolts to 13-17 lb-ft (17.6-23.0 Nm) torque. This will hold the end plates against the blower housing
so the proper clearance between the rotors and the end plate can be obtained.
b. The blower rotors, when properly
positioned in the housing, run with
a slight clearance between the
lobes. This clearance may be varied
by moving one of the helical gears
in or out on the shaft relative to
the other gear.
5-251


 


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