4324330530 | Genuine WABCO AD SysS Twin with TCV and Coal, 24V, 0.8mm

• Part type
  Premium original quality
• Product category
  Device
• Calculated Volume (dm³)
  17.1
• Technical specification
  OE specification
• Size (mm x mm x mm)
  286 x 188 x 318

Kenworth, Peterbilt, Freightliner, Volvo Trucks, Mack Trucks, Western Star, other heavy-duty trucks and buses using WABCO air brake systems and a 24V electrical system.

• Remove moisture from compressed air
  • Prevents water from accumulating in air tanks.
  • Reduces corrosion inside valves, tanks, and air lines.
  • Helps prevent air lines and valves from freezing in cold weather.
• Filter out oil and contaminants
  • The coalescing ("Coal") filter captures fine oil aerosols from the air compressor, as well as dirt and other particles.
  • This protects sensitive components such as brake valves, ABS modulators, and air suspension valves.
• Automatically purge collected moisture
  • When the air compressor reaches the cut-out pressure, the air dryer purges the collected water and contaminants through its purge valve.
  • This keeps the drying media effective and prepares it for the next compression cycle.
• Reduce compressor workload
  • The Turbo Cut-Off Valve (TCV) works with the compressor unloading process during the purge cycle, helping improve efficiency and reducing unnecessary compressor operation.
• Protect the entire pneumatic system
  • Clean, dry air extends the service life of components such as:
    • Brake valves
    • ABS valves and modulators
    • Air suspension controls
    • Air-operated accessories
    • Seals and diaphragms

1. Water in the air tanks

• Excessive water drains from the air tanks.
• Rust or sludge is found in the reservoirs.
• This is one of the most common signs that the desiccant cartridges are saturated or the dryer is no longer removing moisture effectively.

2. Oil in the air system

• Oily residue in air tanks or air lines.
• Oil contaminates brake valves, suspension valves, or other pneumatic components.
• This can indicate a failed coalescing filter or excessive oil carryover from the compressor.

3. Air leaks from the purge valve

• A constant hissing sound from the bottom of the air dryer.
• Air continues leaking after the purge cycle should have ended.
• Possible causes include a worn purge valve, damaged seals, or internal valve problems.

4. Air compressor runs more than normal

• Compressor cycles on and off frequently.
• Longer time is needed to build air pressure.
• Air pressure may struggle to reach the governor cut-out setting.

5. Poor air pressure build-up

• Slow pressure rise after startup.
• Low system pressure warnings.
• Air-powered accessories may not function properly.

6. Frozen air lines in cold weather

• Moisture bypasses the dryer and freezes in valves or air lines.
• Brakes or suspension may operate sluggishly or not at all until the ice melts.

7. Purge valve doesn't operate correctly

• No purge blast when the compressor reaches cut-out pressure.
• Purge occurs continuously or at the wrong time.
• A loud purge that never stops can indicate a valve failure.

8. Brake or suspension problems
Although the air dryer isn't the brake control itself, contaminated air can lead to:

• Sticky brake valves
• Slow brake release
• Air suspension faults
• Premature failure of ABS or relay valves