Preventive
Maintenance
DETROIT DIESEL
belts every 200 hours or 6,000 miles and adjust, if
necessary. Too tight a belt is destructive to the
bearings of the driven part; a loose belt will slip.
BELT TENSION CHART (Ibs/belt)
USe
a tension of
For 3-point or triangular drive
90-120.
Replace all belts in a set when one is worn. Single belts
of similar size should not be used as a substitute for a
matched belt set; premature belt wear can result
because of belt length variation. All belts in a matched
set are within .032" of their specified center distances.
NOTE: When installing or adjusting an acces-
sory drive belt, be sure the bolt at the accessory
adjusting pivot point is properly tightened, as
well as the bolt in the adjusting slot.
Adjust the belt tension so that a firm push with the
thumb, at a point midway between the two pulleys,
will depress the belt 1/2" to ". If a belt tension
gage such as BT-33-73FA or equivalent is available,
Item 20
adjust the belt tension as outlined in the chart.
Item 23
Check the shutdown system every 300 operating hours
Item 21
or each month to be sure it will function when needed.
Lubricate the overspeed governor, if it is equipped
Item 24
with a hinge-type cap oiler or oil cup, with 5 or 6
drops of engine oil every 500 hours. Avoid excessive
On engines equipped with a Hydrostarter, refer to the
lubrication and do not lubricate the governor while the
Hydraulic Starting System in the section on Engine
engine is running.
f o r preventive maintenance and
Equipment
lubrication.
Item 22
Item 25
If the fan bearing hub assembly is provided with a
To clean either the hair or polyurethane type air
grease fitting, use a hand grease gun and lubricate the
compressor air strainer element, saturate and squeeze
bearings with one shot of Texaco Premium RB grease,
it in fuel oil, or any other cleaning agent that would
or an equivalent Lithium base multi-purpose grease,
not be detrimental to the element, until dirt free. Then
every 20,000 miles (approximately 700 hours).
dip it in lubricating oil and squeeze it dry before
placing it back in the air strainer.
Every 75,000 miles or 2500 hours, clean, inspect and
repack the fan bearing hub assembly with the above
For replacement of the air strainer element, contact
recommended grease.
the nearest Bendix Westinghouse dealer; replace with
the polyurethane element, if available.
At a major engine overhaul, remove and discard the
Item 26
bearings in the fan hub assembly. Pack the hub
assembly, using n e w bearings, with Texaco
There is no scheduled interval for performing an
Premium RB grease or an equivalent Lithium base
inspection on the Airesearch turbocharger. As long as
the turbocharger is operating satisfactorily and there
multi-purpose grease.
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