DETROIT DIESEL 53
Run-In Instructions 13.2.1
The lubricating oil temperature reading must be taken
manometer through a tube adaptor installed at the
while the engine is operating at full load and after it
tapped hole. If the exhaust manifold does not provide
has been operating long enough for the temperature to
a 1/8" pipe tapped hole, such a hole can be
stabilize. This temperature should be recorded and
incorporated by reworking the exhaust manifold.
should be within the specified range.
Install a fitting for a pressure gage or manometer in
The lubricating oil pressure should be recorded in psi
this hole. Care should be exercised so that the fitting
after being taken at engine speeds indicated in the
does not protrude into the stack. The manometer check
Operating Conditions, Section 13.2.
should produce a reading in inches that is below the
Maximum Exhaust Back Pressure for the engine (refer
The fuel oil pressure at the fuel manifold inlet passage
to Section 13.2).
should be recorded and should fall within the specified
range. Fuel pressure should be recorded at maximum
engine rpm during the Final Run-In.
Check the air box pressure while the engine is
operating at maximum speed and load. This check
may be made by attaching a suitable gage (0-15 psi)
or manometer (15-0-15) to an air box drain or to a
the full-load speed to be used during the Final Run-In.
hand hole plate prepared for this purpose. If an air
Apply the load thus determined to the dynamometer.
box drain is used as a source for this check, it must be
clean. The air box pressure should be recorded in
inches of mercury.
Check the crankcase pressure while the engine is
operating at maximum run-in speed. Attach a
manometer, calibrated to read in inches of water, to
the oil level dipstick opening. Normally, crankcase
pressure should decrease during the run-in indicating
that new rings are beginning to "seat-in".
When the above conditions have been met, adjust the
maximum no-load speed to conform with that
Check the air inlet restriction with a water manometer
specified for the particular engine. This speed may be
connected to a fitting in the air inlet ducting located
either higher or lower than the maximum speed used
2" above the air inlet housing. When practicability
during the Basic Run-In. This will ordinarily require a
prevents the insertion of a fitting at this point, the
manometer may he connected to a fitting installed in
the 1/4" pipe tapped hole in the engine air inlet
All information required in Section "E", Final Run-In,
housing. If a hole is not provided, a stock housing
of the Engine Test Report should he determined and
should be drilled, tapped and kept on hand for future
filled in. After the prescribed time for the Final Run-
In has elapsed, remove the load from the dynamome-
ter and reduce the engine speed gradually to idle
The restriction at this point should be checked at a
speed and then stop the engine. The Final Run-In is
specific engine speed. Then, the air cleaner and
ducting should be removed from the air inlet housing
and the engine again operated at the same speed while
noting the manometer reading. The difference between
F. INSPECTION AFTER FINAL RUN-IN
the two readings, with and without the air cleaner and
ducting, is the actual restriction caused by the air
After the Final Run-In and before the Engine Test
cleaner and ducting.
Report is completed, a final inspection must be made.
This inspection will provide final assurance that the
Check the normal air intake vacuum at various speeds
engine is in proper working order. During this
(at no-load) and compare the results with the Engine
inspection the engine is also made ready for any brief
Operating Conditions in section 13.2. Record these
delay in delivery or installation which may occur. This
readings on the Engine Test Report.
is accomplished by rust-proofing the fuel system as
outlined in Section 15.3. Also, a rust inhibitor should
Check the exhaust back pressure at the exhaust
manifold companion flange or within one inch of this
be introduced into the cooling system (refer to
location. This check should he made with a mercury
October, 1970 SEC. 13.2.1 Page 5