Today’s Fleet Managers are faced with many challenges – most of important of which if maintaining a healthy bottom line. With fuel costs at an all-time high, these challenges have become increasing difficult. To help combat these problems and others facing Fleet Management today, Mustang Dynamometer now offers the 7500 Series Product Line – which features the most advanced diagnostic Chassis Dynamometer in the industry – the MD-7500-400-F Eddy Current Chassis Dynamometer. The 7500 can create the conditions fleet vehicles encounter everyday in a safe and controlled in-door environment - so that critical engine and drivetrain systems can be checked to insure vehicles are performing properly and at maximum efficiency. What’s more, the 7500-400-F offers several levels of testing capabilities in a modular, compact package and with capabilities that can be upgraded in the future as your needs change. Every vehicles can now be tested before and after repairs to insure proper diagnosis and repair. In addition to testing repaired vehicles, the 7500-400-F can be used to test vehicles on a regular basis as a preventative maintenance measure; which decreases unexpected breakdowns, and allows fleet management to control fuel costs while reducing repair costs. Periodic testing keeps fuel consumption to a minimum and helps technicians identify suspect components before they fail. A proactive approach to Fleet Service can prevent unexpected engine and or drivetrain failure; which saves Fleets thousands of dollars in lost fair revenues.

At the heart of the 7500-400-F is twin Eddy Current, air cooled Power Absorbers. Each Absorber, or brake, can hold up to 750-hp (total power of 1500-hp) – more than enough to simulate a fully loaded Transit Bus. The 7500-400-F is available in two mechanical configurations, both of which are designed for in-ground installation, while one of the two is also available with a heavy duty drive-on rack for aboveground installation. As the system is air-cooled, no water is required to or from the device - eliminating the high cost of water consumption and/or the cost of an expensive water recovery system - which can sometimes exceed the cost of the dynamometer system itself. Mustang is the only company in the world that offers a Universal Fleet Test Bed without water supply requirements. All that is required to run the system is 208-240VAC, three-phase, 40-amp power. Each of the 7500-400-F’s rollers measures 20-inch in diameter, which increases tire-roller contact area and decreasing tire wear and tire temperature. Each roller surface is knurled for maximum traction, whilst a belt-drive connects the primary roller set to the secondary roller set – minimizing “rocking” on the rollers and keeping wheels safely centered between the two sturdy roller sets. The 7500-400-F’s stout frame is fabricated by hand using structural steel for maximum life and durability, whilst the bearings, couplers, and related mechanical subcomponents are machined and over-built to insure years of trouble-free operation. Every 7500 series dynamometer is individually tested and inspected to insure the highest degree of quality and performance.

The 7500-400-F roller bed is controlled and monitoring by a sophisticated DAC based control and Data Acquisition Platform, the MD-7500-DAC-F, with Mustang’s intuitive and powerful MD-7500-SFT-F Software as the user’s primary interface to the 7500 Series’ many testing capabilities. The MD-7500-DAC-F communicates to your Pentium IBM Computer via a Serial Port Interface, whilst a hand-held pendant allows the user to place primary commands to the central computer from the cab of the bus during testing. The MD-7500-DAC-F is housed in a standard NEMA enclosure, suitable for wall or stand mounting. The 7500-DAC-F enclosure includes An E-stop, pendant port, MD-7500-400-F sensor input port for speed and torque, Serial Communications Port, Dual Eddy Current PAU Power Output, and 208-240VAC, three phase, 40-amp power input.

The MD-7500-SFT-F is a Windows Based Software Program with several layers of testing capabilities designed to help the modern fleet technician correctly diagnose and repair today’s modern Fleet Vehicles. In addition to being flexible and powerful, the 7500-SFT-F is surprising easy to use and understand – with pre-designed test templates, easy-to-understand menus and commands, and user-configurable pass/fail set-points, preferences, and settings. The 7500-SFT-F includes the ability to record and display both dynamometer related parameters like power and torque as well as vehicle-related parameters like engine temp and pressure, via the optional MD-7500-ECU-F Module. The MD-7500-ECU-F interfaces to all Engine Control Units that utilize either J1708 or J1939 Protocol. The Standard 7500 series software includes features to test the following major vehicle aspects,

1. Engine Performance - Peak Horsepower and Torque Test
2. Transmission Up-Shift Test
3. Transmission Down-Shift Test
4. Parasitic Drag Check
5. Cruise Control Check
6. Road Load Simulation
7. Speedometer Check
8. Manual Load Control Test
9. Acceleration
10. Constant Speed
11. Constant Load
12. Retarder Test
13. Warm-up Test
14. Thermal Test – cooling fan switch
15. Simulate New York Bus Drive Cycle, and other Heavy Duty Drive-Cycles (non-motoring)
16. Governed Speed Check
17. Pre-Inspection and Post-Inspection

While the standard 7500 Series is loaded with capabilities for the average user, Mustang also offers various optional modules that increase the 7500’s testing potential to include capabilities that increase utility for fleets interested in increased data acquisition, fuel consumption monitoring, vibration check and emissions testing. Options available with the 7500 series include an opacity meter (MD-SMKT-DT-230) for checking diesel exhaust plume density, a barcode reader for data entry, advanced analytical equipment for measuring HC, CO, NOx and Particulate Matter, Accelerometers (MD-7500-VB) for monitoring axle vibration, an optical sensor (MD-SMARTACH-RPM) for measuring engine RPM or cooling fan RPM, a Weather Station (MD-IWS-2000) for correcting data to SAE Standards, secondary roller sets for testing brakes at high speed (MD-13K-BT-HS) or low speed (MD-13K-BT-LS), an enhanced brake tester for testing brake effort and ABS Braking Systems (MD-13K-BT-ABS), and a real-time ECU data stream connection (MD-7500-ECU-F) for monitoring and recording ECU parameters such as oil temperature and pressure, coolant temperature and pressure, RPM, Fuel Consumption, Vacuum, etc. during tests. Optional Testing Capabilities available with the 7500 series include,

• Vibration Check
• Fuel Consumption and Economy
• Engine RPM
• Engine Temperatures and Pressures as available from the Fleet vehicle’s ECU
• Standard Brake Testing
• ABS Brake Testing
• SAE Correction
• Diesel Lug-Down and other Emissions Tests