21407026 Volvo.Penta Belt

Table 1
Alternator Specifications
Peak Current Rating (Amps) Minimum Peak Current (Amps)
12 V Alternators
8C-5535 32 28
7N-4784, OR-5201 40 36
6T-1396, 7T-2096, 8C-5908, OR-3654 51 46
9W-2648, 9W-2949, 8T-9700, 105-2811(IG), OR-4327(IG), 105-2812(IG), OR-9273(IG), 34-3268, 68-4139, 3E-7295(D+), 7T-2876(D+), 100-8223 55 49
7G-7889 60 54
8C-5510(I), OR5200 61 55
8N-2268 75 68
3E-7892, OR-3616 85 77
105-2813(IG), OR-9274(IG), 105-2814(IG), OR-4328(IG), 149-2064(REG), OR-9410(REG), 9X-0341(D+) 90 81
8C-6163, OR-1699, 107-2519 105 95
167-7816 110 99
9X-6796, 9X-9096, 121-4134, 121-4136, OR-3527 115 104
3E-8827, 121-4135, 117-1379(I) 130 117
152-8746 135 122
125-9597, OR-8332 145 131
24 V Alternators
2P-1204, 3Y-8200 19 17
2Y-8310 21 19
6T-1395, 7T-2095, OR-3653 33 30
6N-9294, OR-5217, OR-3482 35 32
5N-5692, OR-2698 45 41
5S-9088, 100-5047, 112-5041, 3E-7578, OR-5206, OR-3667, OR-3668 50 45
109-2362, 9W-3043
, OR-3652(D+), 112-8032 55 50
3E-7772(IG), OR-9437(IG), 105-3132(IG), 4N-3986, OR-5203 60 54
155-7434, 132-2156(I), 107-7977(I), OR-8279(I) 70 63
169-4319, 167-7812 75 67.5
107-7976, 114-2401, OR-8997, 3E-7577, OR-3615 75 68
165-5140 100 90
9X-7803, OR-3749 100 90
Parts-Service Only Discontinued 12 V Alternators
6T-1193 18 16
7N-6118, 6N-5460, 4N-4540 40 36
6T-1195 42 38
7X-1340 45 41
9G-6079, 6T-1194 63 57
Parts-Service Only Discontinued 24 V Alternators
9G-6081, 6T-1196 40 36
D+ - Diode trio output. Alternator requires external excitation.
REG - Regulator Terminal. Alternator requires external excitation.
I - Ignition Terminal. Alternator can be externally excited through this terminal.
IG - Ignition Terminal. System voltage must be supplied to this terminal to turn on the alternator. Some of these alternators use the IG terminal as a sense terminal. Often when problems with the charging system are being investigated, the alternator is not the problem. If a low battery condition is present test the batteries first. See Special Instruction, SEHS7633, "Battery Test Procedure" for more information. If the engine cranks slowly, then test the starting system. See Service Magazine, SEPD0020, "Testing The Starter On The Engine" for more information. If a warning indicator for the charging system is ON, see Service Magazine, SEBD1751, "Difference Between Alternator Indicator In Electronic Monitoring System (EMS) And Low Voltage Indicator In Operating Monitoring System (OMS)". Note: Severely discharged batteries can cause low system voltage. Severely discharged batteries can occur even while the engine is running above idle, and the alternator is working properly. Proper low engine idle is also important.Test Step 1. DETERMINE THE ALTERNATOR EXCITATION METHOD.
Check the rear of your alternator in order to determine the method of excitation. See table 1 in order to verify the proper alternator excitation. Expected Result:Test method 1. These alternators have a "1", "REG", or "D+" terminal. Test method 2. These alternators are self-excited. Test method 3. These alternators have a "IG" terminal.Results:
Method 1 - The alternator has a "1", "REG", or "D+" terminal. Proceed to test step 2.
Method 2 - The alternator is self-excited. Proceed to test step 4.
Method 3 - The alternator has an "IG" terminal. Proceed to test step 3.Test Step 2. CHECK THE RESISTANCE IN THE EXCITATION CIRCUIT.
Turn the key start switch to the ON position.
Verify voltage at the excitation terminal. Connect the red lead from a multimeter to the excitation terminal. Connect the black lead to a ground source (alternator case ground).
Read the voltage that is shown on the multimeter. Expected Result:The voltage reads at least .2 volts.Results:
YES - The voltage reads .2 volts or more. The excitation circuit is correct. Proceed to test step 4.
NO - The voltage is less than .2 volts. There is a problem in the wiring harness to the alternator or there is a poor electrical connection. Correct the problem and operate the generator set. Watch for a recurrence of the problem.STOPTest Step 3. CHECK THE RESISTANCE IN THE EXCITATION CIRCUIT (CONTINUED).Note: This step is only for alternators with external excitation when the terminal for excitation is labeled: "IG".
Turn the key start switch to the ON position.
Verify voltage at the excitation terminal. Connect the red lead from a multimeter to the excitation terminal. Connect the black test lead to a ground source (alternator case ground). Note: For G3B, K3A, and L3A alternators, Insert a 7X-1710 Multimeter Probe Group into the rear of the middle wire in the connector. See figure 1 below. Insert the probes spoon lead between the seal and the wire