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Old 08-20-2011, 08:59 PM   #1
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How do I remove the Onan generator? (Emerald III/Gasoline)

Okay, so I've got this "Bus" I'm working with (89' Eurocoach).... the generator turns over but doesn't start. Thought I'd try to pull it out to tinker with it. I can see where there are supposed to be some "slide" rails to move this thing in/out to work on.

Looks like the nut/bolts have been removed already.... if you look closely at pic's, both corners of the rails you can see angle iron with holes in them and no fasteners....

I think someone's modified the base support on the left side to hold something in place under the front wheel and there's a nut/bolt there. I'm sure that fastener will come out but figured I'd try and get the "base" and slide rails moving first.

Am I missing something here? I've tried using all my strength and a coupple of crowbars to get this to move I keep thinking there's a latch somewhere I can't see.

All I'm doing is bending up the bus's chasis!

Any help is greatly appreciated!


And one more thing.... Looks like that square box thingy next to the fuel pump is actually another fuel pump... it vibrates like hell when I put 12vdc to it but the round fuel pump doesn't seem to do anything.... Anybody know if just putting another pump in the line without removing the bad one would work?

Hell, I'm just guessing at this point fella's....
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Old 08-20-2011, 09:15 PM   #2
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Are you sure you want to remove it? Looks like you have more than enough room to work on it where it sits. Do you have the manual for it? If not I uploaded a Genset manual that may be your model
http://www.irv2.com/forums/downloads.php?do=cat&id=5
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Old 08-20-2011, 09:34 PM   #3
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The parts dealer (RV Parts Warehouse) I called sent me the "Parts" list with part numbers and diagrams but not the manual... That and a few troubleshooting guides I found online is all I have for literature right now. I'll have to buy it if it comes down to that... but i'm pretty sure if I can get to the parts, then I can figure it out... I just don't see how I can get to everything with no room... I'm half blind nowadays anyway and if I gotta work on it with my head 6" away from what it is I'm working on then I won't be able to see anything... even with the spec's on! I got a weak spark and no fuel it seems when I turned it over... I can't even get to the points/condenser that's in this thing...

How the heck do I pull this thing outta there?
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Old 08-21-2011, 12:07 AM   #4
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Not sure about the tray but if you have a 6.5NHE Spec D-P unit, then the manual you need is located here: http://www.google.com/url?q=http://w...JVGgjaWQ9Al5nw

I could not get the IVR2 download link to work.

The square box is a facet fuel pump. Not sure if the old round pump would block flow or not. Fuel pump ressure range is only 4-5 PSI.

You will just have to figure out the Sliding tray. Make sure exhaust, wiring, and/or fuel lines are not keeping it from moving. If that is a gas rig, then make sure you have more than 1/4 tank of gas in the tank the generator pulls from.

Dave
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Old 08-21-2011, 08:52 AM   #5
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Wow! Lots of useful information.... Thank you very much for the manual...

I've printed it out (1/2 ream of paper) and am footnoting the pages now... I'll let y'all know how i end up doin....

Thanks again!
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Old 08-21-2011, 09:20 AM   #6
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What's the "Spec" number on this generator?

Can someone help? I'm sure its something simple here...

Looks to me like its manufactured sometime in 89'... that's about all I can tell for sure.
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Old 08-21-2011, 09:25 AM   #7
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Call the Cummins Onan Customer Response Center at 1-800-888-6626. They can help you identify the model and specifications for your Onan generator.
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Old 08-21-2011, 11:58 AM   #8
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Does this mean something?

Okay, I'll call monday but was hoping this would be an easy question.... I found this online... does it mean this is a "spec E" unit?

http://www.cumminsonanstore.com/howto/

Anyone know fer sure please chime in!

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Old 08-29-2011, 05:52 PM   #9
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Well, looks like the bearings in the pull out rack are shot... I managed to pull it out with my "ingenuity" tools... (See pic's below) Called the Cummings dealer in Greensboro, NC and he has the rack setup for about $260.... I'm thinking about it!
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Old 08-29-2011, 07:40 PM   #10
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Did the fan somehow generate reverse airflow that allowed the sledgehammer to fall and pull the genset out? how did you get it out and does the rack come farther out still? Be careful it weighs a lot and wouldn't want it falling on any part of you.

What part of the rack is bad? Could you simply replace the roller bearings with new or possibly some very short lengths of galvanized 1/8 inch pipe?
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Old 08-29-2011, 07:44 PM   #11
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Sorry, did not know you had asked the decode question.

Dave

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Old 08-29-2011, 08:28 PM   #12
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BTW, you might be able to match replacement roller bearings. You would have to pull it all the way out to get to them though. Just be sure you realize that that the unit weighs over 230lbs. You will need some sort of support for the generator.

Dave
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Old 09-06-2011, 06:04 PM   #13
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Hey fella's!
Haven't messed with the RV for afew days now cause I thought I'd wait for the generator resistor before doing anything serious...

I did find another problem that evidentally happend when 240vac was fed through the 115v 50a shore power plug though...

I observed the Magnetec converter outputting about 21vdc when the generator was running... I also was hearing a loud "clicking" sound under the gas stove top.... It turned out the the neutral leg of the transfer switch comming from the generator wouldn't close....The transfer relay circuit board would sense the generator output and after about a minute, it would de-energize the normal shore power contactor and then energize the genset contactor... but then because of the bad neutral contacts, it would just start energizing/denergizing the coils and make a loud chatter where both coils were opening/closing constantly....this is when I'd measure 21v comming out of the converter (whenever i'd turn the breaker on at the dist. panel)

The unit seems to be working @ 13v when I'm connected to shore power though, so that's a good thing.

The shore power transfer switch is two 50a (mechanically interlocked) 3-pole contactors with 115v coils. Simple enough but the manufacturer made this dang gone thing so you can't get to the contacts to repair or replace them.... I used a small jewelers file to get in there and kinda "clean up" the contacts so that it would at least work for a test of the recent repair work I did to the generator.... but I told my friend that I wouldn't feel comfortable with this and it outta be replaced.... $156. at local supplier.... oh well.... its his money, not mine!

Anyway.... In response to the latest post,... I was thinking I could get my buddy out here and we'd remove the genset before I tried to mess with the rack.... maybe the bearings are replacable, I'll only figure that out once I can get the bad parts out.... and yea, I don't wanna get that genset fallin on me in the process.

Thanks for the help fella's! I'll update again soon! or when I get more $$$ to spend!
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Old 09-06-2011, 06:20 PM   #14
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That fan!!! HaHaHa

I'm on my third glass of wine right now... feeling kinda jovial right now and that last responce from "4knights" made my belley tickle.... It was about 103 degrees and on that hot concrete that day I was tinkering with it I needed some extra air flow to prevent my demise.... it was HOT!

Here's a few more pic's of the bearings & rail assy... Anyone know where I can get the bearings to fix this thing and save us $250 (+) ???

Thanks Ya'll!
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