Warm the thermostat and heater assembly to approximately 90° F and again check the resistance. The resistance should exceed 1000 ohms. If the resistance values obtained are within the stated limits, the thermostat and heater assembly is operating properly. If the resistance values obtained are outside the stated limits, replace the heater and thermostat assembly.

6.Pressure Protection Valves. Observe the pressure gauges of the vehicle as system pressure builds from zero. The primary or secondary gauge should rise until it reaches approximately 106 psi (±6 psi), then level off (or a momentary slight fall) as the next pressure protection valve opens—supplying its reservoir. When that pressure gauge passes through approximately 106 psi (±6 psi) there should be an associated leveling off (or momentary slight fall) of pressure as the third and fourth pressure protection valves open. Then the primary and secondary gauges should increase together until they reach their full pressure of approximately 130 psi (±5 psi).

If the Bendix® AD-IS®air dryer and reservoir system does not perform within the pressure ranges as described above, recheck using gauges known to be accurate. If the readings remain outside of the ranges outlined, replace the AD-IS air dryer and reservoir system. NOTE: There are no kits available for the servicing of the pressure protection valves. Warning: Do not attempt to adjust or service the pressure protection valves—incorrect pressure protection valve settings can result in automatic application of the vehicle spring brakes without prior warning (in the event one of the supply circuits experiences rapid pressure loss).

GENERAL

When rebuilding or replacing components of the air dryer and reservoir, use only genuine Bendix® brand replacement parts. For ease in servicing, the AD-IS air dryer and reservoir have been designed so that maintenance kits can be installed without removing the air dryer and reservoir from the vehicle. CAUTION: Always depressurize the air dryer and purge reservoir—and all other reservoirs on the vehicle—to 0 psi before servicing the air dryer.

If—after completing the routine operation and leakage tests—it has been determined that one or more components of the air dryer requires replacement or maintenance, refer to the Maintenance Kit listing shown in this manual or the Bendix® Quick Reference Catalog for the appropriate kit(s). The Quick Reference catalog (BW1114) can be ordered and viewed on line at www.bendix.com.

Note: Kits are not available for the servicing of the pressure protection valves (See Figure 5). Do not attempt to adjust or service the pressure protection valves - these are not service items.

TESTING THE BENDIX® AD-IS®AIR DRYER AND RESERVOIR SYSTEM

Before placing the vehicle into service, perform the following tests:

1.Close all reservoir drain valves.

2.Build up system pressure to governor cut-out and note that the Bendix AD-IS air dryer purges (with an audible burst of air), followed immediately by approximately 30 seconds of air flowing out of the purge valve.

3.Apply and release the service brakes to reduce system air pressure to governor cut-in. Note that the system once again builds to full pressure and is followed by a purge at the air dryer exhaust.

4.It is recommended that the total air system be tested for leakage to assure that the AD-IS air dryer and reservoir system will not cycle excessively.

THE BENDIX® AD-IS®

PRESSURE

AIR DRYER GOVERNORS ARE

PROTECTION

NON-ADJUSTABLE

VALVE

AND FEATURES A BREATHER

LOCATIONS

VALVE IN THIS PORT

 

FIGURE 5 - PRESSURE PROTECTION VALVE LOCATIONS

WARNING

DO NOT ATTEMPT TO ADJUST OR

SERVICE THE PRESSURE PROTECTION

VALVES. INCORRECT PRESSURE PROTECTION VALVE SETTINGS CAN RESULT IN AUTOMATIC APPLICATION OF VEHICLE SPRING BRAKES WITHOUT PRIOR WARNING.

8

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BENDIX SD-08-2418 manual General
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SD-08-2418 specifications

The BENDIX SD-08-2418 is a sophisticated air brake system designed for heavy-duty trucks and commercial vehicles. This unit is widely recognized for its reliability and performance in demanding driving conditions. Engineered to enhance safety and control, the SD-08-2418 is particularly popular among fleet operators and vehicle manufacturers.

One of the main features of the BENDIX SD-08-2418 is its advanced modulation technology, which allows for optimal brake application and release. This technology ensures a smooth and controlled braking experience, reducing the risk of wheel lock-up and ensuring that drivers maintain steering control during hard stops. This is crucial for maintaining safety when operating large vehicles under heavy loads.

The SD-08-2418 also incorporates a lightweight design, which contributes to improved fuel efficiency and overall vehicle performance. The unit is constructed from high-quality materials that not only reduce weight but also enhance durability and longevity. This is vital for trucks that endure rigorous use across varied terrains and conditions.

Another notable characteristic of the BENDIX SD-08-2418 is its compatibility with advanced electronic braking systems (EBS). This compatibility allows for efficient integration with modern vehicle technologies such as anti-lock braking systems (ABS) and traction control systems. By enabling the seamless exchange of information between the braking system and vehicle control units, the SD-08-2418 enhances the overall safety and performance of the truck.

Moreover, the BENDIX SD-08-2418 features a user-friendly installation process, which is essential for minimizing downtime during maintenance. Its straightforward design allows technicians to replace or service the unit with ease. This reduces operational costs and promotes efficient fleet management.

In conclusion, the BENDIX SD-08-2418 is a state-of-the-art air brake system that combines advanced features, reliable performance, and ease of installation. Its innovative technology and lightweight design make it a top choice for commercial vehicle operators who prioritize safety, efficiency, and durability in their braking systems. As the demands on modern vehicles evolve, the BENDIX SD-08-2418 remains a key player in the field of heavy-duty braking solutions.
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