DETROIT DIESEL 53
3.4
BLOWER
ENGINES
IN-LINE
The blower supplies the fresh air required for
combustion and scavenging. Its operation is similar to
that of a gear-type oil pump Two hollow double-lobe
rotors revolve in a housing bolted to the side of the in-
line engines (Fig. 1)
The revolving motion of the rotors provides a
continuous and uniform displacement of air.
The blower rotors are pinned to the rotor shafts. The
rotor shafts are steel and the blower end plates are
aluminum. providing for a compatible bearing
arrangement.
Gears located on the splined end of the rotor shafts
space the rotor lobes with a close tolerance. Since the
lobes of the two rotors do not touch at any time, no
lubrication is required.
Inspect glower (Attached to Engine)
Lip type oil seals are used in both the front and rear
end plates on current engines. The seals prevent air
The blower may be inspected without removing it
leakage past the blower rotor shaft bearing surfaces
and also keep the oil, used for lubricating the blower
from the engine. However, the air cleaner and the air
rotor gears, from entering the rotor compartment.
inlet housing must be removed.
Former blowers used a ring type oil seal consisting of
a fiber washer, "0" ring, retainer and seal spring in
CAUTION: When inspecting the blower with the
each end of the blower rotors.
engine running, keep your fingers and clothing
away from the moving parts of the blower and
run the engine at low speeds only.
Fig. 1 - Blower Mounting (3.53 Engine)
July, 1972
SEC. 3.4 Page 1
