MEP802A Fuse Blowing

[dcvm]

802A when started didn’t produce power. I discovered the “little fuse” was blown so I took the fuse from a 803A and tried again. The voltage was neither 60hz nor 220V and the voltage adjust knob would adjust the voltage. I plugged in a drill and before Any power could be transferred the fuse blew again. I purchased a new voltage regulator but haven’t tested the machine again because I discovered that while the MOV 14D151k resistor had not been installed. The hour meter indicates 90 hours. Where else should I focus my attention while I wait for the resistor to arrive.

 

[loosegravel]

802A when started didn’t produce power. I discovered the “little fuse” was blown so I took the fuse from a 803A and tried again. The voltage was neither 60hz nor 220V and the voltage adjust knob would adjust the voltage. I plugged in a drill and before Any power could be transferred the fuse blew again. I purchased a new voltage regulator but haven’t tested the machine again because I discovered that while the MOV 14D151k resistor had not been installed. The hour meter indicates 90 hours. Where else should I focus my attention while I wait for the resistor to arrive.

Can you please take a photo of the fuse that you’re dealing with? Is it the one in this photo?

 

[loosegravel]

https://www.steelsoldiers.com/threads/mep-802-and-803-main-generator-tip.148791/ You may have already gone through this thread. If not, I would suggest reading it. Also it appears that much of the US is currently dealing with winter weather so the response time from many of the other members may be delayed. In the little pocket up here in the NW, its currently 40 degrees F and raining.

 

[kloppk]

The MOV IS NOT required to make the generator operator work properly.
The MOV is just an add on to help protect the factory AC Voltage from being damaged.

 

[Ray70]

Assuming you're talking about the VR Quad fuse mod. that @loosegravel depicted, make sure you have the right fuse in there. needs to be a 3A Slo-blow.... otherwise it won't work right.
If the fuse is correct maybe you should ohm out the exciter stator per the TM first?
pull off the tin cover on the end of the generator and test the F1 and F2 connections.

 

[kloppk]

The fuse should be a FNQ-R-3

 

[dcvm]

Can you please take a photo of the fuse that you’re dealing with? Is it the one in this photo?View attachment 892313

Yes, thats It.

 

[dcvm]

Assuming you're talking about the VR Quad fuse mod. that @loosegravel depicted, make sure you have the right fuse in there. needs to be a 3A Slo-blow.... otherwise it won't work right.
If the fuse is correct maybe you should ohm out the exciter stator per the TM first?
full off the tin cover on the end of the generator and test the F1 and F2 connections.

Thanks, I’ll check that out tomorrow.

 

[loosegravel]

Thanks, I’ll check that out tomorrow.

If you have the correct fuse in that quad fuse location, the next step would be to ohm out the exciter stator F1 & F2 terminals as Ray mentioned above. You will want to familiarize yourself with the TM's to get the correct direction in your trouble-shooting. Good luck!