Navistar WorkStar Series, Operator'S Manual

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Maintenance Instructions
Clutch
Pedal Free-Travel
Each time the vehicle chassis is lubricated, check clutch pedal
free-travel. If clutch pedal free-travel is outside the 1 to 1 1/2
inch (25 to 38 mm) range, the clutch must be adjusted to ensure
that the clutch is fully engaging and the clutch brake will activate.
NOTE: Proper clutch pedal free-travel adjustment will provide
adequate release yoke fingers-to-release bearing clearance, as
well as release bearing-to-clutch brake clearance.
New International® vehicles use nonasbestos clutch linings.
However, exposure to excessive amounts of clutch material
dust (whether asbestos or nonasbestos, fiberglass, mineral
wool, aramid, ceramic, or carbon) may be a potentially serious
health hazard.
WARNING
To prevent personal injury or death, prevent
breathing clutch lining fiber dust. Always wear a
respirator when doing clutch lining maintenance.
Persons who handle clutch linings should follow the same
precautions as outlined for handling brake linings.
Electrical
Batteries
Battery life and performance varies greatly depending on
duty cycle.
Conditions such as short runs between starts,
low ambient operating temperatures, using battery current
without the engine running, and vibration will reduce battery
life. Battery life is also affected by the condition of interrelated
components, such as alternators, battery cables, connections,
engine startability, starter, etc. To maximize battery life, it is
important to keep electrical components, battery boxes, and the
engine in top condition and to minimize or eliminate electrical
loads when the engine is not running.
Battery life can be extended by keeping the batteries fully
charged at all times.
Periodically charging the batteries
with a battery charger may be able to charge the batteries
more completely than the vehicle’s alternator in certain
severe applications.
Use a battery charger (float charger)
that automatically reduces amperage or shuts off when the
batteries are fully charged. Use of a Midtronics 55-Amp Power
Supply/Smart (Battery) Charger, Model Number PCX550, Part
Number PSC550CCKIT (or equivalent), available through your
International dealer, is recommended.
Cold batteries resist charging. Battery performance can be
improved by regularly or even periodically storing vehicles and
charging batteries with an automatic float charger for 8 to 24
hours in a warm garage during the cold winter months.
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