jrock Report post Posted April 12, 2017 Was changing oil and filters on a onan 7500QD when I loosened up the fuel filter fittings I waited for ever for fuel to drain. Was wondering if fuel was running from tank or I just didn't wait long enough for filter to drain. I seamed to get more than the filter holds. Share this post Link to post Share on other sites
abyrd Report post Posted April 12, 2017 I have changed my 7500QD several times, don't remember how long it takes it to drain. I us a large rubber maid tub to catch the fuel. I know it's hard to remove the filter without having the fuel run down your arm. I just assumed that the fuel would not siphon through the electric fuel pump. Jim Share this post Link to post Share on other sites
jrock Report post Posted April 12, 2017 Maybe I just didn't wait long enough this was the first time. Oil was a Walk in the park. Share this post Link to post Share on other sites
wolfe10 Report post Posted April 13, 2017 Generator or main engine-- if the level of fuel in the fuel tank is higher than the filter head, fuel will run out until it reaches the same level! Share this post Link to post Share on other sites
manholt Report post Posted April 13, 2017 Like everything else...Liquid, sand or rice! I try to go in for service, with the intention to fill up with fuel after. Share this post Link to post Share on other sites
jleamont Report post Posted April 13, 2017 Call me crazy but I pull the side cover off and service it from there. No oil or fuel running down my arm, while the cover is off I can look around for anything else that might be a concern, chaffed wires, mice nests, belt condition etc.... Share this post Link to post Share on other sites
manholt Report post Posted April 13, 2017 Good thinking! I have mud dabber issues on occasion, they'll build their condos, just about anywhere! Share this post Link to post Share on other sites
jleamont Report post Posted April 13, 2017 19 minutes ago, manholt said: mud dabber We get them also up here. Usually on the exterior walls of the house. Share this post Link to post Share on other sites
jrock Report post Posted April 13, 2017 Unfortunately my genny isn't on a slider Share this post Link to post Share on other sites
manholt Report post Posted April 13, 2017 John. Are you side mount on a 40 footer? Share this post Link to post Share on other sites
jrock Report post Posted April 14, 2017 It's mounted right in the nose between the frame rails Share this post Link to post Share on other sites
manholt Report post Posted April 14, 2017 How do you get to it? That's insane! Share this post Link to post Share on other sites
jrock Report post Posted April 14, 2017 There is a big cover in the front open so you can check fluids.You can get at it to service it have access to front can get to Back from underback but to get in the sides I guess you would have to drop it out. Could probably use a transmission jack looks like it wouldn't be to bad. I'll see if I can figure out how to insert pix tomorrow. Share this post Link to post Share on other sites
jrock Report post Posted April 14, 2017 Carl if I did it right here are the pictures of my generator access Share this post Link to post Share on other sites
hermanmullins Report post Posted April 14, 2017 John, A quick solution, go to an Onan Service Center and have them do your maintenance. Herman Share this post Link to post Share on other sites
jrock Report post Posted April 15, 2017 Herman it's really not to hard to get to filters I was just concerned about unleashing the geni when I removed the line from the tank to the fuel filter. As long as I can still do it I will. I don't mind crawling under to do simple maintnance. I will save my moneys for the complicated stuff that I need the pros for. I am retired and enjoy doing any maintnance on my vehicles that I can do. Share this post Link to post Share on other sites
hermanmullins Report post Posted April 15, 2017 Understand, I'm the same way. Is the fuel line into the generator possibly a flexible one? If so you might clamp it some way to close off the fuel long enough to change your filter. Herman Share this post Link to post Share on other sites
jrock Report post Posted April 15, 2017 Herman that's a good idea It is a rubber line going in and I did think of that. I will install a shutoff valve when I do it. DW was calling had to drop it for now that's the good thing about retirement if you don't get it today there's always tomorrow. Share this post Link to post Share on other sites
manholt Report post Posted April 15, 2017 I feel for you. I had better access on my old side mounted (in a bay) gas generators. Not seen one in front before, that was not on a slide! Geez. Shut off valve would help.. Share this post Link to post Share on other sites
wildebill308 Report post Posted April 15, 2017 My generator is in the front with no slide. Not a problem till you need to pull the side cover to change the belt. Bill Share this post Link to post Share on other sites
dickandlois Report post Posted April 16, 2017 The item I have run into is that many of the shops do not like to do repair work on them, due to the fact that they need the drop the generators out the bottom to service them. So check with the Onan shops to see if they are equipped to do the job. Rich Share this post Link to post Share on other sites
jrock Report post Posted April 17, 2017 I would be afraid to even ask what it would cost to have Cummins work on it. I think I would just get a transmission jack and drop it myself and if I can't repair take the unit over to them. Share this post Link to post Share on other sites
dickandlois Report post Posted April 17, 2017 4 hours ago, jrock said: I would be afraid to even ask what it would cost to have Cummins work on it. I think I would just get a transmission jack and drop it myself and if I can't repair take the unit over to them. John, You might look at a pallet jack as an option to lower the genset. Share this post Link to post Share on other sites
hermanmullins Report post Posted April 17, 2017 Let me get this straight, I am going to have to raise the front end of an approx. 35,000 lb coach a minimum of 36" off the ground. Support it some how so that I might safely release all the bolts and electrical connections then lower a 300 to 500 lb generator to the ground with some sort of make shift lift or jack, then repeat the process to save a few hundred bucks. H'mmm Sorry, just not for me. Please be safe and let the trained people with the right equipment do the dangerous jobs. Herman Share this post Link to post Share on other sites
