TM 5-3805-263-14&P-3
AIR SYSTEM AND BRAKES
Air Pressure Gauge(s)
Tools Needed:
Two8M2885 Pressure Gauges, 0 to 200 psi
Two 7S8881 Quick Connective Couplings'.
Two 3B7722 Reducing Bushings.
Two 7S8887 Quick Connective Nipples*.
Two Hose Assemblies'.
*Part of 7S8875 Hydraulic Test Box.
NOTE: Connect the test gauges to the drain valve in both
sections of the tank.
1.
Release the pressure air from the tank by the
opening drain valve.
2.
Remove the drain valve and install a reducing
TEST GAUGE
bushing and a quick connective nipple in the
6. If the pressure on the gauge on the machine is
opening for the drain valve.
more than 15 psi (105 kPa) different than the
3.
Install the quick connective coupling on the
pressure on the test gauge, install a new gauge.
pressure gauge and connect the hose assembly to
7. If it is necessary to install a new gauge, stop the
the air tank and the pressure gauge.
engine and push the brake pedal rapidly until the
4.
Start the engine and let the pressure go up to cutout
pressure air in the tank is released.
pressure.
8. Do not disconnect the test gauge. It will be used in
5.
Make a comparison of the pressure gauge on the
other tests.
machine with a test pressure gauge of known
Air Compressor Governor
accuracy.
1. Start the engine and let the air pressure go up to
the cutout pressure.
2. Read the cutout pressure on the test gauge.
DRAIN VALVE
NOTE: The gauges on the left and right side of the
AIR COMPRESSOR AND GOVERNOR
gauge panel are for the left and the right sections of the
1. Adjustment screw.
air tank respectively.
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