Alternator

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ajhbike
501 Club
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Joined: Thu Mar 09, 2017 4:06 pm
Zip Code: 06405
Tractors Owned: 1957 Cub
1950 Cub
1951 Super C
1966 IH 504 Hi-Clear
1968 JD 3020
1949 Ferguson TO-20
1955 Ferguson TO-35
Location: Branford, CT

Alternator

Postby ajhbike » Mon Jul 26, 2021 5:59 am

I am converting Lorelei to 12V...bought the DB Electric single wire alternator and the brackets from Steiner. The Steiner brackets are for their alternator and sadly the slotted portion doesn't line up for belt adjustment. Soooo, I drilled a hole for it with what I think is the right belt tension. Is about a 1/4" play in the belt about right? If I have to, I will have a guy cut a bit of a slot, but where I have it drilled seems about right. Thoughts?

Also, I am using this wiring scheme...seem about right?
Attachments
20210726_065320 resized.jpg

Eugene
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Circle of Safety: Y
Location: Mo. Linn

Re: Alternator

Postby Eugene » Mon Jul 26, 2021 10:21 am

You need a bit of flex in the alternator drive belt. So may be a 1/4".

Wiring diagram would be correct providing the DB alternator is a true one wire alternator.

If you ignition coil has a built in resistor you do not need the ballast resistor.
I have an excuse. CRS.

ajhbike
501 Club
501 Club
Posts: 1280
Joined: Thu Mar 09, 2017 4:06 pm
Zip Code: 06405
Tractors Owned: 1957 Cub
1950 Cub
1951 Super C
1966 IH 504 Hi-Clear
1968 JD 3020
1949 Ferguson TO-20
1955 Ferguson TO-35
Location: Branford, CT

Re: Alternator

Postby ajhbike » Mon Jul 26, 2021 12:40 pm

Thanks.
I have about 1/4"
DB Alternator is a true 1 wire
Coil does not have the resistor.
I have 2 diagrams: 1 that says the coil wire and the alternator wire on the same post on the ammeter and the other that says they are on opposite posts...I can't see where there would be a difference since the ammeter is a pass through instrument.
Appreciate the feed back

Pap
Cub Star!!
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Zip Code: 38401
Tractors Owned: 1947 Cub ( Err Err )
I could not say tractor when I was 2 years old so I called it Err Err.

I loved this tractor then and I still love it now.
Circle of Safety: Y
Location: Columbia, Tennessee

Re: Alternator

Postby Pap » Mon Jul 26, 2021 5:28 pm

Thanks ajhbike. I think I might try to go with that.
Are We Having Fun Yet ? :D
'47 cub ( Err Err )

ajhbike
501 Club
501 Club
Posts: 1280
Joined: Thu Mar 09, 2017 4:06 pm
Zip Code: 06405
Tractors Owned: 1957 Cub
1950 Cub
1951 Super C
1966 IH 504 Hi-Clear
1968 JD 3020
1949 Ferguson TO-20
1955 Ferguson TO-35
Location: Branford, CT

Re: Alternator

Postby ajhbike » Mon Jul 26, 2021 5:44 pm

I put it all back together...enough so that I could crank it up. Started right up and was charging at 14.6V.
While I was "under the hood" I did the following:
New plugs
Oiled the fan hub
Rewired the lights
Changed the rear light toggle
Changed the rear light bulb and put in the LED bulbs from Steiner
Installed a flasher module and rear flashers
Cleaned out the fuel jet PITA holes
Put in a fuel filter
Topped off the TC fluid
Changed the ground cable that is now on the negative terminal because I broke the cable connector

Need to:
Top off the tranny fluid
Top off the final drives
Maybe change the points and condensor...some minor un-smoothness.

Fun time...step by step by step by step...good for an old guy with ADD

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Glen
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
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Location: Wa.

Re: Alternator

Postby Glen » Mon Jul 26, 2021 6:25 pm

Hi,
Below is a page from the 1955 Cub operator's manual showing the fan belt and generator belt tension at the lower right of the page.

http://farmallcub.com/rudi_cub/www.clea ... age-25.jpg

I suggest you put on a belt adjuster with a slot, if you have the hood off, and can get to the adjuster. The belt will probably wear as you use the Cub, and it will need tightening again.

The 2 wires at the ammeter have to be connected the correct way, so the ammeter shows charge when it is charging. If it is connected backwards it will show discharge when it is charging.

I have seen on here that too short a fan belt can cause problems with the generator, or alternator belt alignment up and down.
The new fan belts I buy at Case IH make the fan shaft a little less than half way up the slot that holds the fan assembly.
They only use the lower part of the slot for the fan to go down and loosen the belt.
I think too short a fan belt can make the gen or alternator belt hit on the parts below it. :)

ajhbike
501 Club
501 Club
Posts: 1280
Joined: Thu Mar 09, 2017 4:06 pm
Zip Code: 06405
Tractors Owned: 1957 Cub
1950 Cub
1951 Super C
1966 IH 504 Hi-Clear
1968 JD 3020
1949 Ferguson TO-20
1955 Ferguson TO-35
Location: Branford, CT

Re: Alternator

Postby ajhbike » Mon Jul 26, 2021 6:42 pm

It has good clearance, lines up, isn't too tight or too loose and is charging so the ammeter wiring seems okay.


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