This comprehensive service repair manual for MACK Trucks V-MAC II, VMAC2, and VMACII systems covers the 1998 model year. It provides detailed information on the operation, description, and troubleshooting of the V-MAC II system. The manual begins with a general overview of the system and its components, including the V-MAC II module, fuel injection pump, fuel rack actuator, ECONOVANCE timing advance mechanism, and various system sensors. It delves deeper into each sensor, explaining its function and operation within the system. The manual also details the cab and dashboard switches, system lamps, and connectors, including the V-MAC II module connectors, fuel injection pump connector, serial communication port, bulkhead connectors, and sensor connectors.

A major functions chart outlines the key functions of the system, including fuel control, timing control, speed control/cruise control, road speed limiting, engine protection shutdown, idle shutdown, accessory relay control, and on/off fan control. It then explores diagnostic tools and procedures, covering diagnostic software functions, SAE/ATA serial line, diagnostic tools like digital multimeter, Pro-Link 9000, IBM-compatible PC, J 1708 serial data link adaptor, and J 38500-63 serial link jumper. The manual includes a comprehensive section on diagnostic blink codes, explaining how to determine and identify them. It provides detailed troubleshooting procedures for identifying faults, locating blink code information, and performing diagnostic tests.

The manual also includes valuable service hints and test procedures for wires, connectors, and system components. Specific sections are dedicated to troubleshooting specific diagnostic blink codes, covering a wide range of potential issues. The manual also presents symptom-related diagnostics for common problems such as buffered MPH (speedometer signal), low coolant level, intermittent problems, low oil pressure with driver alarm, incorrect oil pressure versus gauge, injection pump RPM (engine speed) sensor, engine brake verbal complaint, buffered RPM (tach drive output), and on/off fan control verbal complaint.

A dedicated section on switch circuit diagnostics provides an introduction to the topic and explains how to troubleshoot switch circuit failures. A symptom-related troubleshooting chart helps to quickly pinpoint potential issues. The manual concludes with repair and adjustment procedures, including connector repair, terminal replacement, clutch switch adjustment, and sensor adjustment. It provides specifications for the V-MAC I and II E7 engine parameters for 1995 and later models. The manual includes a list of special tools and a detailed tool list for the V-MAC II system. Finally, it defines SAE message descriptions and communication standards for the system.

The MACK Trucks V-MAC II, also known as VMAC2 or VMACII, is a powerful and versatile mobile air compressor system designed specifically for heavy-duty trucks. This unit is a critical component in various applications, including construction, mining, and utility operations, where compressed air is vital for powering tools and equipment. The V-MAC II is renowned for its robust construction, high output, and exceptional reliability, making it a trusted solution for professionals demanding consistent and reliable air supply in demanding environments. The system features a powerful air compressor, driven by the truck's engine, capable of supplying large volumes of compressed air at high pressures. This efficient design ensures that the V-MAC II can meet the demands of even the most demanding applications, delivering consistent and reliable performance regardless of the task at hand.

The V-MAC II is equipped with a range of advanced features that enhance its usability and efficiency, including a user-friendly control panel for easy operation, a durable and corrosion-resistant construction for extended lifespan, and a comprehensive safety system to ensure operator protection. The system is also designed for ease of maintenance, with readily accessible components and readily available replacement parts, minimizing downtime and maximizing uptime. The V-MAC II can be customized based on specific application requirements, offering a variety of configurations to meet diverse needs. From different air output capacities to various mounting options and accessories, the V-MAC II is a flexible and adaptable solution that can be tailored to meet the unique requirements of each individual user. With its combination of power, reliability, and versatility, the MACK Trucks V-MAC II is a leading choice in the mobile air compressor market, proving itself as a dependable and efficient partner for professionals across various industries.