Owner`s manual

209
CHASSIS INFORMATION — 10
2008 LAPALMA XL
NOTE:
Due to the precise tolerances of diesel
injection systems, it is extremely
important that fuel be kept clean and
free of dirt or water. Dirt or water in the
system can cause severe damage to both
the fuel pump and the fuel injectors.
Fuel additives for lubricity are not
recommended. There are numerous
diesel fuel additives to help remove
moisture from fuel, prevent microbe
growth and to prevent gelling during
cold weather. Before adding any type
of fuel additive or extender, consult the
Manufacturer’s Owner’s Manual.
Fuel Tank
The diesel fuel tank is made of aluminum.
Pick-up and return lines are on the roadside
ends of the tank to inhibit fuel aeration. The
engine pickup tube is cut at a 45° angle to allow
optimum ow to the engine. The generator tube
is set to approximately ¼ of a tank. This will
prevent depleting the fuel supply while dry
camping.
NOTE:
Fill the fuel tank if the motorhome is
going to be stored for any length of
time to reduce the amount of potential
condensation. After storage, check
the vent tube for blockage. It is not
uncommon for insects to plug the vent
tube. If pressure or vacuum exists when
the fuel cap is removed, the vent tube
may be blocked. The end of the vent
tube is located on the curbside of the fuel
tank, near the bottom.
Fuel Sender
The Centroid
fuel sender
has no moving
parts and works
by measuring
electrical
property between
inner and outer
tubes in the
tank. The more
fuel between the tubes the higher the reading.
Electronics in the head of the sender convert the
capacitance to current to drive the fuel gauge.
Connections:
The Centroid sender has four connections:
1 and 2 - Positive (POS) and Negative
(NEG): Battery voltage to run the electronics
in the sender head.
3 - SEND: Connects to the SEND
terminal of the gauge on the dash.
4 - ALARM: Makes a connection
internally to the negative (NEG)
terminal when the low fuel alarm level
is reached (when the fuel gauge is
reading about 1/8 tank). This turns on
the fuel indicator on the liquid crystal
display on the speedometer and is not
adjustable.
Adjustments:
The Centroid sender has two adjustments:
1 - EMPTY: Adjusts for length of sender.
It is set at the factory, covered with a
sealant and should not be changed.
2 - FULL (Full Adjustment): The full
adjustment can be used to correct
for slight differences between fuel
meters. During installation it was
factory calibrated and does not need
re-adjustment.
The correct adjustment technique, with a full
tank of fuel, is to start with the full adjustment
screw completely clockwise. This should cause
the reading to be above full. Adjust slowly, rotate
counterclockwise, until the full mark on the
gauge is reached. The intent is to always adjust
downscale rather than upscale.
NOTE:
The adjustement must be made within
thirty seconds of turning on power. If
you don’t finish, turn the power off and
back on to get another thirty seconds of
adjustment time. Beyond thirty seconds
from power up, the sender responds too
slowly to changes to allow calibration
(“damped” output).
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