DETROIT DIESEL 53
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 on top of the cylinder
block between the cylinder banks on the 6V engine (Fig.
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
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
Fig. 1.- Blower Mounting (6V-53 Engine)
lubrication is required.
Inspect Blower (Attached to Engine)
Lip type oil seals are used in both the front and rear end
plates. The seals prevent air leakage past the blower
The blower may be inspected without removing it from
rotor shaft bearing surfaces and also keep the oil, used
the engine. However, the air cleaner and the air inlet
for lubricating the blower rotor gears, from entering the
housing must be removed.
CAUTION When inspecting the
the engine running, keep your
clothing away from the moving
parts of the
blower and run the engine at
Fig. 3. - Removing/installing Blower Drive Support (6V-
1972 General Motors Corp
SEC. 3.4 Page 1