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DESCRIPTION & OPERATION
Fuel Filtration System
To build up the extremely high pressures required
for improved combustion, unit pumps must have
an unrestricted supply of clean fuel. The
E-Tech™ filtration system, which utilizes a
primary and secondary filter element, was
designed to provide optimum balance between
filtration efficiency (micron size) and filter change
interval (restriction).
The main design features of the E-Tech™
filtration system include:
r
Fine micron media
r
Large diameter seal surface on both filters,
as well as different primary and secondary
thread sizes (to avoid mix-up with E7 filters)
r
Unique identification system (a red primary
filter and green secondary filter with black
logo and lettering, and two 1/4-inch black
bands, four inches from top of filter). Refer to
Figure 35.
It is mandatory to use these improved fuel filters
on E-Tech™
engines to protect the unit pumps
from contaminant damage to the very close-
toleranced internal components.
35
Figure 35 — Fuel Filters
The fuel filter mounting adapter is made from a
casting, on which the primary and secondary
mounting flanges are the same large size
(Figure 36). The adapter has metric thread spuds
for mounting the fuel filters. As has always been
the practice, primary and secondary spuds are
different sizes, so only the correct filter can be
installed at the proper location.
The correct fuel filter mounting adapter must be
used on the proper engine (E-Tech™
or E7) to
ensure the correct filters are used.
36
Figure 36 — Fuel Filter Mounting Adapter (with
Right-Side Mounted EECU)
V-MAC III monitors fuel temperature at the
secondary fuel filter outlet which supplies fuel to
the gallery feeding the unit pumps (early
production), or at the cylinder block fuel gallery
inlet (current production). This fuel temperature
data is used by the system to adjust fuel delivery
for optimized power and to provide accurate mpg
fuel consumption information shown on the
Co-Pilot display.
5_106_00.bk Page 34 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs
