ONL673L4 8/15
2
Servicing of industrial generator sets presents
unique problems. In many cases these generators
are far from a repair facility. Generators cannot be
compared to the servicing of automobiles, trucks or
even farm equipment. Failures often occur in remote
areas far from competent assistance. Generators
can be taxed far more severely than auto or truck
engines; therefore, maintenance schedules must be
adhered to more strictly.
Failures begin with minor problems that are
overlooked and become amplified when not
corrected during routine maintenance.
As operator, it is your obligation to learn about your
equipment and its proper maintenance. This is not a
comprehensive technical service manual. Nor will it
make the reader into an expert mechanic. Its aim is
to aid you in maintaining your unit properly.
Introduction
L, 4, E
NL -
Northern Lights industrial generator set
Model number of engine block
Bore Cylinders
67
mm
3
Serial Numbers
MODELS INCLUDED
This manual covers the operating instructions for:
NL673L4 & NL673L4E
industrial generator sets.
Model Numbers
Model numbers give the unit's application, block model, aspiration, and RPM:
L
= Designates new
series of generator set
4
= Tier IV compliant
E
= Electronic
+
+
Unit Identification
NL
673
Your set has three serial numbers: an engine number stamped
on the block, a generator plate, and a generator set plate.
Use the serial number on the generator set plate when ordering parts
or in correspondence. The generator set plate is found on the service
side of the generator and resembles the drawing in
Figure 1
.
Figure 1:
Generator set serial number plate.
Northern Lights industrial generator set with a 673
engine, TF-276D series generator end, AVR, and
Tier IV compliant.
Northern Lights industrial generator set with a
673 engine, TF-276D series generator end, AVR,
Electronic, and Tier IV compliant.
NL
673
L4
NL
673
L4E
=
=
