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Re: Alternator output low Posted by DougM [Email] (#211) [Profile/Gallery] (more from DougM) on Sat, 24 Jan 2004 12:37:51 In Reply to: Alternator output low, LJB, Fri, 23 Jan 2004 16:39:03 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Testing at 2/3 maximum current - connect the battery and load the alternator. Adjust the alternator speed to exactly 2000 rev/minute. The alternator must then deliver two-thirds the maximum current = 36A(if it's a 55A alternator)...43A if it's a 65A alternator.
Checking speed for maximum output - connect the battery. Load the alternator and run it until warm. Increase the speed. The maximum output 55A or 65A respectively at 14V should be obtained within the speed range 2700-3700 rev/minute.(alternator speed)
Alternator not charging
the cause may be
a) slack drive belt
b) break in charging circuit and return circuit to ground
c) defective electric brushes
d) shorted diodes
e) break in exciter circuit
f) faulty regulator
g) broken rotor winding
h) grounded stator
i) exciter diode unit ground connection broken or shorted
Low or irregular amperage
the cause may be
a) slack drive belt
b) irregular breaking in the charging circuit
c) worn electric brushes
d) faulty regulator
e) broken or shorted rectifier diode
f) partly shorted rotor
g) stator ground connection broken or partly shorted
I recently bought a re-manned alternator from ebay for something like $30 just to have a spare. You might try there to get a decent price on one.
posted by 68.68.16...
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