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What to do if sender delamination occurs:
1. We have had reports of the senders literally falling off the tanks
or showing serious delamination. This is likely caused by a
lack of tank surface preparation. Surface prep is very simple,
wipe the area to be adhered to with products like Pro Bond,
alcohol, or acetone. Do not use thinners because they leave
residues which attack the adhesive. Ambient temperatures
of less than 15°C or 60°F prevent the bonding agents in the
adhesive from working properly; use a heat gun to warm the
tank surface if necessary. Also be sure the surface is dry, again
a heat gun is the best way to dry the bonding area. Finally,
the surface of the tank must be smooth. The adhesive works
much better on smooth surfaces, if necessary use an orbital
sander with fine grit paper (220 grit) to quickly accomplish the
desired smoothness.
2. Another possibility is the wiring harness pulling on the sender.
Make sure the wiring to the tank sender is well supported so
that it does not put a load on the sender. One simple way to
do this is to use Gorilla tape across the top of the sender at
a 90 degree angle to the sender orientation, with the wiring
held in place by the tape. The wires from the sender must be
routed straight up or to the right for reliable operation.
How to protect the sender from road spray and debris:
1. On installations where the holding tank is exposed to under
chassis road spray and flying rocks etc. we recommend the
use of an auto body undercoat, which is easily purchased in
auto parts stores. This tar based material clings well to the
senders and protects from water and debris.
2. One material in particular is 3M Professional Grade Rubberized
Undercoating, product code 03584. Another product that
works well is a Dominion Sure Seal rubberized undercoating
such as Gravel Guard Rocker Guard Coating.
3. After the system is completed and tested apply the undercoat
over the complete board using 2 coats. Do not use lacquer,
enamel paint, or plastic paint for auto bumpers as these
contain chemicals that will dissolve the conformal coating on
the board and cause malfunctions.
How to avoid damaging the display when mounting:
1. If mounting the display in a metal panel or wall there is a risk
of permanent damage due to a jagged opening or too small
of an opening. The metal panel can short circuit the display
Page 26
709-LL Manual
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