Maintenance Manual Ottawa T2 4x2
4.3.1
Air Compressor and Governor
page
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Description
Air Compressor Governor
Pressure is supplied by a reciprocating piston-type compressor
mounted on the engine. The compressor shares engine lubri-
cation and coolant systems.
Running continuously, the compressor requires a governor to
maintain the necessary system pressure. The governor is
mounted on the compressor. Operating in conjunction with an
unloading valve, the governor directs air into the reservoirs or
out the exhaust port.
4.3.4 Air
Reservoir
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Description
The air reservoirs maintain a sufficient quantity of air under
pressure to sustain several applications of the brakes. Stan-
dard vehicles with a split brake system (DOT/EPA approved
vehicles) have three air reservoirs.
In the three-reservoir system, one serves as the primary, some-
times called the wet tank. It supplies air to the other two reser-
voirs independently. A pressure relief valve in the primary tank
protects the system from excessive pressure.
One of the two secondary reservoirs supplies air to the front
brakes and the other to the rear brakes. Check valves prevent
air from returning to the compressor when it is not running. This
arrangement allows one set of brakes to operate in the event
the other should fail.
Each tank has its own drain valve to release water and oil that
may have accumulated in the tank during operation.
System pressure is monitored by a low pressure sensor that
communicates with an indicator light mounted in the instrument
panel and a buzzer mounted on an electrical relay panel on the
cross member below the steering column. The indicator and
buzzer are activated while the system pressure is below 70 psi.
4.3.9
Stop Light Switch
page
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Description
This is an air-actuated switch that causes the stop lights to illu-
minate when system air pressure increases to 5 psi after de-
pressing the foot pedal.
Summary of Contents for Ottawa t2
Page 1: ......
Page 47: ...38 0 8 Electrical Instruments 0 Machine Complete Maintenance Manual Ottawa T2 4x2 ...
Page 53: ...44 1 11 Start Stop 1 Engine Maintenance Manual Ottawa T2 4x2 ...
Page 55: ...46 2 Transmission Maintenance Manual Ottawa T2 4x2 ...
Page 57: ...48 3 Driveline Axle Maintenance Manual Ottawa T2 4x2 ...
Page 73: ...64 5 4 Diagnosis Hydrostatic Steering 5 Steering Maintenance Manual Ottawa T2 4x2 ...
Page 81: ...72 7 11 Diagnosis Boom 7 Load Handling Maintenance Manual Ottawa T2 4x2 ...
Page 83: ...74 8 Control System Maintenance Manual Ottawa T2 4x2 ...
Page 145: ...136 11 2 Safety 11 Common Electric Maintenance Manual Ottawa T2 4x2 Chassis Power Board ...
Page 153: ...144 12 5 Air Dryer 12 Common Pneumatics Maintenance Manual Ottawa T2 4x2 ...
Page 155: ...146 D Error Codes Maintenance Manual Ottawa T2 4x2 ...
Page 261: ...252 0 4 Fastener Torque Values F Technical Data Maintenance Manual Ottawa T2 4x2 ...