TL960 SERVICE MANUAL
Caterpillar 3126B HEUI Engines
The Caterpillar 3126B HEUI Engine introduces a new era of the diesel engine in the bus industry using the medium duty diesel engine. The basic engine takes advantage of the 3116's best features and years of experience and combines this with an electronically controlled fuel system, larger displacement, and other new features to produce the 3126B.
The fuel delivery system is controlled entirely by the Electronic Control Module, hereafter called the ECM. The actual delivery of the fuel into the combustion chambers is accomplished by the Hydraulic Electronic Unit Injector system (HEUI), which will be discussed later.
The ECM will identify short/open sensors or operating conditions out of the normal range. It will alert the driver/mechanic through the use of failure codes that are displayed on the dash.
At this point be advised that all subjects related to the operation and maintenance of the engine are covered in the 3100 HEUI manual provided with the chassis manual. Therefore no attempt is made herein to cover engine repairs. Service and operating instructions found in the Caterpillar manuals should be followed. When in need of information concerning the engine, contact your local Caterpillar dealer or distributor who is fully qualified and capable of handling all engine warranty and service repairs.
Those responsible for operating and maintaining the buses