Air-Consuming Devices Turned Off
wv mm 32.01.002
Follow the procedure below to determine if a pressure drop in the rear air suspension system is within the allowable range.
Note: With all air-consuming devices turned off (service brakes released
and parking brake applied [exhausted]), pressure drop must not exceed
2 psi (14 kPa) in one minute.
- Park the vehicle on a level surface, place the transmission in Neutral (N), and apply the parking brake.
- Turn off all air-consuming devices.
- Run the engine until the air system reaches full pressure.
- Shut down the engine and wait one minute for the air pressure to stabilize. Note the reading on the air pressure gauge.
- Wait one additional minute and check the gauge reading again to see if there has been any pressure drop.
- Pressure drop from air leakage must be less than 2 psi (14 kPa).
Note: The minimum compressor cut-out pressure is 110 psi (758 kPa).
Note: