BENDIX SD-08-2418 manual Preventive Maintenance

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The actual regeneration of the desiccant drying bed begins as dry air from the purge reservoir flows through the purge orifice into the desiccant bed. Pressurized air from the purge reservoir expands after passing through the purge orifice; its pressure lowers and its volume increases. The flow of dry air through the drying bed regenerates the desiccant material by removing any water vapor adhering to it. Approximately 30 seconds are required for the entire contents of the purge reservoir of a Bendix® AD-IS®air dryer and reservoir system to flow through the desiccant drying bed.

The delivery check valve assembly prevents air pressure in the brake system from returning to the air dryer during the purge cycle. After the purge cycle is complete, the air dryer and reservoir system is ready for the next charge cycle to begin.

TURBO CUT-OFF FEATURE (Refer to Figure 3.)

The primary function of the turbo cut-off valve is to prevent loss of engine turbocharger air pressure through the AD-IS air dryer when the dryer is in the purge mode.

At the onset of the purge cycle, the downward travel of the purge piston is stopped when the turbo cut-off valve (the tapered portion of purge piston) contacts its mating metal seat in the purge valve housing. With the turbo cut-off valve seated (in the closed position), air in the compressor discharge line—as well as the AD-IS air dryer inlet port— cannot enter the air dryer. By completing these actions, the turbo cut-off effectively maintains turbo charger boost pressure to the engine.

PREVENTIVE MAINTENANCE

Important: Review the warranty policy before performing any intrusive maintenance procedures. An extended warranty may be voided if intrusive maintenance is performed during this period. Purge valve maintenance is permissible during the warranty period only when using a genuine Bendix® purge valve kit.

Because no two vehicles operate under identical conditions, maintenance and maintenance intervals will vary. Experience is a valuable guide in determining the best maintenance interval for any one particular operation.

Every 900 operating hours, or 25,000 miles, or three

(3) months:

1.Check for moisture in the air brake system by opening reservoir drain valves and checking for the presence of water. If moisture is present, the desiccant cartridge may require replacement; however, the following conditions can also cause water accumulation and should be considered before replacing the desiccant:

A.An outside air source has been used to charge the system. This air did not pass through the drying bed.

B.Air usage is exceptionally high and not normal for a highway vehicle.

This may be due to accessory air demands or some unusual air requirement that does not allow the compressor to load and unload (compressing and non-compressing cycle) in a normal fashion. Check for high air system leakage. If the vehicle vocation has changed, it may be necessary to upgrade the compressor size. Refer to Bendix Specification

BW-100-A / Appendix D, to determine if any changes are necessary. Specification BW-100-A is available from the Bendix TechTeam at 1-800-247-2725 or www.bendix.com.

C.The location of the air dryer and reservoir system is too close to the air compressor. Refer to Bendix

Specification BW-110-A / Appendix B, for discharge line lengths.

D.In areas where more than a 30 degree range of temperature occurs in one day, small amounts of water can temporarily accumulate in the air brake system due to condensation. Under these conditions, the presence of small amounts of moisture is normal.

For Bendix® AD-IS®air dryers: Preventive Maintenance is as easy as 1-2-3

Adhering to a preventive maintenance schedule is crucial to keeping a vehicle’s air system clean and ensuring superior performance of all components that utilize system air— such as brakes, emissions equipment and automated manual transmissions. Depending on vocation, Bendix recommends a 1, 2 or 3-year air dryer cartridge replacement on vehicles equipped with a Bendix® compressor.

For severe service application—such as residential refuse trucks or school buses—the air dryer cartridge should be replaced every year or 100,000 miles; for pick-up and delivery operations, or for double- and triple-trailer line haul trucks, every two years or 200,000 miles is the recommendation. Line-haul operations using a single trailer should swap the filter out every three (3) years or 300,000 miles. The recommended intervals for trucks equipped with non-Bendix compressors are 6 months (50,000 miles), one year (100,000 miles) and two years (200,000 miles), respectively.

More frequent intervals may be required depending on a vehicle’s age, its compressor condition, use of a non-Bendix compressor, the operating environment, the vehicle’s vocation, and its usage. In conjunction with these guidelines, fleets can determine the functionality of their filters by checking for moisture in the air brake system monthly. If moisture is present, the air dryer cartridge may require replacement. Reference the Bendix Service Data Sheet of the specific air dryer for additional information.

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Contents SD-08-2418 General Safety Guidelines Description Charge Cycle Refer to Figure Purge Cycle Refer to Figure Preventive Maintenance Heater and Thermostat Connector General Braking System Protection Delivery Check Valve Cleaning Procedure Log-on and Learn from the Best Page Symptom Cause Remedy Replace the safety valve Refer to paragraph 5 of the Operation and Leakage Tests for Symptom Cause Remedy

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.