Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 01-24-2023, 03:54 PM   #1
Junior Member
 
Join Date: Jun 2016
Posts: 12
Onan 4000 microlite stiff turning over

So I've had this thing down almost 3 times now due to dirty slip rings and an initial overhaul among other issues.

Now this time putting it back together I decided to torque the crank bolt to spec with a digital wrench (there is a rubber washer the bolt goes through on the fan hub). Felt stiffer but I figured it was OK. Of course it's on of these bolts where you don't "feel" a stop. Maybe due to rubber compressing?

Now back on the MH didn't even test it like an idiot and starter can barely turn the engine over. Should I even try reaching in there to loosen and retighten by hand?
missionst 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 01-24-2023, 04:42 PM   #2
Senior Member
 
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Jul 2005
Location: USA
Posts: 4,122
Recommend you pull it out again. Remove the blower wheel again and see what is out of place and causing the interference. Stop cranking it now to prevent further damage. Good luck!
__________________
TandW
TandW is offline   Reply With Quote
Old 01-24-2023, 10:22 PM   #3
Junior Member
 
Join Date: Jun 2016
Posts: 12
Onan Microlite Crank Bolt Torque

Hello all,

About to reach wits end with my onan KY 4000 Microlite.

Already dropped unit twice; once to clean slip rings, second to find a questionable wire from rings to stator.

Now this time I torqued the "crank" bolt that holds the fan hub on with the rubber washer underneath it. So how can it be torqued if there is a rubber component? It doesn't really have a "stop" and that seems to overtighten things.

So now the flywheel is harder to turn (I figured it was just loose before) and the starter can barely turn it over. I'm afraid I'll have to drop it again as I cannot stop the fan hub from turning with the cover on.
missionst is offline   Reply With Quote
Old 01-24-2023, 10:23 PM   #4
Junior Member
 
Join Date: Jun 2016
Posts: 12
The only difference is the bolt is much tighter because like I said I tried to use a digital torque wrench.

How do techs tighten them? The bolt never "stops" with the rubber washer!
missionst is offline   Reply With Quote
Old 01-25-2023, 07:20 AM   #5
Senior Member
 
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Jul 2005
Location: USA
Posts: 4,122
You have to pull it out and pull the wheel again. You've got an interference problem. The rotor shaft cone end hasn't contacted the wheel and so you are turning the rotor while hogging down on the bolt. Good luck!
__________________
TandW
TandW is offline   Reply With Quote
Old 01-25-2023, 07:55 AM   #6
Senior Member
 
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Jul 2005
Location: USA
Posts: 4,122
I know you are desperate, but you must retrace your steps. So sorry, but good luck!
__________________
TandW
TandW is offline   Reply With Quote
Old 01-25-2023, 11:38 AM   #7
Senior Member
 
Join Date: Jul 2018
Posts: 289
Iím at a loss as to what rubber washer your referring to? I donít remember a rubber washer anywhere.
randomledder is offline   Reply With Quote
Old 01-25-2023, 12:58 PM   #8
Junior Member
 
Join Date: Jun 2016
Posts: 12
Def a rubber washer behind that bolt on fan hub. Check the KY spec B parts sheet.
missionst is offline   Reply With Quote
Old 01-25-2023, 05:30 PM   #9
Senior Member
 
Join Date: Jul 2018
Posts: 289
Click image for larger version

Name:	IMG_3872.png
Views:	5
Size:	228.9 KB
ID:	385032
Is this what your referring too?
randomledder is offline   Reply With Quote
Old 01-25-2023, 07:38 PM   #10
Junior Member
 
Join Date: Jun 2016
Posts: 12
Yes, should be KY spec B.

I loosened and retorqued the bolt. Turn easier now. Definitely was too tight. Hate torquing anything with torque wrench when there is no "hard" stop. Was able to fire it up. Now dealing with another issue in new thread.
missionst is offline   Reply With Quote
Old 01-26-2023, 12:00 AM   #11
Junior Member
 
Join Date: Jun 2016
Posts: 12
I don't believe that they haven't contacted, actually the opposite. I believe the bolt was simply over tightened.

I was able to loosen the bolt and retighten it (I do not recommend this at all if you don't remove the generator and know what you're doing). I believe I could immediately hear the cone release slightly. Don't believe there was interference damage. Runs fine now.
missionst is offline   Reply With Quote
Reply

Tags
onan



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
Jayco Class C Onan Microlite 4000 Electrical Connections kbento Class C Motorhome Discussions 4 09-13-2012 08:37 PM
Onan 4000 microlite generator shutting down iceref63 MH-General Discussions & Problems 3 07-16-2012 12:17 PM
Onan Microlite 4000 spark plug removal JLPingree Class C Motorhome Discussions 2 09-21-2009 07:03 AM
4000 microlite Onan not starting art(alamoc) MH-General Discussions & Problems 4 07-15-2009 09:27 PM
onan microlite 4000 running problem fanblade MH-General Discussions & Problems 8 07-09-2006 02:08 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 04:26 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.