TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
AIR COMPRESSOR GOVERNOR ADJUSTMENT - CONTINUED
Loosen locknut on adjustment screw.
Turn adjustment screw counterclockwise to raise cut-out pressure. One turn of adjustment screw changes
pressure approximately 20 psi (140 kPa). Cut-in pressure will change by the same amount.
Turn adjustment screw clockwise to lower cut-out pressure. One turn of adjustment screw changes pres-
sure approximately 20 psi (140 kPa).
If adjustment screw does not change cut-out pressure, air compressor unloading valves are not working correctly.
If no difference between cut-in and cut-out pressure is observed, replace air compressor governor (WP 0083
AIR LEAKAGE CHECKS
Air Leakage Checks.
Sudden movement of machine or release of air under pressure can cause injury to personnel on or near
machine. To prevent possible injury, perform procedure before testing and adjusting air system and brakes.
You can hear air leakage. Air leakage can be seen when soapy water is applied to connections, valves and
Start engine (TM 5-3800-205-10-1 or TM 5-3800-205-10-2) and allow air pressure to reach cut-out pressure of
125 psi (860 kPa). Once pressure is reached, stop engine.
Check for leakage at hoses, lines, and connections between air compressor and tractor air tanks.
Check for leakage at hoses, lines, and connections between tractor air tanks and service brake control valve.