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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
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Alternator, Marelli type AA 125 R 14V 45A
Characteristics:
Nominal voltage ........................................ = 14V
Nominal current output ............................. = 45A
Maximum Rpm ......................................... = 14000 giri/1'
Maximum peak Rpm (for 15') ................... = 15000 giri/1'
Bearing, Pulley End .................................. = 6203-2Z
Bearing, Voltage Regulator End ............... = 6201-2Z/C3
Voltage regulator ...................................... = RTT 119 A
Rotation (viewed at puley end): Clockwise
Note: Use only high temperature grease when servicing bearings
Tighten nut 1 at a torque of 60 Nm.
Alternator, Marelli type AA 125 R 14V 45A - Performance Curve
The curve was obtained at room temperature of +25°C with a costant
13 V battery voltage.
P1 = Power Output (KW)
I = Current Output (Amps)
ηη
ηη
η = Efficiency
Note: The RPM shown is that of the alternator. The value of the
rpm axis must be multiplied by 1000.
Alternator speed is a function of engine speed and the
crankshaft pulley diameter. If the engine pulley is 88 mm,
then the alternator speed ration is 1.3:1. If the engine pulley
is 108 mm, then the alternator speed ratio is 1.6 : 1.
Electric System
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