Engine And Generator; Normal Operating Characteristics; Basic Engine; Engine Manufacturer’s Equipment - Hobart 120CU20 Operation And Maintenance Manual With Illustrated Parts List

OM-2228 / Operation and Maintenance Manual
120CU20 / Series 500120 / 400 Hz. Generator Set
g) Normal Operating Characteristics.
Engine oil pressure (warm and at
rated speed 2000 RPM)
Engine coolant temperature
(normal operation)

7) Engine and Generator.

The engine and generator comprise the principal components of the generator set. They are mounted on
the welded steel frame of the chassis. The engine coolant radiator is also mounted on the frame just
forward of the engine-generator combination. Figures 2 and 3 are illustrations showing the location of all
major components and sub-assemblies.
a) Basic Engine.
The basic diesel engine is a fuel injection, 6-cylinder, electronically controlled engine rated at 220
horsepower.
b) Engine Manufacturer's Equipment.
As received from the engine manufacturer, the engine includes the following equipment, which is
more fully described in the engine manufacturer's operation manual.
(1) Electrical System.
The 12 VDC electrical generating and starting system includes an alternator, voltage regulator,
and starter with solenoid switch.
(2) Lubricity Additive Fuel Filter.
The fuel filter is a spin-on disposable type, located on the interior bulkhead located in the middle
of the unit, on the left-hand side. The fuel filter primary function, other than remove contaminants
from the fuel, is to automatically add a lubricity additive to the fuel. Although, the engine
manufacturer does not recommend low lubricity fuels, this additive can extends the life of the fuel
pump.
CAUTION
The use of low lubricity fuels can shorten life and/or damage the engine's fuel pump.
Only diesel fuel is recommended by the engine manufacturer.
(3) Oil Filter.
The engine oil filter is a spin-on, full-flow type, located on the left side of the engine near the front.
(4) Pre-programmed Electronic Control Module (ECM)
The ECM is a pre-programmed engine control module, mounted directly to the engine block.
October 15, 2013
45 PSI (310 kPa) minimum
50 to 65 PSI (345 to 448 kPA) typical
180 to 200º F (82 to 93º C)
Chapter 1-1
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