Notice: The oxidation catalytic converter requires the use of unleaded fuel
only. Using leaded fuel will damage the oxidation catalytic converter
and other emission system components.
The following features determine which exhaust system design
is used in a particular vehicle:
| • | The intended use of the vehicle |
All vehicles equipped with gasoline engines have stainless steel exhaust
systems.
The following couplings are used in the exhaust systems for vehicles
equipped with gasoline engines:
| • | A ball joint coupling that secures the exhaust pipe to the exhaust
manifold |
| | The ball joint permits angular movement. Angular movement assists in
alignment. |
| • | Slip joints secure the rest of the exhaust components. |
| | The slip joint coupling design incorporates a clamp and a U-bolt. |
All vehicles that are equipped with the Caterpillar® 3126
diesel engine have the following exhaust components:
| • | A two-piece design exhaust pipe |
| | The tailpipe is made of aluminized steel. |
| | Two tailpipes are available: |
| - | The standard tailpipe is horizontally mounted on the left side. |
| - | A vertical mount tailpipe with a heat guard is available. The
vertical mount tailpipe is flexibly mounted to the cab at two positions. |
The Caterpillar® 3126 diesel engines use wide band clamps
on all of the pipe joints.
The exhaust system is suspended by hangers attached to the frame members.
The use of hangers permits some movement of the exhaust system and prevents
the transfer of noise and vibration into the vehicle.
The heat shields protect both the vehicle and the environment from the
high temperatures developed from the exhaust system (especially from the oxidation
catalytic converter).
The oxidation catalytic converter is an emission control device added
to the gasoline engine exhaust system. The converter reduces hydrocarbon and
carbon monoxide pollutants from the exhaust gas stream. The converter contains
beads that are coated with a catalytic material. The material contains the
following elements in order to reduce the level of nitrogen oxides:
The catalyst in the converter is not serviceable.
