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  #1  
Old April 26th, 2020, 01:24 PM
Bpmalo Bpmalo is offline
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Default Building 68 M715; converting to aCummins 4BT looking for guidance

Hey gang, brand new to the forum. Just bought today a 1968 M715. Best I have seen. No rust, bone stock and its all there.
Want to put a cummins 4bt in it.
Looking for advise from those that have done this.
1) electrical, converting from 24v to 12v; best ways to do that.
2) recommended axles
3) dos and dont, things to do, look out for converting to the 4bt.
Any advice you wish to drop on me is greatly appreciated.
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Old April 26th, 2020, 01:25 PM
Bpmalo Bpmalo is offline
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Default More pics

Adding a few more...
Attached Images
File Type: jpg 9CCA1787-ED70-4BC4-8776-F7DE367C02C3.jpg (166.6 KB, 2 views)
File Type: jpg 03A05A1B-D9E1-479E-857D-F0528A239A24.jpg (88.6 KB, 4 views)
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Old April 26th, 2020, 04:03 PM
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brute4c brute4c is offline
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WELCOME!!

At the top of the page is a link to the Online Maintenance Manuals...lots of good stuff in there...ask away with questions too!
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Old April 26th, 2020, 06:55 PM
Bpmalo Bpmalo is offline
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Thanks Brute, I missed the manuals. Wow...awesome. Thanks,
I will have lots of questions!
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Old April 27th, 2020, 03:07 AM
ray steadward ray steadward is offline
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Welcome! I know Mikel has a 4bt and 6bt truck and is usually great with pics so search for his threads. The 12 volt conversion might just be bulbs if you are already doing the alternator and starter...There is a good axle sticky at the top of modified and in some of the build threads...And ask away...
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Old April 27th, 2020, 05:24 AM
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brute4c brute4c is offline
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From what I can see under the hood, you have the early style turn signals with the large distribution box. Those boxes dont convert to 12 volt unless you are good at electronics and can redo the relays inside there...we have a page on that:
http://www.m715zone.com/vb/view.php?...istbox_convert

You also can convert the system to the newer style military turn signals setup, solid state type. This is documented on the following linked page:
http://www.m715zone.com/vb/view.php?...signal_convert

With either of these changes, the turn signal/lighting system will work on 12 volts as long as you also change the bulbs to 12 volt...the GE part numbers can be converted from 6 to 12 to 24 volt with this chart:
http://www.m715zone.com/vb/pages/man...rsionChart.pdf

If you want to mount the blackout light on the hood, you would need to convert it to 12 volt...we have a page on that too:
http://www.m715zone.com/vb/view.php?...dlight_convert

Those are all in the Online Manuals section in case you need them in the future.
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Old April 27th, 2020, 07:03 AM
Bpmalo Bpmalo is offline
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That is great. I messaged Mikel. Thanks Ray!
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Old April 27th, 2020, 07:04 AM
Bpmalo Bpmalo is offline
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Brute, you are the man, this stuff is so helpful, I can’t thank you enough!
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Old April 28th, 2020, 01:33 PM
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Any questions, let me know... axle and cummins swapped...

Otherwise see my build thread too!

1967 Kaiser Jeep M-715 6BT Build



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