rotors or between rotors and housing, the blower must
ance. A combination of gear and rotor shaft bearing
surface wear will result in a decrease of rotor to hous-
be removed "and parts dressed clown to eliminate the
interference or replaced.
(3) Seals are incorporated in each end of the
When inspecting the blower on an engine,
blower rotors and serve to prevent air leakage past the
with the engine running, keep your fingers
blower rotor shaft bearing surfaces, and to prevent oil
and clothing away from moving parts of the
blower and run the engine at low speed only.
from entering the rotor compartment.
b. Inspection (Blower Installed).
(3) Start engine and check for leaking oil seals.
Leaky oil seals are indicated by presence of oil on the
(1) Remove air inlet housing (para 3-13).
blower rotors or inside surfaces of the housing. Run
(2) Inspect the rotors for scratches, chips or other
the engine at low speed and direct a light into the rotor
abrasions. If burrs cause interference between the