DIESEL PRO®243
TECHNICAL MANUAL
Technology, LLC
5
DAVCO Technology, LLC P. O. Box 487 Saline, MI 48176 800-328-2611 www.davco.com F1215 REV E
Installation Location
The Diesel Pro must be installed between the fuel tank and
the fuel transfer pump. In some cases, the Diesel Pro can
be used as the only fuel filter in the system. This is generally
dependent on the engine model year. Consult the engine
manufacturer for their recommendation. If the Diesel Pro
can be used as a single filter, DAVCO offers a diverter cap
to replace the secondary filter. (See Diverter Cap Installation
section)
Mounting the Diesel Pro
Mount the Diesel Pro keeping the following points in mind:
• Do not install the Diesel 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 replace-
ment (3.5" minimum).
• The Diesel Pro MUST be installed so that the Filter
Element is above the “FULL” level of the fuel tank. If
mounted below full tank level, a shut off valve will be
required at the inlet to allow filter changes without over-
flow of fuel.
1. With the engine shut down and at ambient temperature,
close the fuel shutoff valve (if equipped) and place a
suitable container under the fuel filters.
2. Remove the primary fuel filter element assembly, sedi-
menter, and/or water separator. Drain the used element
and dispose of it in an environmentally responsible
manner, according to state and/or federal (EPA) recom-
mendations. The fuel can be returned to the tank.
3. Mount the Diesel Pro in the desired location using 3/8"
Grade 8 hardware.
Fuel Line Routing
To minimize fuel system restriction, observe the follow-
ing 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 fit-
ting, which can cause check valve performance issues.
Make sure hoses are clean and free of debris before
installing.
• To avoid damaging the aluminum Diesel Pro body, do
not overtighten fuel lines or fuel line fittings.
1. Route the fuel supply line from the pick up on the fuel
tank to the Diesel Pro inlet (labeled “Fuel In”).
2. Route the fuel outlet line from the Diesel Pro outlet
(labeled “Fuel Out”) to the inlet of the fuel pump.
Note: The inlet and outlet fittings can be moved from
side to side depending on the applications needs. (Ex-
ample : FUEL IN right and FUEL OUT right, See Figure
2) Be sure to use only ONE INLET and ONE OUTLET
port per installation.
From Fuel Tank
To Lift Pump
Figure 1
INSTALLATION INSTRUCTIONS
