Reply
 
Thread Tools Display Modes
 
Old 01-07-2019, 05:27 PM   #21
Bus Nut
 
Join Date: Oct 2017
Location: Virginia
Posts: 787
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
On my 5.9 right after a cold start I will see 14 volts almost immediately, then it will go down to about 12 volts for 5-10 seconds, back up to 14, and repeat a few times before becoming stable at 14. This is the heater grid drawing it down.

You are not even getting up to 14 at all it appears
Ronnie is offline   Reply With Quote
Old 01-07-2019, 05:39 PM   #22
Bus Nut
 
Jolly Roger bus 223's Avatar
 
Join Date: Sep 2017
Location: Swansboro,NC
Posts: 807
Year: 86
Coachwork: Thomas
Chassis: Ford B700
Engine: 8.2
Rated Cap: 60 bodies
Jimburke. Regular old vacuum caps could work for that.
If the alternator isn't charging then you would die on the road cause there's nothing charging the system.
Is turfs alternator so close to the oil filter that it would scratch the paint on the filter on install and cause an uncovered power wire to ground out and cause a power drain?
Just asking?
My original battery issues were old light base grounding issues. Mainly the exterior mess.
They caused a parasitic drain after setting for a few days but my guage never went crazy.
I don't have any form of grid or block heater but he probably does.
To me? It sounds like he still has something drawing power even with his key/solenoid switches off.
The grid heater should not have power with the key off.
The alternator should not have power with the key off.
The starter should not have power with the key off.
AS well as pretty much anything else?
My tell tell sign for my lights was coming home around midnight one night and seeing my lights on the bus with a very dim reflection.
Yeah I was mucked up but that's what made me pay attention and I just barely saw it?
Good luck.
Sometimes it ain't much fun but when it's figured out and done it can be.
Jolly Roger bus 223 is offline   Reply With Quote
Old 01-07-2019, 06:19 PM   #23
Bus Nut
 
Join Date: Oct 2017
Location: Virginia
Posts: 787
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
the grid heater can be stuck on if the contacts inside the relay stick, has happened to me.
The alternator can draw power when off if the diode(s) is failing or failed

I do like the pull one fuse at a time method of checking for current draw.
Ronnie is offline   Reply With Quote
Old 01-07-2019, 06:23 PM   #24
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 11,359
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
Quote:
Originally Posted by Ronnie View Post
the grid heater can be stuck on if the contacts inside the relay stick, has happened to me.
The alternator can draw power when off if the diode(s) is failing or failed

I do like the pull one fuse at a time method of checking for current draw.

done this more than once!!! (pull 1 fuse at a time) and measure current pull from the batteries
-Christopher
cadillackid is offline   Reply With Quote
Old 01-07-2019, 06:35 PM   #25
Bus Crazy
 
turf's Avatar
 
Join Date: Apr 2013
Location: Colorado
Posts: 1,594
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
the video was after 30-45 minutes idling. the volts stated normal when in park, everything works fine. the alt shows charging. when i shift into drive, it slowly drains the battery. i took the video after it was up to temperature and the battery ran down to 11.3 mark.

if i shift back to nuetral, the battery starts to recover. the volts are upper 13 and the meter shows charging.

thanks for the help. its cold outside so work is slow, but i want to get on the road for skooliepalooza!
__________________
.
Turfmobile Build Thread
turf is offline   Reply With Quote
Old 01-07-2019, 06:37 PM   #26
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 11,359
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
the battery drains in D at idle or with the RPMs up too?
cadillackid is offline   Reply With Quote
Old 01-07-2019, 06:43 PM   #27
Bus Crazy
 
turf's Avatar
 
Join Date: Apr 2013
Location: Colorado
Posts: 1,594
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
it happens when i'm driving too, so that would be WOT 2500 rpm.
__________________
.
Turfmobile Build Thread
turf is offline   Reply With Quote
Old 01-07-2019, 06:58 PM   #28
Almost There
 
Join Date: Mar 2017
Location: Pasadena Tx
Posts: 80
Had it happen on a Cummins. Covered the terminals on the back, problem resolved. And it was from scraping the oil filter with the alternator. Because they're so close it happens. That is why I relocated my oil filter.
jimburke77502 is offline   Reply With Quote
Old 01-07-2019, 07:19 PM   #29
Bus Crazy
 
Join Date: Jun 2013
Location: Picton,Ont, Can.
Posts: 1,633
Year: 1997
Coachwork: Bluebird
Chassis: GMC
Engine: Cat 3116
Rated Cap: 72
Forget the drain for now, what does the alt put out at 2000 rpm? Gotta prove that to move on in checking.



That says more about its state then low idle where it puts out very little if any. Some don't put out unless rpm's are up there.


Place some rubber mat between the alt and oil filter to see if any change, then that eliminates that issue.


Is the starter well grounded with clean connections to ground and power both? Maybe it's pulling batteries down too.


Keep at it,


John
__________________
Question everything!
BlackJohn is offline   Reply With Quote
Old 01-08-2019, 07:42 AM   #30
Bus Crazy
 
Join Date: Jun 2013
Location: Picton,Ont, Can.
Posts: 1,633
Year: 1997
Coachwork: Bluebird
Chassis: GMC
Engine: Cat 3116
Rated Cap: 72
Quote:
Originally Posted by turf View Post

You didn't mention here that the video was shot with a warmed up engine.

So, I assumed it was a cold start, which would explain the guages fluctuating as heat was applied to the cylinders.

Wrong, was a waste of everyone's time due to lack of communication from you. Please do better than that.



I have to retract my comments for this because this is not normal for a warmed up engine.


What could the causes be?



Outside air temp (unknown), low idle, glow plug relay or grid whatever you have in that, starter issues.



Buses, diesel buses sit on high idle just for this reason. You add more fuel to build more heat which keeps the glowplugs from turning on.



Something is amiss for sure but you won't prove out the alt first for some reason. Does an alt voltage test read read 9vdc, 12vdc, or 14vdc or something else at 2000rpmat the alt?
At the pos battery terminal?

Last time I ask for this by the way.



Have you got a good cooling system, antifreeze, t'stat, flushed rad and block with correct antifreeze? You say the engine is warmed up without really knowing its operating temp which should be t'stat rating, say 180-190f I would think. Your temp guage is only a guideline not accurate enough to know what is going on precisely.



What else can be wrong? Ever work on the starter? Has anyone?

That is the only reason I can see for such a huge drain, if it is not being fully disengaged then those high current contacts inside are not opening.
Diesel combustion is a direct result of high compression, added to fuel and incoming air which will build up the temps.

Maybe you need a valve job, get a compression test done.

it might not be shimmed right and binding that mechanism to let it pull off.

Might be time for starter check if you can't do it, only way to be sure.



That's all I got this morning.


John
__________________
Question everything!
BlackJohn 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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:11 AM.


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