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Page Title: Figure 3-40. Blower Gears, Installation.
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TM 55-1930-208-24
3-19.
BLOWER - Continued.
f. Assembly - Continued.
(30) Refer to figure 3-40 and rotate the rotors so that missing serrations face the tip of the blower.
(31) Install the same number of shims (1) on each rotor as they were removed.
(32) Lubricate the serrations on the rotor shaft with lubricating oil (item 12, Appendix C).
(33) Place the teeth of the gears (2 and 3) in mesh so that the missing serrations inside the gears are
in alinement and facing the same direction as the missing serrations on the shafts.
(34) Start both rotor gears (2 and 3) on the rotor shafts with the right hand helix on the upper rotor and
the left hand helix gear on the lower rotor.
(35) Install the gear installers to both gears.
(36) Place a clean, soft cloth (item 23, Appendix C) between the rotors and between the rotors and
housing.
(37) Alternately tighten installers and press on the shaft at the same time until the gears are firmly
seated against the shims.
Figure 3-40. Blower Gears, Installation.
(38) Remove the gear installers.
(39) Install retainer (4), lockwasher (5), and bolt (6). Torque bolt to 55-65 lb-ft (75-88 Nm).
(40) Install drive coupling disc (7), lockwasher (8), and bolt (9). Torque bolt to 55-65 lb-ft (75-88 Nm).
(41) Remove the cloths from the blower.
(42) Refer to figure 3-41 and use a feeler gage and check dimensions "A" and "B" on both rotors and
all lobes.
3-68

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