EPA07 MBE 4000 SERVICE MANUAL There is a force-feed lubricating oil circuit supplied by a gear-type oil pump. This pump is positioned at the rear of the oil pan and driven by gears from the crankshaft. The oil heat exchanger is located near the front of the crankcase on the right-hand side near the turbocharger. The gear-type fuel pump is located near the front of the crankcase on the left hand side. The pump is driven from the forward end of the camshaft. The air compressor, with a power-steering pump attached, is driven by a gear on the camshaft. The engine is cooled by a closed system using recirculated coolant; temperature is regulated automatically by a thermostat.
There are two drive belts, each with its own automatic belt tensioner. The fan is driven by one belt. The alternator, coolant pump (and any other accessories) are driven by a main drive belt. AFTERTREATMENT SYSTEM In order to meet current emissions regulations, the traditional muffler has been replaced by a new aftertreatment device. This device consists of a diesel oxidation catalyst and a diesel particulate filter and together these two components burn off collected particulate matter in a process called “Regeneration.” The key to successful regeneration is high exhaust temperature for an extended period of time.
Without adequate temperatures for regeneration, the filter will continue to trap particulates and eventually plug. In order to avoid plugging, Detroit Diesel has designed an actively regenerated aftertreatment system. For additional information refer to the Aftertreatment System Technician's Guide 7SE63. ELECTRONIC ENGINE CONTROL SYSTEM The engine is equipped with a fully electronic control system, Detroit Diesel Electronic Controls (DDEC®) VI. Besides the engine and its related sensors, this system is composed of the Motor Control Module (MCM), and the Common Powertrain Controller (CPC).
The two units are connected by a proprietary datalink through which all necessary data and information can be exchanged. The MCM monitors both the engine and the datalink. When a malfunction or other problem is detected, the system selects an appropriate response; for example, the emergency running mode may be activated. All information subject to change without notice. 4 DDC-SVC-MAN-0026 Copyright © 2011 DETROIT DIESEL CORPORATION