TM 5-3810-300-24&P-3
15.1 Preventive Maintenance
fuel pressure at the cylinder head fuel inlet manifold and
the inlet restriction at the fuel pump. In a clean system,
NOTE: When installing or adjusting an
the maximum pump inlet restriction must not exceed 6
accessory drive belt(s), be sure the bolt
inches of mercury. At normal operating speeds, the fuel
at the accessory adjusting pivot point is
pressure is 45 to 70 psi. Change the fuel filter elements
properly tightened, as well as the bolt in
whenever the inlet restriction (suction) at the fuel pump
the adjusting slot.
reaches 12 inches of mercury at normal operating
speeds and whenever the fuel pressure at the inlet
Adjust the belt tension so that a firm push with the
manifold falls to 45 psi.
thumb, at a point midway between the two pulleys, will
depress the belt 1/2" to 3/4" . If belt tension gage BT-33-
12. Air Cleaner (Dry)
73FA, or equivalent, is available, adjust the belt tension
as outlined in the chart.
Inspect and service the air cleaner element every 20,000
miles, or more often if the engine is operated under
10. Air Compressor
severe dust conditions.
Check the gaskets for
deterioration and replace, if necessary. If the dry type air
Remove and clean all air compressor air intake parts. To
cleaner is equipped with an aspirator, check for aspirator
clean either the hair or polyurethane type element,
damage or clogging. Clean and repair as necessary.
saturate and squeeze it in fuel oil, or any other cleaning
agent that would not be detrimental to the element, until
Under no engine operating conditions should the air inlet
dirt free. Then dip in lubricating oil and squeeze dry
restriction exceed 25 inches of water for non-
before placing the element back in the air strainer.
turbocharged engines or 20 inches of water for
turbocharged engines. A clogged air cleaner element
For replacement of the air strainer element, contact the
will cause excessive intake restriction and a reduced air
nearest Bendix Westinghouse dealer; replace with the
supply to the engine.
polyurethane element, if available.
13. Coolant Filter
11. Fuel Filters
Replace the coolant filter element. Select the proper
Install new elements in the strainer and the filter at the
coolant
filter element
in accordance with the
intervals shown in the chart, or when plugging is
instructions given under Engine Coolant in Section 13.3.
indicated.
Use a new filter cover gasket when
A method of determining when elements are plugged to
the extent that they should be changed is based on the
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