LITE-CHECK INSPECTOR 920
Page: 19 of 36
Air Brake Testing
Once the INSPECTOR 920 is connected to air and power, and to the testing the air and
breaking system can begin. The Emergency Air and Service Air Gauges are similar to
the ones shown below:
1.
EMER.
Press the “
EMER
” button to apply air to the table and release the parking
brakes (source air at 110 to 120 psi)
2.
Press the “
SERVICE
” button to set service brakes (regulated at 90 to
95psi)
3. Identify and record the current air pressure with the gauges.
4.
Press the “
AIR LEAK TEST
” button to perform the air test. Observe the
air gauges for changes.
5. A one minute timer will start on the digital display.
6. Watch for any movement on either gauge.
a. If one gauge falls, there is an external air leak.
b. If the gauges equalize, there is an internal air leak.
7. The Emergency Gauge is allowed 3 pounds of air loss in one minute.
8. The Service Gauge is allowed 2 pounds of air loss in one minute.
a.
HINT
: If the gauge needles move more than one increment in one minute,
the trailer will fail DOT inspection.
b.
HINT
: ABS operation takes about 45 seconds to reach the main menu.
The air leak test can be performed while the ABS test is initiating. Once at
