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1951 4400 6V Charging Issue #1326623 Wed Sep 18 2019 03:14 AM
Joined: Mar 2006
Posts: 200
G
Gazz Offline OP
Shop Shark
Brought home a 1951 4400 yesterday, rather had it brought home knowing that it had this problem as the previous owner told me it would not charge and that the battery was new. So I read in the service manual how to check the charging system which requires the use of a ammeter which I do not have - all I do have is a VOM. Should I just take the generator and take it to the rebuild place to have them test it? Not very electrically inclined I guess.

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1950 3600
Gazz
Re: 1951 4400 6V Charging Issue [Re: Gazz] #1326644 Wed Sep 18 2019 11:19 AM
Joined: Sep 2001
Posts: 28,593
tclederman Offline
Boltergeist
"Should I just take the generator and take it to the rebuild place to have them test it? "

Yes, but take both the voltage regulator and the starter to the "rebuild place".

When you reinstall the generator and voltage regulator, be sure to repolarize them (as described in the Shop Manual).

An off-topic, but related, observation:
the Shop Manual says that some 6v positive ground and 6v negative ground voltage regulators are different.
A recent post said they were the same.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 48 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: 1951 4400 6V Charging Issue [Re: Gazz] #1326647 Wed Sep 18 2019 11:46 AM
Joined: Aug 2005
Posts: 8,683
Tiny Offline
Global Mod
Good advise there. One thing I would recommend you try before taking everything off is to repolarize it first. It's possible the previous owner did work on the truck that required the procedure and didn't do it. When you touch the wire, don't hold it in place for an extended period. You might "let the smoke out". All you need is one spark.


Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
Re: 1951 4400 6V Charging Issue [Re: Gazz] #1326674 Wed Sep 18 2019 03:33 PM
Joined: Sep 2019
Posts: 33
O
OhioSteve Offline
Wrench Fetcher
Cool Truck!


1948 1/2 Ton 6-volt 216
Re: 1951 4400 6V Charging Issue [Re: Gazz] #1326690 Wed Sep 18 2019 06:10 PM
Joined: Mar 2006
Posts: 200
G
Gazz Offline OP
Shop Shark
I took the generator and regulator out and took them to the shop. I did notice that one brush didn't have much pressure on it and when I got to the shop, the owner confirmed that it was a busted brush spring. I left it with him for a go-over and function test. He said at least a week turn around which is sort of bumming me out - I can't drive it and it is now in the way! Guess I'll find other things to do on it while it's sitting.


1950 3600
Gazz
Re: 1951 4400 6V Charging Issue [Re: Gazz] #1326742 Wed Sep 18 2019 11:52 PM
Joined: Feb 2004
Posts: 19,025
H
Hotrod Lincoln Online
Boltergeist
If you just need to move the truck a little go ahead and crank it up. It will run for a couple of minutes without causing any damage, even with the water pump not turning.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

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