TM 55-2815-574-24
0111
ASSEMBLE - Continued
NOTE
If shims were removed from the blower shafts, they should be replaced in their
original position on their respective shafts.
11.
Install a 0.140 in. thick gear spacer (Figure 20, Item 19) and the same thickness of shims (Figure 20, Item
18) on each rotor shaft (Figure 20, Item 11 and Figure 20, Item 12) that were removed at the time of
disassembly.
WARNING
Lubricating oil may cause irritation to eyes or skin. In case lubricating oil comes in contact
with eyes or skin, immediately flush eyes with water, wash skin with soap and water. Wear
protective goggles, gloves, and clothing. Failure to comply may result in personnel injury
or death.
12.
Lubricate the splines with light engine oil.
NOTE
Ensure the right gear is put back on the right rotor shaft and the left gear is put back on
the left rotor shaft.
13.
Install the rotor shaft gears (Figure 20, Item 15 and Figure 20, Item 16).
a. Mesh the gears (Figure 20, Item 15 and Figure 20, Item 16) so that the splines on the gears
match the splines on the rotor shafts (Figure 20, Item 11 and Figure 20, Item 12).
b. Start the gears (Figure 20, Item 15 and Figure 20, Item 16) on the rotor shafts (Figure 20, Item 11
and Figure 20, Item 12) at the same time so they are strait.
c.
Start bolts (Figure 20, Item 13) and large washers (Figure 20, Item 14) on the end of each rotor
shaft (Figure 20, Item 11 and Figure 20, Item 12).
d. Place a clean folded rag in the rotor lobes to prevent them from turning.
e. Tighten bolts slowly and at the same time to draw gears (Figure 20, Item 15 and Figure 20,
Item 16) down at the same time until they are tight against the spacers (Figure 20, Item 19),
shims (Figure 20, Item 18) and bearing races.
f.
Remove the two bolts and washers that were used to draw the gears (Figure 20, Item 15 and
Figure20, Item 16) down onto the rotor shafts (Figure 20, Item 11 and Figure 20, Item 12).
g. Lubricate the threads of the bolts (Figure 20, Item 13) and start on the rotor shafts (Figure 20,
Item 11 and Figure 20, Item 12) with 0.340 in. thick spacers (Figure 20, Item 14).
h. Using torque wrench, torque the bolts (Figure 20, Item 13) to 100 - 110 ft lbs (135.6 - 149.16
Nm).
i.
Remove the rag from the rotors.
NOTE
The positioning of the helix gears to obtain proper clearance is known as blower timing.
14. Time the blower.
