60 amp conversion wire on the m151

1959 - 1978, M151, M151A1, M151A2, Technical questions and discussions, regarding anything related to the M151.
keithjeep
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60 amp conversion wire on the m151

Post by keithjeep » Wed Feb 27, 2013 6:54 am

Hey , Does anybody know where the 27b wire at the end of this cable goes. It has a female end. Or is it not used on the m151. Thanks Keith


svramselaar
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Re: 60 amp conversion wire on the m151

Post by svramselaar » Wed Feb 27, 2013 11:15 pm

hi


it is coming from the contackt with the 27 wire
this wire split to 27B for the voltmeter (battery indicator ) and to 71 for the wipermotor
it go also to fuse 27 for the power to the other meters wire 27

george
1976 ? M 151 A2 AMG MUTT lost in acsedent
1978 M 416 A1 ( parkhurst ) trailer
1970 m151 A2 FORD BUDD tub
1957 Volvo sugga radio truck
M 274 mule HOME MADE MULE

keithjeep
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Re: 60 amp conversion wire on the m151

Post by keithjeep » Thu Feb 28, 2013 4:46 am

George, Thanks for the Reply. My jeep is a m151a1 with the vaccum wiper motors. I'm putting a a2 power pack with the mechanical fuel pump. So will that wire need to go through the fire wall to the battery inicator guage or is it not need for this a1 hook up? Thanks again Keith

Rickf
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Re: 60 amp conversion wire on the m151

Post by Rickf » Thu Feb 28, 2013 6:29 am

That wire is the field wire for the alternator, without it you will not get any charging. It needs to be hooked up to the ignition on side of the switch somewhere. It tells the alternator what the state of charge is and if the ignition is on or off.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

keithjeep
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Re: 60 amp conversion wire on the m151

Post by keithjeep » Thu Feb 28, 2013 7:17 am

That's my question Where?? Doesn't the cable end that is hooked in in place of the regulator take care of that???

Rickf
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Re: 60 amp conversion wire on the m151

Post by Rickf » Thu Feb 28, 2013 8:28 am

You should have three wires on the alternator, two large wires and one small wire. one large wire goes to the batteries and is the charging wire, the other large wire is a ground wire and goes to the body and the third small wire is the field wire I previously mentioned. The wiring diagram for a M-151A2 will give you a very good idea of what each wire does. There are NO spare wires. The adapter plug will address the charging wire and the ground wire but not the field wire, that is why it is so long.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

keithjeep
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Re: 60 amp conversion wire on the m151

Post by keithjeep » Thu Feb 28, 2013 9:17 am

Rick, The problem is I have a m151a1 that the original a 25 amp gen with regulator. I'm taking that engine out and replacing it with a a2 motor. which is 60 amp gen. I bought a 60 amp conversion wire that hooks in place of the regulator. It does not have a a2 wiring harness. I'm just using the conversion cable.

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Re: 60 amp conversion wire on the m151

Post by Rickf » Thu Feb 28, 2013 11:53 am

Correct, and if I remember correctly that conversion cable has a connector that attaches to the original plug that went to the regulator. In that new harness there should be two wires, one will be going to the batteries and should be electrically hot all the time and the other should be a ground and go back to the generator (alternator) frame. The other wire in that adapter harness should be a long thin wire and that would go inside the vehicle and there would be a special plug that would double up one of the connectors coming off of the switch.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

keithjeep
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Re: 60 amp conversion wire on the m151

Post by keithjeep » Thu Feb 28, 2013 12:11 pm

I'll check it out tonight. Thanks Keith

Rickf
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Re: 60 amp conversion wire on the m151

Post by Rickf » Thu Feb 28, 2013 1:21 pm

The special would have come with the adapter kit. It will not be on the harness unless someone left it there. They are available from most of the sellers who have electrical equipment.
Star ordinance
Vintage wiring of Maine
They are two that come to mind right off the bat.

Rick
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

keithjeep
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Re: 60 amp conversion wire on the m151

Post by keithjeep » Fri Mar 01, 2013 4:51 am

Rick, I see there is a 27 wire coming out of the switch. That must be where the 27b has to connect right? I did not get a adapter with the harness. Do you or can you get me the number for those who might,that you mention ? Thanks Keith

Rickf
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Re: 60 amp conversion wire on the m151

Post by Rickf » Fri Mar 01, 2013 5:19 am

I'll see what I can find tonight when I get home. I might even have some of them, I will look this weekend when I go to my storage trailer.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

keithjeep
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Re: 60 amp conversion wire on the m151

Post by keithjeep » Fri Mar 01, 2013 6:53 am

Rick, Thank you Keith

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Re: 60 amp conversion wire on the m151

Post by muttguru » Fri Mar 01, 2013 8:46 am

Keith,
here's your answer. The instructions were posted earlier by Kurt Lesser (as Kurt has posted this on the G503 before, I'm sure he won't mind me re-posting it here for you).

The 60 amp alternator and the 25 amp generator are the same
physical size and will directly interchange. There are "60 amp
conversion kits" on the market but for a 151 you don't need them and
they'd be a waste of your money, unless you want to keep everything
original. Then I'd suggest finding a 60 amp front wiring harness and
changing out the harness.

Heres the scoop:

1)DISCONNECT THE BATTERY!

2)Remove the 25 amp generator, regulator, and interconnecting cable.

3)Install the 60 amp alternator in place of the generator. You should
try to find the 3 sheeve pulleys for the alternator, crankshaft, and
water pump but the 2 sheeve pulleys will do unless you plan to use the
alternator near it's rated 60 amp output. If you can't find a matched
set of belts for the pulleys, ask your parts store to bring out their
inventory and then select belts with the same production dates on
them. Chances are they'll be close enough.

4)Tee a small (14 gauge) wire from the lead to the distributor to the
small wire on the alternator. This is +24 volts switched by the
ignition switch and becomes field exciter for the alternator. If you
want to bring a second wire thru the firewall you can pick this up off
of the ignition switch.

5)Run a heavy lead (8 gauge) from the output stud on the alternator
thru through one of the holes where your old regulator bolted in and
attach it to the stud on the starter footswitch where the heavy hot
lead coming from the battery attaches. Don't put it on the side with
the cable going to the starter. This is the electrical
connection into the system. Use a heavy insulated wire that won't
chaff where it goes through the hole. If you do it this way you
won't have to drill any holes in the firewall. Use another short
length of 8 gauge wire for a ground strap from the alternator frame to
the engine block.

6) Reconnect the battery and make sure the +24 volts to the field
(small wire) switches with the ignition switch. Start the engine and
check for +24 volts on the heavy output stud on the laternator and
you're ready to go.

7)Make sure to replace the cover and strain relief on the alternator.
You don't want a stray bolt blowing up your new alternator.

If you have a copy of TM-9 2320-218-20 (dated 1971)the wiring
information for the alternator is shown on page 2-46, figure 2-23. If
you cut off the large connector that used to go to the regulator you
can splice a wire to the lead marked 5 and run that over to the
alternator output stud. This is the heavy wire that will run to the
starter switch and then eventually over to the batteries. The lead
marked 3 is the frame ground. The lead marked 11 in the diagram
is the new wire coming over from either the switched lead to the
distributor or directly from the ignition switch.

Kurt Lesser

========================================================================================

For good measure, here's what Snuffy posted on the board a while ago....and Jeff confirmed the details about his kits for sale.

This alternator upgrade is currently on eBay for $24.99. You would have to bid more to get it. The changeover to an alternator from the 25 amp generator is a pretty simple job. Here's the Heathkit version:

1 Disconnect the battery

2 Remove the cable between the generator and regulator

3 Remove the generator

4 Remove the regulator

5 Mount the alternator

6 Ground the alternator frame to the engine

7 Remove the heavy 8 gauge wire from the connector in the vehicle harness that used to go to the regulator and connect it to the alternator output post (#5)

8 The smaller (field) cable needs to be connected to the ignition switch. This can be connected to the same lead that goes to the distributor. If you have a HMMWV alternator with 3 wires attach the wire marked #568 to the switch. The other connector is an AC sense lead that isn't used in the 151.

Don't "flash" the field the way you used to with a generator

9 Reconnect the batteries and test. If the output isn't in the green on the voltmeter there is a plug on the alternator near the connection point cover that can be removed to give you access to the voltage adjustment point with a screwdriver. Set the alternator so that you have 27 volts on the large output post.

Front Line has just the harness from the alternator to the original vehicle harness complete with the proper Cannon connector. All that's needed is to plug in the connector, connect to the alternator, and run 1 wire to the ignition switch. Real simple. Of course, there is the 3 belt setup to contend with.

Image
Jeff at Front Line Military Vehicles has them for $25 plus shipping (see above post).
http://www.flmv.net/" onclick="window.open(this.href);return false;
The harness is $25.00 plus shipping. Jeff
Contact address - muttguru@aol.com
Always wanted - Details and pictures of M416 Trailer data plates & M151 data plates & body-tags for my research. Thanks!

keithjeep
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Re: 60 amp conversion wire on the m151

Post by keithjeep » Mon Mar 04, 2013 10:11 am

Ken, Thank you. Keith


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