Mep805a voltage reg kit.

[Rikjames92]

I got this Gen set I ordered a voltage regulator kit but the transformer wasn't included. Now I have all new libby voltage regulator and the transformer is stamped "trc 39" are these compatible or do I need to order a libby transformer?

 

[kloppk]

The transformer in the second picture is not the transformer you need to check. In the picture is the current transformer. That one stays the same regardless if Libby or TRC.
Dud the set come with a bad Libby regulator in it or was it missing?

 

[Rikjames92]

The transformer in the second picture is not the transformer you need to check. In the picture is the current transformer.

OK so the T1 I changed is all need to change in that part of the generator. I also soldered a new rheostat. Can you help me locate r16?

 

[kloppk]

R16 is on the back of the 50/60 Hz switch

 

[kloppk]

T1 as I recall is the transformer you need to check to be sure it's the Libby version

 

[Rikjames92]

Does this look correct?

 

[kloppk]

That's the correct resistor for use with Libby Regulator

 

[kloppk]

Here are the part numbers for the Libby based voltage regulator setup

Libby Volt Regulator 6110-01-363-0493 P/N: 122-3054
Libby Volt Adjust Rheostat 5905-00-556-3350 P/N: 10K Ohms
Libby R16 Resister 5905-00-106-9354 P/N: 3K Ohms
Libby Power Transformer 5950-01-370-3328 122-7182

 

[kloppk]

Here is what the Libby T1 looks like

 

[Rikjames92]

Here are the part numbers for the Libby based voltage regulator setup

Libby Volt Regulator 6110-01-363-0493 P/N: 122-3054
Libby Volt Adjust Rheostat 5905-00-556-3350 P/N: 10K Ohms
Libby R16 Resister 5905-00-106-9354 P/N: 3K Ohms
Libby Power Transformer 5950-01-370-3328 122-7182

All my part numbers match. I have no voltage at the output terminals. I Must have a different problem then. I will proceed to troubleshoot. Thank you for your help.

 

[kloppk]

Do you have power at the outlet?
If so then the issue is the contactor isn't closing when you lift and release the contactor switch.
When running press the contactor lamp to test the light and see if it illuminates.
If it does lift and hold the up switch and see if the lamp illuminates.
If you release the switch does the lamp stay on or go out?

 

[Rikjames92]

Do you have power at the outlet?
If so then the issue is the contactor isn't closing when you lift and release the contactor switch.
When running press the contactor lamp to test the light and see if it illuminates.
If it does lift and hold the up switch and see if the lamp illuminates.
If you release the switch does the lamp stay on or go out?

You mean the s5 switch and light?

 

[kloppk]

Yes

 

[Rikjames92]

You mean the s5 switch and light?

They both work. Light tests good the problem is the frequency isn't adjusting. I'm going to test the governor control unit as I have one on hand

 

[Rikjames92]

I replaced a5 and it didn't make a difference. The frequency is not responding to the R2 switch being turned. I tried testing the A1 by removing wire 141A and probing between that in terminal 3 on the A1 and got less than 2 voltDCs. Tried the same thing on terminal 10 and 11 and got 107 VAC. It's a new regulator kit which makes me think that wasn't my problem to begin with

 

[kloppk]

Just a hunch but you may want to check the MPU. If it's not working the A5 won't know what the engine RPM is.

 

[Rikjames92]

Just a hunch but you may want to check the MPU. If it's not working the A5 won't know what the engine RPM is.

Sorry I'm still new to this. What is an MPU?

 

[Rikjames92]

Sorry I'm still new to this. What is an MPU?

Oh wait the pick up on the bellhousing?

 

[kloppk]

Magnetic Pickup Unit. It's a sensor screwed into the bellhousing and senses the lobes of the flywheel whizzing by and generates an AC voltage with varying frequency. The frequency it send out is used by the A5 to know what the engine RPM is.

 

[Rikjames92]

Magnetic Pickup Unit. It's a sensor screwed into the bellhousing and senses the lobes of the flywheel whizzing by and generates an AC voltage with varying frequency. The frequency it send out is used by the A5 to know what the engine RPM is.

Good looking out! I'll check. Look what happens when I get myself into a government job