DETROIT DIESEL
Preventive Maintenance
drive 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 (LBS/BELT)
Fan Drive
Generator Drive
Model
2 or 3
Single
Two 3/8" or
One " Belt
One 9/16"
belts
belt
" belts
belt
3,4-53
40-50
- 80-
40-50
50-70
40-50
6V-53
60-80
100
40-50
50-70
40-50
All
For 3-point or triangular drive use a tension of 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 accessory 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 3/4". If a belt tension gage such as
BT-33-73FA or equivalent is available, adjust the belt tension as outlined in the chart.
Item 21
Lubricate the overspeed governor, if it is equipped with a
hinge-type cap oiler or oil cup, with 5 or 6 drops of engine oil
every 500 hours. Avoid excessive lubrication and do not
lubricate the governor while the engine is running.
Item 22
If the fan bearing hub assembly is provided with a grease
fitting, use a hand grease gun and lubricate the bearings with
one shot of Texaco Premium RB grease, or an equivalent
Lithium base multi-purpose grease, every 20,000 miles
(approximately 700 hours).
Every 75,000 miles or 2500 hours, clean, inspect and repack
the fan bearing hub assembly with the above recommended
grease.
At a major engine overhaul, remove and discard the bearings
in the fan hub assembly. Pack the hub assembly, using new
bearings, with Texaco Premium RB grease or an equivalent
Lithium base multi-purpose grease.
Item 23
Check the shut-down system every 300 operating hours or
each month to be sure it will function when needed.
Item 24
On engines equipped with a Hydrostarter, refer to the Hydraulic
Starting System in the section on Engine Equipment for
preventive maintenance and lubrication.
Item 25
To clean either the hair or polyurethane type air compressor air
strainer element, saturate and squeeze it in fuel oil, or any
other cleaning agent that would not be detrimental to the
Item 20
element, until dirt free. Then dip it in lubricating oil and squeeze
it dry before placing it back in the air strainer. For replacement of the air strainer element, contact the nearest Bendix
Westinghouse dealer; replace with the polyurethane element, if available.
Item 26
There is no scheduled interval for performing an inspection on the Airesearch turbocharger. As long ask the turbocharger
is operating satisfactorily and there
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