Alternator
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Illustration 1 | g00469612 |
Alternator Front View G3B Series (12 Volt 55 Amp) |
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Illustration 2 | g00469622 |
Alternator Side View G3B Series (12 Volt 55 Amp) |
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Illustration 3 | g00469623 |
Alternator Rear View G3B Series (12 Volt 55 Amp) |
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Alternator Specifications     | ||||
Caterpillar Part Number     | 105-2811     | 105-2812     | 144-9952     | 144-9954     |
Denso Part Number     | 101211-2240     | 101211-2310     | 101211-2780     | 101211-2770     |
Caterpillar Reman. Part Number     | 0R4327     | 0R9273     |     |     |
Slip Ring Outer Diameter Standard     | 14.4 mm     | 14.4 mm     | 14.4 mm     | 14.4 mm     |
Slip Ring Outer Diameter Service Limit     | 14.0 mm     | 14.0 mm     | 14.0 mm     | 14.0 mm     |
Brush Length Standard     | 10.5 mm     | 10.5 mm     | 10.5 mm     | 10.5 mm     |
Brush Length Service Limit     | 4.5 mm     | 4.5 mm     | 4.5 mm     | 4.5 mm     |
Pulley Nut Torque     | 94 - 127 Nm     | 94 - 127 Nm     | 94 - 127 Nm     | 94 - 127 Nm     |
Belt Tension     | 356 - 444 N (1)     | 356 - 444 N (1)     | 356 - 444 N (1)     | 356 - 444 N (1)     |
Battery Terminal Torque     | 5.9 - 8.9 Nm     | 5.9 - 8.9 Nm     | 5.9 - 8.9 Nm     | 5.9 - 8.9 Nm     |
Denso Series     | G3B     | G3B     | G3B     | G3B     |
Voltage Rating     | 12V     | 12V     | 12V     | 12V     |
Polarity     | Frame Ground     | Frame Ground     | Frame Ground     | Frame Ground     |
Minimum Output Current (Cold) at 5000 rpm     | 50A     | 50A     | 50A     | 50A     |
Regulating Voltage     | 14.2 ±.6     | 14.2 ±.6     | 14.2 ±.6     | 14.2 ±.6     |
Rotor Coil Resistance     | 2.9 ohms     | 2.9 ohms     | 2.9 ohms     | 2.9 ohms     |
Rotation     | CW     | CW     | CW     | CW     |
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( 1 ) | Initial Value. Readjustment Value Is 157 - 314 N. |
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Illustration 4 | g00481225 |
Alternator Front View K3A Series (12 Volt 90 Amp) |
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Illustration 5 | g00481224 |
Alternator Front View K3A Series (12 Volt 90 Amp) |
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Illustration 6 | g00481226 |
Alternator Front View K3A Series (12 Volt 90 Amp) |
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Alternator Specifications     | ||||
Caterpillar Part Number     | 105-2813     | 105-2814     | 144-9963     | 144-9964     |
Denso Part Number     | 101211-9020     | 101211-9010     | N/A     | N/A     |
Caterpillar Part Number     | 0R9274     | 0R4328     |     |     |
Slip Ring Outer Diameter Standard     | 14.4 mm     | 14.4 mm     | 14.4 mm     | 14.4 mm     |
Slip Ring Outer Diameter Service Limit     | 14.0 mm     | 14.0 mm     | 14.0 mm     | 14.0 mm     |
Brush Length Standard     | 10.5 mm     | 10.5 mm     | 10.5 mm     | 10.5 mm     |
Brush Length Service Limit     | 4.5 mm     | 4.5 mm     | 4.5 mm     | 4.5 mm     |
Pulley Nut Torque     | 94 - 127 Nm     | 94 - 127 Nm     | 94 - 127 Nm     | 94 - 127 Nm     |
Belt Tension     | 356 - 444 N (1)     | 356 - 444 N (1)     | 356 - 444 N (1)     | 356 - 444 N (1)     |
Battery Terminal Torque     | 5.9 - 8.9 Nm     | 5.9 - 8.9 Nm     | 5.9 - 8.9 Nm     | 5.9 - 8.9 Nm     |
Denso Series     | K3A     | K3A     | K3A     | K3A     |
Voltage Rating     | 12V     | 12V     | 12V     | 12V     |
Polarity     | Frame Ground     | Frame Ground     | Frame Ground     | Frame Ground     |
Minimum Output Current (Cold) At 5000 rpm     | 81A     | 81A     | 81A     | 81A     |
Regulating Voltage     | 14.2 ±.6     | 14.2 ±.6     | 14.2 ±.6     | 14.2 ±.6     |
Rotor Coil Resistance     | 2.9 ohms     | 2.9 ohms     | 2.9 ohms     | 2.9 ohms     |
Rotation     | CW     | CW     | CW     | CW     |
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( 1 ) | Initial Value. Readjustment Value Is 157 - 314 N. |
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Illustration 7 | g00481228 |
Alternator Front View L3A Series (24 Volt 60 Amp) |
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Illustration 8 | g00481227 |
Alternator Front View L3A Series (24 Volt 60 Amp) |
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Illustration 9 | g00481229 |
Alternator Front View L3A Series (24 Volt 60 Amp) |
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Alternator Specifications     | |
Caterpillar Part Number     | 3E-7772     |
Denso Part Number     | 101211-7920     |
Slip Ring Outer Diameter Standard     | 14.4 mm     |
Slip Ring Outer Diameter Service Limit     | 14.0 mm     |
Brush Length Standard     | 10.5 mm     |
Brush Length Service Limit     | 4.5 mm     |
Pulley Nut Torque     | 94 - 127 Nm     |
Belt Tension     | 356 - 444 N (1)     |
Battery Terminal Torque     | 5.9 - 9.8 Nm     |
Denso Series     | L3A     |
Voltage Rating     | 24V     |
Polarity     | Frame Ground     |
Minimum Output Current (Cold) At 5000 RPM     | 54A     |
Regulating Voltage     | 28 ±1     |
Rotor Coil Resistance     | 12 ohms     |
Rotation     | CW     |
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( 1 ) | Initial Value. Readjustment Value Is 157 - 314 N. |
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Illustration 10 | g00517877 |
Circuit Diagram For Denso G3B, K3A, And L3A Alternators (1) Stator Coil. (2) Rotor Coil. (3) Lamp Do not connect the "L" and "B" terminal directly. A lamp (3) must be connected in between "L" and "B" . |
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