Holiday Neptune 2004, Owner'S Manual

Page: 324 / 416

324 • SECTION 9 --- ELECTRICAL SYSTEMS - CHASSIS NEPTUNE 2004
Specifications:
• 160 Amp standard.
• The integral rectifier system utilizes 12:50 Amp diodes mounted in
multiple aluminum heat sinks for efficient heat dissipation during
high-output operation.
• Aluminum housings.
• Bi-directional fan.
• Front bearing: 305 cartridge type.
• Enclosed brush system.
• Operation Ambient Temperature Range (-40º to 200º F).
• Negative Ground Configuration.
• Regulator Adjustment Range 13.6 to 15.4 Volts.
• Batteries may start to gas at 14.3 Volts.
• Max. Operating RPM 8000.
Alternator Testing Procedure:
• Check all wiring for burnt or loose electrical connections. Repair as
needed.
• Check all grounds and electrical connections to be sure they are clean
and tight.
a. Alternator ground to chassis frame.
b. Motor block ground to chassis frame.
c. Chassis battery ground to chassis frame.
Inspect the alternator for damage. A broken fan blade can
damage an alternator or make it out of balance.
• Check belt, pulley and fan for wear. Replace as needed.
• Never attempt to disconnect the battery or battery wire from the alternator
with the engine running. This can cause damage to the alternator or
the regulator.
• The pulley for the alternator should be torqued to 80 foot pounds.
• Chassis battery voltage, with the engine OFF, should range from 12.2
to 12.7 Volts DC.
• Chassis battery voltage with the engine at idle, should range 13.5 to
14.2 Volts DC.
• The output of the alternator range is 13.6 to 15.4 Volts DC. Connect a
voltmeter to the (B+) terminal of the alternator and
chassis ground. Idle the engine up to 1200 RPM.
• Connect a clamp-on amp-meter, if available, to the positive
battery cable to verify the battery state/rate of charge.
NOTE: Remember the alternator is not a battery charger, but
designed to maintain proper electrical system voltage. A battery
with a low state of charge, or a dead battery, may overheat and
damage the alternator.