FUEL PRO
®
485
TECHNICAL MANUAL
®
F1485 REV B
T e c h n o l o g y , L L C
9
DAVCO Technology, LLC
www.davco.com
800-328-2611
1600 Woodland Drive, Saline, MI 48176-1629
VISUAL DIAGNOSTICS WITH CLEAR COVER
Fuel level is not at the top of the fuel filter .
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Normal - Do not change the filter .
Fuel level is at the top of the filter and appears to be full of wax .
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Change the filter - Run the engine for a minimum of 25 minutes at idle . Do not run at full RPM .
Bubbles are seen flowing in with the fuel .
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Check all fittings and lines from the fuel tank to the Fuel Processor . Check lower and upper collar
o-rings .
Fuel drains back to the fuel tank when changing the fuel filter or draining separator .
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Remove the check valve assembly . Clean or replace and retest . Check air leaks in the fuel system .
Fuel level is at the top of the filter . Low power .
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Change the filter at the first available opportunity .
There is a power complaint and the fuel level is below the collar .
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Check for a missing grommet at the lower end of the filter or missing/broken spring at top of filter .
Water is noticed in the cover .
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Drain the water .
