PREVOST X3-45 Multiplex, Maintenance Manual

Page: 47 / 1422

SECTION 01: ENGINE
PA1562
17
DRY TORQUES
REFERENCE DESCRIPTION Lbf-Ft Nm
A SCREW, CAP HEXAGONAL HEAD M8 – 1.25 G8.8 16 22
B SCREW, CAP HEXAGONAL HEAD M8 – 1.25 G10.9 22 30
C SCREW, CAP HEXAGONAL HEAD M10 – 1.5 G10.9 43 58
D SCREW, CAP HEXAGONAL HEAD M12 – 1.75 G8.8 60 81
E SCREW, CAP HEXAGONAL HEAD M14 – 2.0 G8.8 90 122
F SCREW, CAP HEXAGONAL HEAD M16 – 2.0 G8.8 140 190
G SCREW, CAP HEXAGONAL HEAD M16 – 2.0 G10.9 190 258
H SCREW, CAP HEXAGONAL HEAD M20 – 2.5 G10.9 450 610
2. DDC SERIES 60 ENGINE
Detroit Diesel series 60 engine is a 6-cylinder,
four-cycle engine, equipped with an electronic
control system (DDEC VI).
One engine displacement is used in the X3
Coaches Series 60 engines: 14.0 liters.
Summary information on the Electronic Control
System is given in this section.
Complete maintenance and repair information
on the engine will be found in the current
DETROIT
DIESEL SERIES 60 2007 ON-
HIGHWAY SERVICE MANUAL 6SE2007. This
essential manual contains complete instructions
on operation, adjustment (tune-up), preventive
maintenance and lubrication, parts verification,
repair or replacement. This manual’s sections
cover complete systems such as:
•
Engine main assembly;
•
Fuel system;
•
Lubrication system;
•
Cooling system;
•
Fuel, lubricating oil and coolant;
•
Air intake system;
•
Exhaust system;
•
Exhaust gas recirculation components;
•
Electrical equipment;
•
Operation and verification;
•
Engine tune-up;
•
Preventive maintenance;
•
Storage;
Refer to Series 60 DDEC VI Troubleshooting
Guide published by Detroit Diesel for more
complete information on diagnosis of
components and system problems.
Procedures for engine removal and installation
are given at the end of this section. The DDEC
system is self-diagnostic. It can identify faulty
components and other engine-related problems
by providing the technician with diagnostic
codes.
2.1 DDEC VI SYSTEM
DDEC VI (
D etroit D iesel E lectronic C ontrol) is a
system that monitors and determines all values
required for the operation of the engine. A
diagnostic interface is provided to connect to an
external diagnosis tester. Besides the engine
related sensors and the engine-resident control
unit, the Motor Control Module (MCM), this
system has a chassis-mounted control unit for
vehicle engine management, the Common
Powertrain Controller (CPC). The connection to
the vehicle is made via a CAN interface which
digitally transmits the nominal values (e.g.
torque, engine speed specification, etc.) and the
actual values (e.g. engine speed, oil pressure,
etc.).
DDEC VI controls the timing and amount of fuel
injected by the electronic unit injectors (EUI).
The system also monitors several engine
functions using electrical sensors, which send
electrical signals to the Motor Control Module
(MCM). The MCM computes the electrical
signals and determines the correct fuel output
and timing for optimum power, fuel economy
and emissions. The MCM also has the ability to
display warnings or shut down the engine