Pretrip Inspection and Daily Maintenance 37. Check the tire inflation pressures and inspect each tire for bulges, cracks, cuts, and penetrations. After the water and oil condense, they collect near the tank drain valves. Drain the resulting emulsion as follows: 38. Check for indications of loose wheel nuts or rim nuts and examine each rim and wheel component. 39. Check the air brake system for proper operation. WARNING 40. Test the service brakes before leaving the lot. Failure to drain the air reservoirs as instructed could cause sludge formation in the air brake sys- tem.
Sludge could adversely affect braking, causing loss of control, which could cause death, personal injury, or property damage. 41. Test the parking brakes on a 20 percent grade. Pretrip Inspection and Daily Maintenance Procedures NOTE: If the air reservoirs are not equipped with automatic drain valves, they must be drained daily. If they are equipped with auto- matic drain valves, they must be drained in this same manner at least once a week.
Whenever equipment requires adjustment, replacement, repair, addition of lubricants, or a change of lubricants, refer to the Cargo Workshop Manual for repair proce- dures and specifications, and to the Cargo Maintenance Manual for lubricant recommendations, specifications, and maintenance intervals and procedures. 1.1 Open the wet tank valve (the drain cock or pull-chain drain located on the forward end of the supply air reservoir, which is con- nected directly to the air compressor). Block the valve open. 1. Drain the air brake system air reservoirs. Air reservoirs serve as storage tanks for com- pressed air.
They collect water condensed from the air and small amounts of oil from the air compres- sor. Water and oil normally enter the reservoir in the form of vapor because of the heat generated during compression. WARNING When draining the air reservoir, do not look into the air jets or direct them toward anyone. Dirt or sludge 9.3