Engine Systems
DETROIT DIESEL
clean tray is held up to the light, an even pattern of
light should be visible. It may be necessary, only as a
last resort, to burn off the lint. Extreme care must be
taken to prevent melting the galvanized coating in the
tray screens. Some trays have equally spaced holes in
the retaining baffle. Check to make sure that they are
clean and open. Figure 11 illustrates a thoroughly
cleaned tray. The dark spots in the mesh indicate the
close overlapping of the mesh and emphasize the need
for using compressed air or steam. It is suggested that
users of heavy-duty air cleaners have a spare tray on
hand to replace the tray that requires cleaning. Having
an extra tray available makes for better service and
t h e d i r t y t r a y c a n be cleaned thoroughly as
recommended. Spare trays are well worth their
investment.
3. Pour out the oil, separate the inner cup or baffle
from the oil or outer cup, remove the sludge and wipe
the baffle and outer cup clean.
4. Clean and inspect the gaskets and sealing surfaces
to ensure an air tight seal.
Fig. 11 - Air Cleaner Tray (Clean)
5. Reinstall the baffle in the oil cup and refill to the
proper oil level with the same grade of oil being used
and center tube each time the oil cup is serviced. If
in the engine.
there are any indications of plugging, the body
assembly should be removed from the engine and
6. Remove the hood and clean by brushing, or by
cleaned by soaking and then flushing with clean fuel
blowing out with compressed air. Push a lint-free cloth
oil. Allow the unit to drain thoroughly.
through the center tube to remove dirt or oil from the
walls.
8. Place the removable element in the body assembly.
Install the body if it was removed from the engine for
7. Inspect the lower portion of the air cleaner body
servicing.
9. Install the outer cup and baffle assembly. Be sure the
cup is tightly secured to the body assembly.
All oil bath air cleaners should be serviced as
operating conditions warrant. At no time should more
than 1/2" of "sludge" be allowed to form in the oil
cup or the area used for sludge deposit, nor should the
oil cup be filled above the oil level mark.
The United Specialties dry-type air cleaner shown in
Fig. 12 consists of a body, dust unloader and element
clamped to a base.
Air is drawn through the cleaner intake pipe and is
automatically set into a circular motion. This positive
spinning of the dirty air "throws out" the heavier
particles of dust and dirt where they are collected in
the dust port and then expelled through the dust
unloader. The circular action continues even during
low air intake at engine idle speeds.
Fig. 10- Air Cleaner Tray (Plugged)
The United Specialties dry-type air cleaner should be
serviced, as operating conditions warrant, as follows:
Page 19
