400 • SECTION 10 --- CHASSIS INFORMATION
NEPTUNE 2004
NOTE: Calibration procedures should be performed by a qualified
service technician. Calibration procedure will require both Empty and
Full potentiometers be adjusted.
Proper calibration is performed by calibrating the Empty side first, then the Full
side. Ensure the Fuel Tank is full prior to performing the following procedure.
1. Setting Empty:
• Place the sending unit in two inches of clean diesel fuel.
• Rotate both the full and empty potentiometers fully clockwise.
• Slowly adjust the Empty potentiometer counterclockwise until the needle on
the gauge just covers the empty mark.
• Rotate the potentiometer back clockwise slightly and then counterclockwise
to Empty ensuring the needle on the gauge is not below empty. The sender
will not show anything below the Empty mark.
2. Setting Full:
• Put sending unit in the full tank of fuel.
• Slowly turn Full potentiometer counterclockwise until the needle on the
gauge is down to the full mark.
Both adjustments should be verified several times to ensure proper calibration.
The key for proper adjustment technique is to start with the full adjustment screw
fully clockwise, and with a full tank of fuel. This causes the readings to be above
marks. Slowly adjust counterclockwise until the marks are reached. The intent is
to always adjust downscale rather than upscale.
Troubleshooting:
A. Fuel Only: One possibility, when there is a constant above full reading,
may be water in the bottom of the fuel tank. The sender will not work
correctly in conducting fluids such as water (it will read above full all
the time in water).
B. Electronic Output: The sender has a transistorized output. This prevents
an ohmmeter from getting a correct reading of its output resistance.
C. Contact Centroid: Probably 90% of the returns Centroid tests work
okay on the bench. If you have incorrect readings contact Centroid
(telephone: 800-423-3574 or, preferably, fax: 904-423-3709) with the
symptoms. A short,"fill in the blanks" troubleshooting test is provided,
appropriate to the sender. It is easier to find the problem that way than
after the sender has been removed from the system, since the problem
is not necessarily with the sender.
NOTE: Sending units are calibrated by length from the manufacture. If
replacing a sending unit and the sender needs cut, the empty setting will
require being set first.
Summary of Contents for Neptune 2004
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Page 84: ...84 SECTION 2 DRIVING SAFETY NEPTUNE 2004 Weight Label...
Page 90: ...90 SECTION 2 DRIVING SAFETY NEPTUNE 2004 020254...
Page 92: ...92 SECTION 2 DRIVING SAFETY NEPTUNE 2004 020255B...
Page 93: ...DRIVING SAFETY SECTION 2 93 NEPTUNE 2004 2 020263 Weight Record Sheet...
Page 94: ...94 SECTION 2 DRIVING SAFETY NEPTUNE 2004 VIEWS Front Rear 010726c 010725...
Page 95: ...DRIVING SAFETY SECTION 2 95 NEPTUNE 2004 2 Roadside Curbside 010723d 010724e...
Page 106: ...106 SECTION 2 DRIVING SAFETY NEPTUNE 2004 NOTES...
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Page 151: ...EXTERIOR INTERIOR CARE SECTION 3 151 NEPTUNE 2004 3 NOTES...
Page 152: ...152 SECTION 3 EXTERIOR INTERIOR CARE NEPTUNE 2004 NOTES...
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Page 191: ...4 APPLIANCES SECTION 4 191 NEPTUNE 2004 NOTES...
Page 192: ...192 SECTION 4 APPLIANCES NEPTUNE 2004 NOTES...
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Page 231: ...EQUIPMENT SECTION 5 231 NEPTUNE 2004 5 NOTES...
Page 232: ...232 SECTION 5 EQUIPMENT NEPTUNE 2004 NOTES...
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Page 255: ...WATER SYSTEMS SECTION 6 255 NEPTUNE 2004 NOTES 6...
Page 256: ...256 SECTION 6 WATER SYSTEMS NEPTUNE 2004 NOTES...
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Page 276: ...276 SECTION 7 LP GAS SYSTEMS NEPTUNE 2004 NOTES...
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Page 313: ...ELECTRICAL SYSTEMS HOUSE SECTION 8 313 NEPTUNE 2004 NOTES 8...
Page 314: ...314 SECTION 8 ELECTRICAL SYSTEMS HOUSE NEPTUNE 2004 NOTES...
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Page 346: ...346 SECTION 9 ELECTRICAL SYSTEMS CHASSIS NEPTUNE 2004 NOTES...
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Page 411: ...CHASSIS INFORMATION SECTION 10 411 NEPTUNE 2004 10 METRIC U S CONVERSION CHART...
Page 413: ...CHASSIS INFORMATION SECTION 10 413 NEPTUNE 2004 10...
Page 414: ...414 SECTION 10 CHASSIS INFORMATION NEPTUNE 2004...
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