3.1 Air Cleaner
DETROIT DIESEL 53
the removable screen and metal wool cleaning element.
The air leaves the cleaner through a tube at the side
and enters the blower.
The major portion of dirt is washed from the air as it
passes over the oil bath, and any remaining foreign
matter is removed as the air passes up through the
removable screen and the metal wool cleaning element.
Service the heavy-duty air cleaner as follows:
1. Remove the oil sump from the cleaner by loosening
the retaining band (or wing nuts). Empty the sump and
wash it with fuel oil to remove all of the sediment.
Fig. 1. - Light-Duty Oil Bath-Type Air Cleaner
2. Remove the detachable screen by loosening the
wing nuts and rotating the screen one-quarter turn.
3. Empty the sump, remove the baffle and clean both
the sump and the baffle with fuel oil to remove all
One of the most important steps in properly cleaning the
tray type oil bath air cleaner is a step that is most
overlooked. Unless the filter tray is thoroughly cleaned,
4. Push a lint-free cloth through the center tube to
satisfactory performance of any engine
remove dirt or oil from the walls.
5. Clean and check all gaskets and sealing surfaces to
insure air tight seals.
6. Refill the sump to the oil level mark ONLY, with the
same grade of oil used in the engine.
7. Before installing the air cleaner on the engine, check
the air inlet housing for dirt. If the service period has
been too long, or if dust-laden air has been leaking past
the air cleaner to the air inlet housing seals, the inlet will
be dirty. This will serve as a good check on the
servicing of the air cleaner. When installing the cleaner
(and its seal) on the inlet housing, be sure the cleaner
seats properly, then tighten the wingbolt securely until
the cleaner is rigidly mounted.
8. Install the baffle and reassemble the air cleaner.
Fig. 2.- Heavy-Duty Oil Bath-Type Air Cleaner
HEAVY-DUTY AIR CLEANER
The heavy-duty oil bath air cleaner (Fig. 2) consists of a
metal wool cleaning element supported inside a
housing, beneath which a removable screen and an oil
cup is located. Air, drawn into the air cleaner by the
blower, enters the cleaner at the air inlet hood, passes
down the central duct over the oil bath and up through
1970 General Motors Corp.