FUEL PRO
®
485
TECHNICAL MANUAL
®
F1485 REV B
T e c h n o l o g y , L L C
5
DAVCO Technology, LLC
www.davco.com
800-328-2611
1600 Woodland Drive, Saline, MI 48176-1629
INSTALLATION INSTRUCTIONS
Installation Location
The Fuel Pro must be installed between the fuel tank and the
fuel transfer pump . In some cases, the Fuel Pro can be used
as the only fuel filter in the system . This is generally depen-
dent on the engine model year . Consult the engine manufac-
turer for their recommendation .
Mounting the Fuel Pro
•
Do not install the Fuel Pro directly on the engine .
•
Mount vertically with the cover and element pointing up .
•
Make sure there is enough top and side clearance for the
cover to be conveniently removed for filter replacement .
•
The Fuel Pro MUST be installed so that the filter element
is above the "FULL" level of the fuel tank .
E
The ignition key must be in the off position, unless oth-
erwise directed. To avoid unintentional engine startup,
use a lockout key and/or signage to alert personnel
that work is being performed. Chock the wheels.
1 . With the engine shut down and at ambient temperature,
close the fuel shutoff valve (if equipped) and place a suit-
able container under the fuel filters .
2 . Remove the primary fuel filter element assembly,
sedimenter, and/or water separator . Drain the used
element and dispose of it in an environmentally respon-
sible manner, according to state and/or federal (EPA)
recommendations .
Fuel Line Routing
To minimize fuel system restriction, observe the following
guidelines when plumbing the fuel system:
•
Keep the fuel line routing as smooth as possible with no
low-hanging loops which can trap water .
•
Use 90° elbows only when necessary .
•
If the fuel hoses are cut to length on the job, be sure that
the inner liner of the fuel hose is not cut by the fitting,
which can cause check valve performance issues . Make
sure hoses are clean and free of debris before installing .
•
To avoid damaging the aluminum Fuel Pro body, do not
over-tighten fuel lines or fuel line fittings .
1 . Route the fuel supply line from the pick up on the fuel
tank to the Fuel Pro inlet (labeled “FUEL IN” on figure
below, not labeled on housing) .
2 . Route the fuel outlet line from the Fuel Pro outlet (labeled
“FUEL OUT”) to the inlet of the fuel pump .
Priming the Fuel System
1 . Check to make sure the drain valve at the base of the
Fuel Pro is closed .
2 . Remove the vent cap from the top of the clear cover . Fill
the Fuel Pro full with clean fuel . Re-install the vent cap .
Tighten the vent cap by hand until it clicks .
3 . Start the engine . When the lubrication system reaches its
normal operating pressure, increase engine RPM to high
idle for one to two minutes . After the air is purged loosen
the vent cap until the fuel level lowers to just above the
collar . Tighten the vent cap by hand until it clicks .
4 . Apply downward pressure on the top of the cover and
rotate the collar until contact .
5 . Use a DAVCO wrench if necessary to tighten 3 additional
ribs . .
The clear filter cover will not fill completely during engine
operation . It will gradually fill over time and the fuel level will
rise as the filter becomes contaminated .
FUEL IN
FUEL OUT
