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 TM 55-1905-219-14-10
5-7. 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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