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Navistar WorkStar 7500 - User Manual

Navistar WorkStar 7500
258 pages
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Printed in the United States of America
© 2010 Navistar, Inc. All Rights Reserved
NOTICE CALIFORNIA
Be advised that this motor vehicle may be equipped with
computer / recording devices. Their function is to allow an
authorized individual to download data or information
relating to the operation or performance of this vehicle.
The stored data or information may be neither downloaded
nor retrieved except by the vehicle’s registered owner, or, in
the alternative, by another individual or entity authorized by
the registered owner, such as an International Dealer, who
may need this data or information to properly service or
diagnose this vehicle for repair or following an accident.
Any access to this information without the owner’s consent
may be in violation of law and may subject that person or
entity to criminal penalties.
Proposition 65 Warning
Diesel engine exhaust and some of its
constituents are known to the State of California
to cause cancer, birth defects, and other
reproductive harm.
Battery posts, terminals and related accessories
contain lead and lead compounds, chemicals
known to the State of California to cause cancer
and reproductive harm.
Wash hands after handling.
Important
The information, specifications, and illustrations contained in this manual are based on data that
was current at the time of publication. International reserves the right to make changes and/or
improvements at any time without notification or liability, or without applying those changes or
improvements to vehicles previously manufactured.
Make sure your use of this completed vehicle conforms to all federal, state
and local requirements and regulations imposed on owners and operators.
WORKSTAR
®
Series 3879634R1
7300 • 7400 • 7500 • 7600 Models August 2010

Table of Contents

Questions and Answers

  • A
    Alicia PenningtonAug 9, 2025
    What to do if my Navistar Trucks air filter restriction gauge is locked at the red zone during heavy snow or rain?
    • S
      smolinaAug 10, 2025
      If your Navistar Truck's gauge is locked in the red zone due to heavy snow or rain, inspect the filter elements for any damage.
  • K
    Katherine WheelerAug 17, 2025
    What to do if my Navistar Trucks has a high restriction reading and has an inner element?
    • M
      Mary KramerAug 17, 2025
      If your Navistar Truck shows a high restriction reading, and it's equipped with an inner element, it might be plugged. Replace the inner air filter element if you find it's plugged.
  • C
    Christopher DavisAug 25, 2025
    How to increase airflow to get a restriction reading on my Navistar Trucks?
    • J
      Judith BeckAug 25, 2025
      If your Navistar Truck's gauge isn't showing a restriction reading, and after resetting, the engine airflow might be too low. To resolve this, rev the engine from idle to full RPM multiple times to increase airflow and generate an initial reading.
  • C
    crystalalvaradoSep 1, 2025
    How to check for a leak in the gauge of my Navistar Trucks?
    • E
      Elizabeth GregorySep 1, 2025
      If your Navistar Truck isn't showing a restriction reading, there might be a leak in the gauge. Repeat the vacuum test, but this time, ensure the gauge connection is airtight.

Navistar WorkStar 7500 Specifications

General IconGeneral
BrandNavistar
ModelWorkStar 7500
CategoryTrucks
LanguageEnglish

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