TM 5-3800-205-23-1
TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0005 00
AIR COMPRESSOR GOVERNOR ADJUSTMENT - CONTINUED
(2)
Loosen locknut on adjustment screw.
LOCKNUT
ADJUSTMENT SCREW
390-1611
(3)
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.
(4)
Turn adjustment screw clockwise to lower cut-out pressure. One turn of adjustment screw changes pres-
sure approximately 20 psi (140 kPa).
g.
If adjustment screw does not change cut-out pressure, air compressor unloading valves are not working correctly.
h.
If no difference between cut-in and cut-out pressure is observed, replace air compressor governor (WP 0083
AIR LEAKAGE CHECKS
1.
2.
Air Leakage Checks.
WARNING
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.
NOTE
You can hear air leakage. Air leakage can be seen when soapy water is applied to connections, valves and
hoses.
a.
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.
b.
Check for leakage at hoses, lines, and connections between air compressor and tractor air tanks.
c.
Check for leakage at hoses, lines, and connections between tractor air tanks and service brake control valve.
0005 00-14
