Inspect the rotor shaft splines (Figure 9, Item 1) for burrs, peening or wear. Use abrasive cloth
to remove burrs or peening. Replace rotors if worn.
Inspect the rotor shaft seal and bearing surfaces (Figure 9, Item 1) for wear or scoring. Use
abrasive cloth to remove burrs or scoring. Replace rotor shaft seals and bearings if worn.
Inspect the inside surface of the blower housing (Figure 7, Item 2) for burrs or scoring. If
the inside surface is burred or scored, use abrasive cloth to remove burrs or scoring.
Inspect the finished end plates of the blower housing (Figure 7, Item 2) for flatness and burrs.
Ensure that the end plate is set flat against the blower housing.
Ensure that the finished inside face of each end plate is smooth and flat. If the
finished face is slightly scored or burred, use abrasive cloth to remove burrs or scoring.
Inspect the dowel pins to ensure they protrude 0.320 in. from the flat inner face of the
end plate (Figure 7, Item 2 and Figure 7, Item 3). Replace as necessary.
Examine the blower timing gears (Figure 2, Item 3 and Figure 2, Item 8).
Check timing gears for wear or peening. Use abrasive cloth to remove peening.
Replace timing gears if worn.
If required, timing gears are replaced as a set.
Check timing gears for cracks, chipped teeth or other damage. Replace as necessary.
Check blower drive shaft splines (Figure 9, Item 1) for wear or peening. Replace shaft if it is bent, cracked
or has spline wear.
END OF TASK
Lip type oil seal will be used under normal circumstances. However if the rotor
shaft seal surface is pitted or worn the oversize double lip type oil seal will be
Do not lubricate the seals, spacers or the blower rotor shaft prior to installing.
Teflon lip seals must be installed dry. This allows transfer of teflon to all surfaces
for proper sealing.
Double lip teflon seals are packaged around a plastic sleeve which should not be
removed prior to installation. The sleeve protects the seal lips during shipment and
acts as a seal expander during blower assembly.
Install the new lip type oil seals (Figure 10, Item 3).