Reply
 
Thread Tools Display Modes
 
Old 12-01-2011, 01:05 PM   #1
Bus Nut
 
Seeria's Avatar
 
Join Date: Oct 2009
Location: Idaho
Posts: 575
Coachwork: Thomas
Alternator not charing battery (dt466)

SOLVED
Problem solved.
A recap for others that have similar problems. Batteries weren't getting a proper charge but alternator seemed to be working so after numerous talks with mechanics and forum folks, it was most often guessed the regulator was the problem.
After taking the vehicle to two shops in town, one an alternator specialist, we found that to be the problem. Our dt466 diesel international had a relatively new (6mth) old alternator which has the regulator inside. The alt was a "private label" from International, which we were told by a Int dealer this particular one tends to have regulator failures.

Replacing the alt with a brand new one fixed the problem of it sometimes not charging the batteries or charging barely enough.


Good thing for us is the alt was under warranty so total cost to replace was $30 (loved that...no full hour rate charge), took 15 minutes.

Hope this helps others with similar problems!!



-------------original --------------
Hello everyone! I've ran into a weird problem with Fran. She's sat for about a week and temps here are 50's days, 40's nights and we're on the coast about a mile from the ocean.

Went to start her and the beeps that go off while warming up (glowplugs) before cranking the engine were not the usual noise but a higher pitch beep. The voltage gage (think that is the name) says she's at 12 (black area) when she usually sits just over 14 (green area). She did start without a hitch though, ran her for about 15 minutes before turning her off.
Too scared to drive her as we're living in her, so if she breaks down I have to get a tow and not sure the campground we're in would allow us to sit here with a vehicle not working. Sure can't afford a mechanic at the moment.

Any suggestions on what the problem might be? What to check for, clean, test. The alternator is brand new this summer. Battery cables are a bit old but seem in good enough condition. One battery is new, one old (yeah I know... shame on me). Suggestions, please
Seeria is offline   Reply With Quote
Old 12-01-2011, 07:21 PM   #2
Bus Nut
 
bus-bro's Avatar
 
Join Date: May 2007
Location: Whidbey Island, WA.
Posts: 822
Year: 1984
Coachwork: Blue Bird
Chassis: All American
Engine: 3208 na boat anchor
Rated Cap: 2
Re: Weird beep during glowplug warm up (dt466)

Can you put a battery charger on it, and see if that changes the sound. A 3-stage battery charger is invaluable. I have a 8 amp Battery Minder and that thing has solved most my battery issues.
bus-bro is offline   Reply With Quote
Old 12-03-2011, 06:22 PM   #3
Mini-Skoolie
 
Join Date: May 2011
Posts: 16
Year: 1995
Engine: DT466e
Re: Weird beep during glowplug warm up (dt466)

I tested it with a multimeter today, the batteries appear to be fully charged, but they are not getting anything from the alternator. The alternator is about 6 months old now so I doubt it's dead yet lol so I'm thinking wiring, but I'm not sure where to start on checking those.

The beep didn't sound too far off this time though. We do have a charger, will probably have to plug it in to make sure they are topped off.
Dain is offline   Reply With Quote
Old 12-03-2011, 07:11 PM   #4
Bus Crazy
 
opus's Avatar
 
Join Date: May 2010
Location: Montana
Posts: 1,618
Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
Rated Cap: 72
Re: Weird beep during glowplug warm up (dt466)

Sounds like your beeper is going bad. Mine did that....still does at times.
opus is offline   Reply With Quote
Old 12-03-2011, 09:44 PM   #5
Bus Nut
 
Seeria's Avatar
 
Join Date: Oct 2009
Location: Idaho
Posts: 575
Coachwork: Thomas
Re: Weird beep during glowplug warm up (dt466)

heh I thought the same thing but that doesn't explain the drop from a 14charge to a 12 on the meter.
Seeria is offline   Reply With Quote
Old 12-03-2011, 10:00 PM   #6
wtd
Bus Nut
 
wtd's Avatar
 
Join Date: Jun 2005
Location: California City, CA
Posts: 267
Year: 1982
Coachwork: Thomas TransitLiner
Re: Weird beep during glowplug warm up (dt466)

I was thinking the charger was good for given them a bump, but what's making them go dead in the first place?
Did you check the current draw on the batteries when the bus is off, take off one of the battery leads and stick an ammeter in there? Shouldn't be more than a couple hundred mA, for the radio and whatnot.
Far from a mechanic, just that's what occurs to me - start at the beginning and work out.

Tom
__________________
The Rolling Motel Room
Where DIY meets WTF
wtd is offline   Reply With Quote
Old 12-03-2011, 10:01 PM   #7
Bus Crazy
 
opus's Avatar
 
Join Date: May 2010
Location: Montana
Posts: 1,618
Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
Rated Cap: 72
Re: Weird beep during glowplug warm up (dt466)

Quote:
Originally Posted by Seeria
heh I thought the same thing but that doesn't explain the drop from a 14charge to a 12 on the meter.
Sure it does...its shorting out while its doing it.
opus is offline   Reply With Quote
Old 12-03-2011, 11:13 PM   #8
Bus Nut
 
bus-bro's Avatar
 
Join Date: May 2007
Location: Whidbey Island, WA.
Posts: 822
Year: 1984
Coachwork: Blue Bird
Chassis: All American
Engine: 3208 na boat anchor
Rated Cap: 2
Re: Weird beep during glowplug warm up (dt466)

I had a 30 amp ground in the altenator cable on my bus. Usually I turn the battery switch off, but one day I was working on the bus and had the radio on. After about 30 minutes the radio went off. WTF? Found out I drained the battery. Did a resitance check between the positve lead and ground, 0.4 ohms! Then I disconnected the big wires from the power post, and checked the resistance to ground on each cable. Found the ground on the altenator cable. Wiggled the cable, and the ground went away. Guess I better fix it. Thanks for the reminder.
bus-bro is offline   Reply With Quote
Old 12-04-2011, 09:42 AM   #9
Bus Crazy
 
opus's Avatar
 
Join Date: May 2010
Location: Montana
Posts: 1,618
Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
Rated Cap: 72
Re: Weird beep during glowplug warm up (dt466)

When I park my bus I ALWAYS shut the master disconnect off. Most all buses have them.

I dont have any drains but I do it as habit, just incase something decides to happen.
opus is offline   Reply With Quote
Old 12-15-2011, 03:28 PM   #10
Mini-Skoolie
 
Join Date: May 2011
Posts: 16
Year: 1995
Engine: DT466e
Re: Weird beep during glowplug warm up (dt466)

We took her out for a test run yesterday.

When we left the batteries showed a 12.7 voltage on a multimeter. As she drove the dash panel voltmeter showed 12 with occasional dips when she ran blinkers or brakelights. When we stopped the batteries were down to 12.45 on the multimeter, letting her idle while See was in the store the batteries went back up to 12.58. Back at the campground she's running a the same. Setting them up on a charger now.

The alternator is producing electromagnetic field, so it is doing something from whaat I understand. It is just not making it to the engine/batteries.

All I have for testing now is a digital multimeter (without an amp testing setting). Any ideas where to go from here?
Dain is offline   Reply With Quote
Old 12-15-2011, 03:50 PM   #11
wtd
Bus Nut
 
wtd's Avatar
 
Join Date: Jun 2005
Location: California City, CA
Posts: 267
Year: 1982
Coachwork: Thomas TransitLiner
Re: Weird beep during glowplug warm up (dt466)

When the bus is running the voltmeter on the bus (or measured at the batteries with a multimeter) should be something north of 13 volts.
So I'm not sure where you get this ...
Quote:
The alternator is producing electromagnetic field, so it is doing something from whaat I understand. It is just not making it to the engine/batteries.
I'd suspect the alternator.
__________________
The Rolling Motel Room
Where DIY meets WTF
wtd is offline   Reply With Quote
Old 12-16-2011, 07:28 AM   #12
Bus Crazy
 
Join Date: Mar 2011
Location: Oregon/Philippines
Posts: 1,660
Re: Weird beep during glowplug warm up (dt466)

Previous post is correct. Also, you can pull the alternator and take it in to autozone, etc. I don't remember if kenect's tests them as he was originally from Greenacers by Coos Bay. And if you want a cheap 12v alternator that is new, you can install a 1 wire GM alternator -the late 70's one, and get a higher amp one instead of paying 300..... Of course you can take a lawn mower with a pulley and a cheap 1 wire chev alternator and make a great 12v generator... but thats not part of this topic.
__________________
Jesus Christ... Conversion in progress.
chev49 is offline   Reply With Quote
Old 01-03-2012, 04:23 PM   #13
Mini-Skoolie
 
Join Date: May 2011
Posts: 16
Year: 1995
Engine: DT466e
Re: Weird beep during glowplug warm up (dt466)

We are taking her in to check soon, can't do the alternator ourselves here.

The magnetic field idea was from a guy at the local marina who works with heavy trucks and farm equipment.

One thing that keeps popping up in other avenues of research to test is the voltage regulator (Supposed to tell the alternator to kick in/increase output). That it could be a separate unit, or part of the alternator depending on your model, and that it is a common cause of problems when the alternator is actually working. Does anyone know where that would be on this model? Trying to minimize the amount of time spent in the shop.
Dain is offline   Reply With Quote
Old 01-04-2012, 09:34 AM   #14
Bus Crazy
 
Stuff's Avatar
 
Join Date: Apr 2010
Location: Estevan, Saskatchewan, Canada
Posts: 1,485
Year: 1990
Coachwork: Goshen
Chassis: Ford
Engine: 7.3
Rated Cap: 25
Send a message via AIM to Stuff Send a message via MSN to Stuff
Re: Weird beep during glowplug warm up (dt466)

this is what i got. saved my new replaced batteries. luckily warranty covered the first pair that were killed from letting it sit over winter hooked up..

__________________
1990 E-350 Goshen Coach - 7.3L Diesel ---> http://www.skoolie.net/forum/viewtopic.php?f=36&t=5756

My Youtube channel - https://www.youtube.com/user/thestuffz
Stuff is offline   Reply With Quote
Old 01-04-2012, 09:48 AM   #15
Bus Nut
 
frank-id's Avatar
 
Join Date: Nov 2003
Location: Twin Falls, Idaho
Posts: 809
Battery cable disconnnect not good

As pictured, cable disconnect will not carry the 12-1500 amps required for engine starting. Easy method is removing any cable.
Best method for over winter storage is trickle charger and 24 hour timer. Charger comes on 2 times per day for an hour or two.
Fully charger battery is 12.6 volts............. Frank
frank-id is offline   Reply With Quote
Old 01-04-2012, 09:53 AM   #16
Bus Crazy
 
opus's Avatar
 
Join Date: May 2010
Location: Montana
Posts: 1,618
Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
Rated Cap: 72
Re: Weird beep during glowplug warm up (dt466)

Most school buses have a master disconnect switch on the frame.
opus is offline   Reply With Quote
Old 01-04-2012, 11:45 AM   #17
wtd
Bus Nut
 
wtd's Avatar
 
Join Date: Jun 2005
Location: California City, CA
Posts: 267
Year: 1982
Coachwork: Thomas TransitLiner
Re: Weird beep during glowplug warm up (dt466)

Quote:
Originally Posted by Dain
...
One thing that keeps popping up in other avenues of research to test is the voltage regulator (Supposed to tell the alternator to kick in/increase output). That it could be a separate unit, or part of the alternator depending on your model, and that it is a common cause of problems when the alternator is actually working. ...
You most likely have a 'one wire' Delco alternator, the regulator is internal.
The alternator is generally viewed as a 'works or it don't' part and replaced as a unit, rather than replacing components within it.

Tom
__________________
The Rolling Motel Room
Where DIY meets WTF
wtd is offline   Reply With Quote
Old 01-07-2012, 05:02 PM   #18
Mini-Skoolie
 
Join Date: May 2011
Posts: 16
Year: 1995
Engine: DT466e
Re: Weird beep during glowplug warm up (dt466)

Quote:
Originally Posted by wtd
Quote:
Originally Posted by Dain
...
One thing that keeps popping up in other avenues of research to test is the voltage regulator (Supposed to tell the alternator to kick in/increase output). That it could be a separate unit, or part of the alternator depending on your model, and that it is a common cause of problems when the alternator is actually working. ...
You most likely have a 'one wire' Delco alternator, the regulator is internal.
The alternator is generally viewed as a 'works or it don't' part and replaced as a unit, rather than replacing components within it.

Tom

Ours has a red cable, a white cable, and a small green wire running into it. Is that a one wire?
Dain is offline   Reply With Quote
Old 01-07-2012, 05:38 PM   #19
wtd
Bus Nut
 
wtd's Avatar
 
Join Date: Jun 2005
Location: California City, CA
Posts: 267
Year: 1982
Coachwork: Thomas TransitLiner
Re: Weird beep during glowplug warm up (dt466)

Quote:
Ours has a red cable, a white cable, and a small green wire running into it. Is that a one wire?
Got me That 'one wire' thing's kind of a misnomer, sorry. Most have a coupla wires coming off of them. I was kind of 'assuming' since the few dt466's I've seen had Delco alternators on them.

Doesn't it have a tag with manufacturers info or maybe a name/number stamped in it somewhere?
Would be easier knowing what brand it is.
__________________
The Rolling Motel Room
Where DIY meets WTF
wtd is offline   Reply With Quote
Old 01-08-2012, 09:34 AM   #20
Bus Crazy
 
Join Date: Mar 2011
Location: Oregon/Philippines
Posts: 1,660
Re: Weird beep during glowplug warm up (dt466)

above pictured disconnect will work, but i have found that they often corrode between the two parts, which aint good cause the engine might not crank over, etc.. For many years now, i have put regular high amperate disconnect switches that turn batteries off on little used heavy equipment. They aren't cheap, but work excellent.
__________________
Jesus Christ... Conversion in progress.
chev49 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Using the alternator to charge deep cell battery bikeforthelight Electrical, Charging and Solar 17 08-06-2019 11:51 AM
270 Amp Alternator for DT466 bhays Mechanical and Drivetrains 0 01-23-2012 09:41 PM
Alternator for a DT466 Seeria Mechanical and Drivetrains 2 05-06-2011 02:19 PM
Main Battery - Starting Battery Group 31? 8D? Tone Conversion Tutorials and How-to's 5 04-16-2009 05:02 PM
House battery system charged by solar & alternator rhclayto Conversion General Discussions 12 03-18-2008 09:27 AM

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 02:36 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×