T e c h n o l o g y , L L C
DIESEL PRO
®
245
TECHNICAL MANUAL FOR DTNA
11
www.davco.com
800-328-2611
Saline, MI 48176
P. O. Box 487
DAVCO Technology, LLC
F1353 REV B
FILTER CHANGE PROCEDURE
2. Turn off the engine. Remove the vent cap and dispose of
the o-ring. Clean the threads of the vent cap and on the
top of the cover. Set the vent cap aside.
3. Open the drain valve by turning one to one and a half rev-
olutions and drain the fuel completely from the unit, then
close the drain valve.
1-1.5x
1-1.5x
First Generation Drain
Second Generation Drain
4. Using the Collar Wrench, loosen the collar.
5. Remove the clear cover and collar from the Diesel Pro.
Discard the cover o-ring and install a new o-ring (sup-
plied with the filter) on the cover. Clean the threads on
the collar and the body of the Diesel Pro.
6. Install the new o-ring on vent cap (supplied with the
filter).
7. Remove the filter element from the Diesel Pro by pulling
upward.
8. Install the new filter element. Position the filter element
so the key is lined up with the keyway on the separator
plate of the housing. Use the arrow on the top of the
endplate to align the filter. Ensure the filter element is
fully seated by firmly pushing on the endplate. The filter
should not rotate freely.
Key
Endplate
Keyway
Arrow
Separator plate of the housing
9. After checking to make sure the new o-ring seal is seated
correctly on the base of the cover, install the cover and
collar. Apply downward pressure on the top of the cover
and rotate the collar until contact.
10. Use a DAVCO wrench if necessary to tighten 3 additional
ribs.
1
2
3
11. Prime the unit by filling the clear cover with clean diesel
fuel until it reaches the top of the filter.
12. Install the vent cap. Tighten the vent cap by hand until it
clicks.
13. Start the engine and run for one minute.
Slowly
open
the vent cap and allow the fuel to drop to about one inch
above the collar.
14. Tighten the vent cap by hand until it clicks.
