Section 110-0030
Engine - Engine and Mounting
SM 1691 Rev 1 11-99
2
parts of engine (1). The oil is forced by pump pressure
through a passage in the filter adaptor and into the
elements. Impurities are filtered out as the oil passes
through the elements and out through another
passage in the filter adaptor.
Engine coolant filter (3) 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).
The spin-on type fuel filter (4) is mounted on the left
hand side of engine (1). The fuel filter (4) is in the fuel
flow and acts as a strainer.
HEUI ELECTRONIC CONTROL SYSTEM
Description
Refer to Fig. 3.
WARNING
Before any welding is done on a machine
equipped with the HEUI electronic
management system, disconnect the following
in this order: Battery earth cable, battery
supply cable, alternator earth cables, alternator
supply cables, front & rear transmission ECU
connectors (located behind access door below
cab door) and front & rear engine ECU
connectors (located on LH side of engine).
Turn off battery master switch before
disconnecting any components.
After welding connect all of the above in the
reverse order.
This machine is equipped with the HEUI electronic
management system which continually monitors the
engine and warns the operator when a problem
develops. The 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.
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.
SM - 2098
Fig. 2 - Lube Oil Filter Lines
1 - Adaptor
2 - Elbow
3 - Hose
4 - Elbow
2
4
1
4
2
2
3
3
1
ENGINE LUB. FILTER
ENGINE
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