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84 Instruments and Controls
N — Fuel Level Gauge
The gauge is connected to a sending unit in
the fuel tank. There is only one sender even
if the vehicle is equipped with dual tanks.
W3003628
O — Application Air Brake Pressure (option)
Air gauges are directly connected to the air
brake system. They will indicate the brake
application pressure from either the front,
rear or trailer circuit pressure.
The gauge will not register air pressure un-
til the foot brake pedal is depressed or the
trailer hand brake is applied.
W3004302
O — Air Suspension Pressure (option)
Air gauges are directly connected to the air
suspension system. It will indicate the sus-
pension pressure in the air springs.
The pressure shown on the gauge is a crude
indication of the load on the rear axle(s).
The gauge should not be used for trying to
balance the load between the axles.
W3003633