How can you determine if your air brake system includes an integrated air dryer system?
- The air brake system comes with an user manual detailing the presence of an air dryer
- An air dryer integrated system check light is on the dashboard
- The air dryer incorporates a small air reservoir (tank) ✓
- The air brake system is labeled accordingly
Answer: C. The air dryer incorporates a small air reservoir (tank)
You can tell if the system has an integrated air dryer because the dryer includes a small air reservoir, called a purge reservoir.
Why this is the answer
The handbook describes the integrated air dryer system as combining the spin-on filter, dryer, and governor into one unit. It also says this system includes a purge reservoir that supplies the air needed to purge moisture and contaminants from the dryer cartridge when the compressor unloads. That small reservoir is the identifying feature named in the passage, and the former wet or supply reservoir is not needed with this system.
Why the other answers are wrong
- A. The air brake system comes with an user manual detailing the presence of an air dryer — A user manual describing an air dryer is not the identifying feature the handbook gives for an integrated system.
- B. An air dryer integrated system check light is on the dashboard — The passages do not mention an integrated air dryer check light on the dashboard.
- D. The air brake system is labeled accordingly — The passages do not say the air brake system is labeled to show that an air dryer is integrated.
Remember it
One combined unit plus a small purge reservoir is the clue for an integrated air dryer system.