WORKHORSE CUSTOM CHASSIS
Service Manual
W SeriesWCC
SECTION
6.2
PAGE
89
Engine Mechanical
W Series Chassis
TOC
© 2006 WorkhorseCustom Chassis — All Rights Reserved
ENGINE IDENTIFICATION
The vehicle identifi cation number (VIN) is located on the left side rear of the engine block (1) and is typically a 9 digit
number stamped or laser-etched onto the engine at the vehicle assembly plant.
• The fi rst digit identifi es the division.
• The second digit identifi es the model year.
• The third digit identifi es the assembly plant.
• The fourth through ninth digits are the last 6 digits of the VIN.
DIAGNOSTIC STARTING POINT - ENGINE MECHANICAL
(LR4 VIN V & LQ4 VIN U)
Begin the system diagnosis by reviewing the Disassembled Views, Engine Component Description , Lubrication
Description , New Product Information , and the Drive Belt System Description. Reviewing the description and
operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists.
Reviewing the description and operation information will also help you determine if the condition described by the
customer is normal operation. Refer to Symptoms - Engine Mechanical in order to identify the correct procedure for
diagnosing the system and where the procedure is located.
Strategy Based Diagnostics
Perform a Diagnostic System Check - Vehicle before using the symptom tables, if applicable.
Review the system operations in order to familiarize yourself with the system functions. Refer to Disassembled
Views , Engine Component Description , Drive Belt System Description , Lubrication Description and New Product
Information .
All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for
repairing all systems. The diagnostic fl ow may always be used in order to resolve a system condition. The diagnostic
fl ow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis .
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General