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Hello my friends
In this forum we are going to share our experiences and in this way we will learn about different ways to solve real problems.
Today We are going to try solve a question from Danny in West Palm Beach
Danny is working in a Kohler Generetor 21 KW Diesel . The generator is configurated in 240V / 60 Hz. The generator is running well however the voltage reading in between phase 1 and neutral is 120V and the reading between the second phase and neutral is 25 V.
Which could be your suggestion to solve the problem
I would start by testing the stator. To do that you would disconnect the wiring and check continuity between 1 and 2, 3 and 4. There should be no continuity between 1 and 3 and none between 4 and 2. There also should be none to ground.
I checked with my service Dept and they suggested the following
Most of the time this happens when you have a poor neutral connection. Typically that will throw both phases out of balance when measured to neutral, so possibly a poor connection on the 2nd phase at the point they are measuring. If you have a poor connection on the neutral, line to line will still be 240V and the two line to neutral voltages will be affected by the load applied to each. Damage usually ensues to the load when this happens.
Of course this is the typical poor neutral connection. Probably a loose connection or bad terminals at the neutral wires
How can I replace an engine’s alternator?
Hi Tim
First. Disconnect the Battery
Next: Loose the belt at the alternator Pulley
Next Take a picture of the alternator wiring connections
Next: Verify that the new alternator have exactly the same specifications in Amp, and Volt ( This is important) .
Next: Verify that the pulley of the new alternator be equal to the older one if not replace it.
next: install the new alternator following the same procedure
Before start the engine check the voltage of the Battery, then with the multimeter connected start the engine and verify that the voltage increase over 13.2 volts
Good Luck
Hi Tim
First. Disconnect the Battery
Next: Loose the belt at the alternator Pulley
Next Take a picture of the alternator wiring connections
Next: Verify that the new alternator have exactly the same specifications in Amp, and Volt ( This is important) .
Next: Verify that the pulley of the new alternator be equal to the older one if not replace it.
next: install the new alternator following the same procedure
Before start the engine check the voltage of the Battery, then with the multimeter connected start the engine and verify that the voltage increase over 13.2 volts
Good Luck
Potential back end issue. Would check winding
Yes John . Do not forget an open neutral. Regards
I was wondering where can buy your poster diagram. I don’t see it on the site. Yolanda
Hi Yoli.
If you want you can pass through my place on November to pick up the poster. I have a lot of posters.
Regards
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