Terex TR60 Maintenance Manual page 28

Engine - Engine and Mounting
Section 110-0030
elements and out through another passage in the filter
adaptor.
Engine coolant filter (38) and conditioner is a compact
bypass type unit with a replaceable spin-on type element
mounted on the gear case cover at the front right hand
side of engine (1). Refer to Section 210-0000,
COOLING SYSTEM.
There are two spin-on type fuel filters (37) mounted on
the left hand side of engine (1). The primary fuel filter
is in the fuel flow and acts as a strainer and the
secondary fuel filter filters the fuel after having passed
through the primary fuel filter.
QUANTUM ELECTRONIC FUEL CONTROL
SYSTEM
Description
Refer to Fig. 2.
WARNING
Before any welding is done on a machine
equipped with the Quantum Electronic Fuel
System, disconnect the following in this order:
Battery earth cable, battery supply cable,
alternator earth cables, alternator supply
cables, transmission black box connector,
ECM interface harness connector (30 pin RHS),
ECM power harness connector (5 pin RHS) and
ECM sensor harness connector (30 pin LHS).
Turn off ignition key switch to isolate the
batteries before disconnecting any
components.
After welding connect all of the above in the
reverse order.
The engine is equipped with Quantum Electronic Fuel
System which controls the timing and amount of fuel
injection by the electronic fuel system injectors. The
system also monitors several engine functions using
electrical sensors which send electrical signals to the
electronic control module (ECM). The ECM then
computes the incoming data and determines the
correct fuel output and timing for optimum power, fuel
economy and emissions.
The Quantum Electronic Fuel System also takes
action to prevent damage to the engine and, provides
the serviceman with diagnostic capabilities so that
problems can be corrected quickly and easily.
2
1. Electronic Control Module (ECM) - Receives
electronic inputs from the driver as well as from
mounted sensors that provide information
electronically, such as oil pressure and temperature
and intake manifold pressure. This information is
used to control both the quantity of fuel injected and
injection timing.
2. Programmable Read Only Memory (PROM) -
Located in the ECM and encoded with the operating
software. Additional information is programmed into
the EEPROM. This information controls the
horsepower rating, torque curve, maximum engine
speed and engine protection devices. The ECM
processes this information and sends electronic
signals to the Electronic Fuel System Injectors where
the precise amount of fuel is injected into the engine.
3. Electronic Fuel System Injectors - The injector is
a lightweight, compact unit that injects diesel fuel
directly into the combustion chamber. The amount of
fuel injected and the beginning of injection timing is
determined by the ECM. The ECM sends a command
pulse which activates the injector solenoid.
The injector performs four functions:
a - Creates the high fuel pressure required for efficient
injection.
b - Meters and injects the exact amount of fuel
required to handle the load.
c - Atomizes the fuel for mixing with the air in the
combustion chamber.
d - Permits continuous fuel flow for component cooling.
Electronic fuel system injectors are self compensating
and virtually eliminate engine tune-ups.
Note: Never apply 12 V directly to terminals on the
injector as it will burn out. Before removing injectors,
the fuel passages must be blown out to prevent fuel
flow from entering the cylinder head.
4. Batteries - Two 12 volt maintenance free batteries
supply the machine with electrical power to operate
all electrical components.
5. Electronic Foot Pedal - The electronic foot pedal
provides an electrical signal to the engine's fuel
control system in proportion to the degree of pedal
actuation.
Note: The electronically controlled engine will override
the electronic foot pedal position until the engine is
SM 1571 12-98