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Workshop Manual LDW CHD _ cod.
Electric system
Alternator type Marelli AA 125 R 14V 65A
Characteristics:
Rated voltage ............................14V
Rated current .............................65A
Max. speed ................................14.000 giri/1'
Peak speed (max 15 min) .........15.000 rpm
Bearing on control side ..............6203.2z
Bearing on manifold side ...........6201-2z/C3
Voltage regulator .......................RTT 119 AC
RH direction of rotation.
Tighten the nut 1 to 60 Nm.
Note: Lube the two bearings with high temperature grease.
Characteristic curves for alternator type Marelli AA 125 R
14V 65A
The curves have been detected with electronic voltage regulator
after thermal stabilization at 25°C; test voltage 13.5 V.
P1 = Power in kW
I = Current in Ampere
η
= Alternator efficiency
Note: The alternator rpm is equal to the rpm shown in the table
Characteristic voltage curve for regulator type RTT 119 AC
The electronic voltage regulator is built into the alternator.
The curve changes depending on temperature.
A = Max. voltage curve
B = Min. voltage curve
ED0053031210 - 1° ed_rev. 00
The alternator has a W terminal for a speed indicator.
multiplied by 1000.
Ratio between engine/alternator rpm = 1:1.8
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