 |
|
05-07-2023, 05:49 AM
|
#1
|
|
Member
Join Date: Jun 2021
Location: Hayden, Al
Posts: 42
|
Onan Problem
I have a 7000 watt gas Onan that runs great without the A/C turned on, but sometimes NOT every time it will stop running after the A/C has been on for a few hours...any ideas what the problem could be? I have had both coil packs & the fuel pump & spark plugs replaced.
This generator is in a 2007 32BA gas using a Ford chassis..
|
|
|
 |
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!
|
|
05-07-2023, 07:46 AM
|
#2
|
|
Senior Member
Join Date: Mar 2021
Posts: 380
|
Quote:
Originally Posted by hastemaker
I have a 7000 watt gas Onan that runs great without the A/C turned on, but sometimes NOT every time it will stop running after the A/C has been on for a few hours...any ideas what the problem could be? I have had both coil packs & the fuel pump & spark plugs replaced.
This generator is in a 2007 32BA gas using a Ford chassis..
|
Check your reluctor where your brushes are located and make sure the contact area where the brushes meet the reluctor are nice and clean. Should be nice and shiney. Bet they are both dark from your brushes. Good luck
|
|
|
|
|
05-07-2023, 09:16 AM
|
#3
|
|
Senior Member
Join Date: Aug 2017
Location: St. Louis, MO
Posts: 740
|
There is a company flight systems that makes after market Onan parts
They will set free troubleshooting calls with you to help us the problem
I’ve had 3 coaches two we gas generators
I took gents to Onan to repair four times and wasted my money
There after I used flight systems and repaired myself and fixed the root cause
https://www.flightsystems.com/
There’s a place on their site to request an appointment to discuss the problem
They will have you perform various tests and then call them back
Worked for me
|
|
|
|
|
05-07-2023, 09:30 AM
|
#4
|
|
Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,015
|
Overheating? Any codes?
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand! 
|
|
|
|
|
05-08-2023, 06:13 AM
|
#5
|
|
Member
Join Date: Jun 2021
Location: Hayden, Al
Posts: 42
|
No codes
|
|
|
|
|
05-08-2023, 10:03 AM
|
#6
|
|
Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Apr 2012
Location: Southern NM
Posts: 3,082
|
The generator should shutdown if it detects low oil or over heat. Maybe check out the sensors.
__________________
2018 Allegro Bus 37AP
2014 Phaeton 40 QBH (sold)
2022 Jeep JLURD
|
|
|
|
|
05-09-2023, 06:21 AM
|
#7
|
|
Member
Join Date: Jun 2021
Location: Hayden, Al
Posts: 42
|
It now has a 47 code which is ignition problem, code 47 was the same code it had when I replaced the coil packs & fuel pump & spark plugs...any ideas?
|
|
|
|
|
05-09-2023, 10:41 AM
|
#8
|
|
Senior Member
Join Date: Aug 2020
Location: Ohio
Posts: 2,274
|
When is last time you cleaned armature slip rings ?
Good luck and keep us posted
__________________
2000 southwind storm, workhorse custom chassis with 7.4l vortec
|
|
|
|
|
05-09-2023, 02:24 PM
|
#9
|
|
Senior Member
Join Date: Mar 2021
Posts: 380
|
Quote:
Originally Posted by hastemaker
It now has a 47 code which is ignition problem, code 47 was the same code it had when I replaced the coil packs & fuel pump & spark plugs...any ideas?
|
How long ago was it since you replaced those items? The control board could be bad and causing this issue as well. A place called Fight Systems manufactures aftermarket boards for these generators and I purchased one for my generator, it does not shut down like the original board does. I'm sure there is a company that can bench test your board for you so you could alleviate this as being a potential issue. Good Luck
|
|
|
|
|
05-10-2023, 06:27 AM
|
#10
|
|
Member
Join Date: Jun 2021
Location: Hayden, Al
Posts: 42
|
Those items were replaced 6 months ago, I will look into having the board tested.
|
|
|
|
|
05-16-2023, 03:58 PM
|
#11
|
|
Senior Member
Join Date: Apr 2014
Posts: 265
|
Tiffin used a second fuel filter between chassis and generator, look real good for it. I had same problem, it resolved after replacing the filter.
__________________
Ed & Kathleen
2003 Tiffin Allegro 40'
Jeep Liberty Tow
|
|
|
|
|
05-20-2023, 08:52 AM
|
#12
|
|
Member
Join Date: Jun 2021
Location: Hayden, Al
Posts: 42
|
Quote:
Originally Posted by donr103
When is last time you cleaned armature slip rings ?
Good luck and keep us posted
|
How often should the slip rings be cleaned?
Although this is 2007 model it only has 325 hrs on the generator.
|
|
|
|
|
05-20-2023, 11:03 AM
|
#13
|
|
Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,015
|
Quote:
Originally Posted by hastemaker
How often should the slip rings be cleaned?
Although this is 2007 model it only has 325 hrs on the generator.
|
The only time slip rings need cleaning is when they get corrosion from lack of use IMHO. I have never cleaned them in 20+ years, 2 different rigs.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
|
|
|
|
|
05-20-2023, 12:04 PM
|
#14
|
|
Senior Member
Join Date: Aug 2020
Location: Ohio
Posts: 2,274
|
You tube flight system gen repair.. or onan generator repair by flight system.. they explain why you need to keep slip rings clean.. you should be able to see them with a strong flashlight.. they need to be nice and shinny.. they can be cleaned in about 5mins.. cheapest and fastest place to start..
If that does not help.. you need to remember those critters.. they love to eat on fuel line.. or your fuel line is 16yrs old.. and transition to rubber over the tank.. and f/p will suck in air. Which will do this.. your carb may need cleaning.. you can do this.. without taking it apart or off generator.. see my old posts..
Good luck and keep us posted
__________________
2000 southwind storm, workhorse custom chassis with 7.4l vortec
|
|
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
