Fuel Tank; Fuel Sender - Monaco DIPLOMAT 2004 Owner's Manual

Any fuel additives product should show supporting data for
performance and benefits. Engine failures caused by incorrect fuel are not
covered under warranty.
Maintenance of the fuel system is important, as it supplies the energy
with which the engine requires to run efficiently. Poor maintenance of the
fuel system can result in poor performance, premature failure of
components, and unexpected breakdowns. Inspect the entire fuel system
at oil change intervals for leaks, secure mounting, corrosion, and other
problems.

Fuel Tank:

The diesel fuel tank is made of 13-gauge steel. The total capacity is 90
gallons. The engine pick-up tube is cut at a 45-degree angle to allow
optimum flow to the engine.
NOTE: If the motorhome has been stored for any length of
time, check the vent for blockage. It is not uncommon for
insects to plug the vent tube. If the tank appears to be
pressurized the vent tube may be blocked. To inspect the vent
tube check on the curbside of the fuel tank, near the bottom.
Always store the motorhome with a full fuel tank.
The "Centroid" fuel sender has no moving parts and
works by measuring capacitance (electrical property)
between its inner and outer tubes in the tank. The more fuel
between the tubes, the higher the reading. Electronics in the
"hockey-puck" head of the sender convert the capacitance
to current to drive the fuel gauge.
The "Centroid" sender has four connections:
• Positive (POS) and Negative (NEG): Battery volt-
age to run the electronics in the sender head.
• SEND: Connects to the SEND terminal of the gauge on
the dash.
• ALARM: Makes a connection internally to the nega-
tive (NEG) terminal when the low fuel alarm level is
reached (when the fuel gauge is reading about 1/8 tank).
This turns on the low fuel indicator light on the dash
and is not adjustable.
CHASSIS INFORMATION
DIPLOMAT 2004
Full
Adjust
BLACK:
To Gauge
BLACK:
Ground
Fuel Sending Unit.

Fuel Sender

NOT
USED
RED:
Ignition
090318
10 • 419