CoachFiver
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Re: Onan hot hot hot
So I ran my sheet metal deflector this weekend, it did help. Temp was high 80's, high humidity with no shade. Generator ran for approximately 2.5-3 hours and then shut down. Took off front cover and scorching hot. Again opened small bolt on fuel bowl, no fuel in bowl. Touched fuel pump, and it is much cooler than before. The area that is under generator where intake cavity is, is much cooler using the deflector. But we are still either vapor locking or control board is getting too hot and shutting off fuel flow. Next plan is to heat tape rubber fuel line where it passes right next to the exhaust side of the generator. When doing some additional testing, the right side of the generator(exhaust side) is where the most extreme heat is coming from while running.(of course that makes sense) And that is where the fuel line connects. In fact the connection of the fuel line is literally a couple inches from the exhaust pipe as it drops down thru the bottom of the generator. Will have to try to get a picture of it with cover off.1.2KViews0likes0CommentsRe: Onan hot hot hot
Alright I have to post, hoping by posting here, I can get some feedback over starting a new post. I have a 2013 Raptor toy hauler 410 LEV with onboard Onan 5500 RVQG EVAP. When temp outside is hot(85+) generator will run until it gets good and hot and shut down. I've done a tone of testing, replace fuel filter, fuel pump, I run good premium gas, and done a lot of testing. It is definitely vapor locking. And I've proven it. It is because of the tremendous, and I mean unbelievable amount of heat that builds up under the generator between generator and ground. And yes there is plenty of room between generator and ground. That is also the same area where the fuel pump and fuel lines reside. I'm looking to resort to 1 of 2 options. Option #1, remove the generator, install a slide tray, reinstall the generator and then when using it in 85+ degree weather, slide the tray out so much more air can circulate. Option 2, and I did do some testing of this during the weekend. To build a heat deflector that pushes the high exhaust temperature air away from the cavity under the generator that houses the fuel pump, fuel lines and intake tube. Out of all the Onan's I've had I've never had one run this hot, and i'm talking so hot you can't touch anything behind the front cover. This cannot be normal.297Views0likes0CommentsRe: 2003 Itasca Sunrise 32V workhorse
Problem solved. After removing the cable, so I could work to find a replacement, I found a little burr. Not sure what it came from, almost looks like weld splatter, but took a file to it and made it nice and smooth. Works like a charm now.445Views0likes0CommentsRe: 2003 Itasca Sunrise 32V workhorse
So, yes when linkage is disconnected, the lever on the transmission will go thru all gears, park, r, n, od, d, 2, 1. When the column mechanism is disconnected from the linkage it will also go thru all gears. It seems like it might be aftermarket linkage. By my measurements, the linkage cable should have 4" of travel from park to first. My linkage cable seems to have 3.25" of travel. Need to start investigating if there is different cables with different travel.445Views0likes0CommentsRe: 2003 Itasca Sunrise 32V workhorse
So it turns out that the linkage cable doesn't allow for enough cable travel movement for the lever to move from park to first. Not sure if it is an aftermarket cable that was the wrong one or if it just was never adjusted properly. Going to try to adjust the ends to make it still work to reach park and then be able to reach 1st.445Views0likes0CommentsRe: 2003 Itasca Sunrise 32V workhorse
So I crawled under and had my son wiggle the shifter lever from drive trying to shift down into 2nd or 1st. When the shifter is in park, the lever on the transmission is almost horizontal. . When the shifter is in drive the lever on the transmission is almost vertical. I'm not sure with the angle of the linkage, that it can actually pull the lever forward anymore. Next step is disconnect the linkage and see if I can manually move the lever on the transmission forward more446Views0likes0CommentsRe: 2003 Itasca Sunrise 32V workhorse
So as you can see, the info is definitely not clear. Thanks for the info everyone. Another part that I learned, seems inaccurate, I thought all 8.1 had the Allison tranny and that if it had air bags it was the heavier chassis... Learned a lot from this thread. I'll check the cable. We do have a small exhaust leak near the exhaust manifold, so it could be that it shrank the plastic that the cable runs thru. Planning on taking a closer look at it this afternoon. Thanks again everyone.445Views0likes0Comments
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