12V starter? Axle/spring adaptability?
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Cargo Master
Joined: May 2008
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From: Bakersfield, CA
12V starter? Axle/spring adaptability?
1) How can you tell a 12V starter versus a 6V starter, with regards to 223ci engines? I grabbed a few starters a few years ago and never looked at them closely. I might be needing one soon.
2) Are front axle assemblies and front/rear leaf spring packs the same for all 53-56 F100?
2) Are front axle assemblies and front/rear leaf spring packs the same for all 53-56 F100?
Lead Driver
Joined: Jul 2003
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From: AKRON ohio
Using a 6 v starter in a 12 system is fine for limited usage. Meaning no long cranks. 12v in a 6v system isn't going to work.
53-54 rear springs are the same, but not the same as 55-56
front upper and lower shock brackets are different on the 56
front springs I've seen 5 leaf's up to 8 leafs. I'm really not sure what made the difference
53-54 rear springs are the same, but not the same as 55-56
front upper and lower shock brackets are different on the 56
front springs I've seen 5 leaf's up to 8 leafs. I'm really not sure what made the difference
Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,353
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From: Western NY
I find 6V starters to be of heavier duty (they need to be for the current involved - roughly twice as much as 12V) and they work just fine on 12V. Regardless of voltage, excessively long cranks are not good for starters.
Hotshot
Joined: Oct 2009
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From: Burbank, WA
If Kevin says he's seen something different, I would submit, based solely on the information available and shared here, that they may have been modified by someone other than Fomoco.
Lead Driver
Joined: Jul 2003
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From: AKRON ohio
According to the parts catalog, there was 3 different front spring sets available for the 53-56 F100/250 trucks that will interchange. An 8 leaf pack was standard on the F100. A 7 leaf pack was standard on F250 and shown as optional heavy duty for F100. And a third, 7 leaf front spring was available for F250 heavy duty.
If Kevin says he's seen something different, I would submit, based solely on the information available and shared here, that they may have been modified by someone other than Fomoco.
If Kevin says he's seen something different, I would submit, based solely on the information available and shared here, that they may have been modified by someone other than Fomoco.
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Cargo Master
Joined: May 2008
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From: Bakersfield, CA
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Lead Driver
Joined: Jul 2003
Posts: 9,361
Likes: 1,723
From: AKRON ohio
According to the parts catalog, there was 3 different front spring sets available for the 53-56 F100/250 trucks that will interchange. An 8 leaf pack was standard on the F100. A 7 leaf pack was standard on F250 and shown as optional heavy duty for F100. And a third, 7 leaf front spring was available for F250 heavy duty.
If Kevin says he's seen something different, I would submit, based solely on the information available and shared here, that they may have been modified by someone other than Fomoco.
If Kevin says he's seen something different, I would submit, based solely on the information available and shared here, that they may have been modified by someone other than Fomoco.
I go out and look at a junk 56 big window I have here and it looks original and it had 9 leaves on the front
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Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,353
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From: Western NY
There were 9 leaf rear springs from FoMoCo amongst others:
53/54 F100 7 Leaf
53/54 F100 8 Leaf
53/54 F100 9 Leaf
53/54 F100 9 Leaf (Heavy Duty)
55/56 F100 6 Leaf
55/56 F100 9 Leaf
55/56 F100 9 Leaf (Heavy Duty)
56 F100 7 Leaf Progressive
53/54 F100 7 Leaf
53/54 F100 8 Leaf
53/54 F100 9 Leaf
53/54 F100 9 Leaf (Heavy Duty)
55/56 F100 6 Leaf
55/56 F100 9 Leaf
55/56 F100 9 Leaf (Heavy Duty)
56 F100 7 Leaf Progressive
Cargo Master
Joined: Mar 2001
Posts: 2,759
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From: Elk River, MN
Help me out here on starters. I hate to appear dumber then I am, but 12V starters are - ground and 6v starters are + ground so if you connect a 6v starter to 12V - ground wiring system does the starter turn backwards? Too many beers tonight fogs me my brain.
Last edited by ranger pat; Aug 20, 2023 at 09:21 AM. Reason: Corrected polarity
Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,353
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From: Western NY
You are thinking of permanent magnet motors. The starter motors of our trucks use electromagnetic field coils and so the direction is determined by the internal wiring and the net result is the direction of rotation is polarity insensitive.
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