DESCRIPTION AND OPERATION
Page 41
MACK Fuel Filtration System
On engines produced prior to December 22, 2003
and equipped with the MACK fuel filtration
system, the filters are integrated into a compact
unit with the fuel supply pump. This system is
referred to as “SPIFF” for Supply Pump with
Integrated Fuel Filters. Located on the right side
of the engine, the integrated system consisting of
a spin-on type fuel filter with improved efficiency
(3–5 microns) and a pre-pump screen filter
(Figure 37) replaces the traditional primary and
secondary fuel filter system.
Current-production engines (December 22, 2003
and later) use a chassis-mounted primary filter in
place of the pre-pump filter screen. The supply
pump with integrated secondary filter is retained.
However, the pre-pump filter screen is replaced
by a plug.
If the vehicle is equipped with the optional fuel
filtration system, then the fuel supply pump is
replaced with a traditional pump that does not
have the integral pre-pump screen and primary
filter.
37
Figure 37 — MACK Fuel Filtration System (SPIFF)
1. Fuel Pump
2. Spin-On Type Filter (3–5 Microns)
3. Pre-Pump Filter (Used in production prior to December 22,
2003; replaced by a plug and O-ring in later production.)
5-111.bk Page 41 Monday, July 10, 2006 2:26 PM
To Next Page
Loading...
