TROUBLESHOOTING TABLE (Continued)
TEST OR INSPECTION
11. LOW AIR WARNING LIGHT IS ON (Continued)
Step 4. Check for open petcock on service air tank.
a. If petcock is open, close it.
b. If petcock is closed, go to step 5.
Step 5. With engine stopped and brake treadle released, record drop in AIR
PRESS gage reading during one-minute period.
a. If AIR PRESS gage reading drops more than 2 PSI per minute, notify organizational
b. If AIR PRESS gage reading drops less than 2 PSI per minute, air system leakage is
12. BATTERIES REQUIRE DAILY FILLING
Step 1. With engine running at 1200 rpm, check voltmeter reading.