Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 03-09-2015, 02:30 PM   #1
Junior Member
Join Date: Mar 2015
Posts: 4
97 HR Imperial burning up alernators

Cummins 325 burning up alternators about every 20,000 miles. Any ideas? Thanks!!

neilmcc is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 03-09-2015, 02:41 PM   #2
Senior Member
dennis45's Avatar

Join Date: Jun 2012
Location: BC
Posts: 4,699
Are they new or rebuilt?
What shape are your batteries in? Have you ever load tested the batteries. Maybe overcharging due to faulty batteries OR bad connections both Positive and Negative.

Dennis & Carol
2003, 4006, 41' DutchStar, Spartan, ISC 8.3L W/BanksPower - 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake. And the 04 Bird, Sunshine Car.
dennis45 is offline   Reply With Quote
Old 03-09-2015, 03:13 PM   #3
Junior Member
Join Date: Mar 2015
Posts: 4
The alternator is rebuilt. Batteries are about 6 months old, I will check the connections.The dash meter for the alternator shows it charging at close to 15 amps all the time. Seems hi to me. This is the 3rd one burned up in 7 years. Thanks
neilmcc is offline   Reply With Quote
Old 03-09-2015, 05:17 PM   #4
Senior Member
Join Date: Jul 2014
Posts: 5,538
You probably mean volt meter, showing 15 volts.

Dash gauges are notoriously inaccurate, so a check with a digital volt meter, may give you a better idea of charging volts.

If it is charging at 15 volts, you will need to check the wiring that supplies voltage to the alternator regulator. ( one of the small wires )

If it is charging between 13 and 14 volts, all is good.

2 years on a rebuilt could be expected. Next time, if you haven't, get a genuine Cummins reman alternator.

Good luck
twinboat is online now   Reply With Quote
Old 03-09-2015, 05:39 PM   #5
Junior Member
Join Date: Mar 2015
Posts: 4
Thanks Dennis45 and Twinboat I will check on your ideas. It is a re-man of the original alternator leece nevell.
neilmcc is offline   Reply With Quote
Old 03-09-2015, 06:40 PM   #6
Senior Member
Join Date: Oct 2014
Posts: 281
If your rig is set up to charge A toad and house batteries etc. then it may be working the alternator to death as well. You may need to go to a larger alternator if that is the case.
keymastr is offline   Reply With Quote
Old 03-10-2015, 09:46 AM   #7
Junior Member
Join Date: Mar 2015
Posts: 4
We are not charging the toad but good idea. Checked the positive and negative connections they seem to be fine. Will check the small wires at the alternator next. Any thoughts about the BIRD being a problem? Thanks keymastr for the input!
neilmcc is offline   Reply With Quote
Old 03-10-2015, 09:51 AM   #8
Senior Member
Join Date: Feb 2010
Posts: 4,282
Check charging voltage at alternator and each battery.

If a diode based isolator voltage is adjusted higher to compensate.

Is relay type it is not.

If alternator adjusted for diode type and you have relay type then overcharging and strain on system components such as alternator.

So check voltages and confirm system configuration.

Tony & Lori
1989 Country Coach Savannah SE
TQ60 is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Boondocking Report: Imperial Dam LTVA, Near Yuma, AZ RussOnTheRoad Boondocking 13 02-14-2015 08:12 AM
94 Holiday Rambler Imperial Cuure Monaco Owner's Forum 2 06-22-2014 09:28 PM
MASSIVE RV Park FIRE - Old Orchard Beach, Maine - 10 (RVs) gone, 6 still burning :( EelKat iRV2.com General Discussion 12 05-09-2014 02:14 PM
Homeowner Burning Grass Lights Camper,Shed On Fire DriVer RV Industry Press 2 05-01-2014 11:44 AM
Generator burning oil Palazzoblues Palazzo Motorhomes 6 04-10-2014 02:39 AM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:33 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.