onan 7500 quiet diesel generator troubleshooting

Computer-controlled variable speed operation matches engine speed to load demand, minimizing noise level. Their generators are typically compact and relatively quiet. The 7000 watt Onan RV generators may seem like they can run everything in the RV, but you can cause it to trip safeties if you try to do too much. RVshare Respectful Community Policy Onan generators for RVs have a low oil shutoff that could be causing problems. To learn more about this code, what it means and how to fix it just continue to read our article. Steve F. RVIA Certification. You must log in or register to reply here. Also I replaced the 3 glow plugs due to the unit being extremely hard to start at first start up, would crank, crank, crank, cough, smoke, crank some more and finally start. For example, some Onan generators can run off both gasoline and liquid propane. I believe what your talking about trying to say is the fuel solenoid. These generators pull fuel from the motorhome tank through a tube. Do I have just a bad CB on the gen or is that a sign of other problems? So I was able to use my motorcycle jack, some 6\"x6\" blocks, the RV's front hydraulic leveling jacks, and a few wrenches, removed the generator from the RV and repair it out in the open. Did they tell you what that code indicated? Unfortunately the RV burnt to the ground due to an oil leak in the engine compartment, however the front portion where the generator was housed was not destroyed. Hello guys! A faulty inverter module is another possibility (expensve! These generators are some of the best on the market, and having a good generator makes camping comfortable and fun no matter where you may roam. Such use on your generator for the group ? Has to pull in for the engine to start. Know the right level of oil, because over-filling will cause the generator to shut off just as too much would. Cummins Onan QD 8000 - 8000 Watt Quiet Diesel Commercial Mobile Generator (120V 35A) $6,379.10. I removed the CB this morning, the toggle on the breaker has no resistance and has something rattling inside so I have ordered a new one, which should be here tomorrow. If this is your problem, you will find this video most helpful. Here are some of the things you can check on your own. Onan generators have a number of built-in safety features. Again, look to wiring connections. Can you post a picture and your complete model and serial number? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Yes, I want to receive promotional emails from RVshare. You must log in or register to reply here. The units that do this are the ones drawing from the gas tank. If your able to bypass the solenoid and get the engine to crank the issue is with the solenoid or the wires going to it. Please feel free to contact me with any questions. Self-diagnostic capabilities simplify troubleshooting. Theyre, Youre likely going to want an RV generator when youre. Onan provides you with fault codes to help you troubleshoot your system, but some fault codes are easier to understand than others when it comes to fixing the problem or in this case "clearing the code!" Generator Control Board: Repair: Call for price: ONAN 300-2812 REV C: 24 Volt Engine Control Card . Terms of Service All this code means is that there is an overheating problem with your generator. This video shows how the original sensor can just be left in place. The Onan Quiet Diesel 7500 generator in our 2005 Vectra stopped working and won't start. Dave M Logged MCI7 20+ Yrs Foretravel w/ISM500 WG4T CW for ever. The Onan generators three year limited warranty is when it is in the RV and only powering the RV. Please review all product specs prior to purchase." For Additional Models - Please Call Us @ 1-800-800-3317 I'm assuming there is a bad circuit board and that I'll need to take it to an Onan dealer. Trademark Office. The voltage across the 12-Volt input terminals checks out at full house battery voltage and I've removed the terminals and cleaned them. If youre tight on cash, its definitely worth it to check out all of your options. Onan generators dont have the same peak load / surge capacity as some inverter generators. Model 7.5HDKAJ11451H S/N G020388776. I installed a new breaker this morning and what do you know we have power! One solution is to check the manual. There are several pages of secondary fault codes listed. It will take you to the list of fault codes and have instructions on what they mean and how to fix them. Running for awhile then shutting off sounds like it could be the fuel filter. We already mentioned that Onan generators sometimes dont have oil filters. As for as the original problem of missing power on one leg you mention brushes wearing out, is this something that I can inspect/check on my own or will it require dealer service? If these two solutions do not help you should start troubleshooting other problems. The RV was a lemon but the generator was the best part. Does anyone know what the governor actuator does and will that prevent an engine crank? Maximize the performance and life of your generator Onan generators are known for their high quality and dependable performance. Look for the J Box that connects the generator output to the feed going to the transfer switch. . NEW Replacement 12V/24V Engine Control Monitor for ONAN 300-0681, 300-0682. Allow the generator to run for 15 minutes, to ensure that the code has cleared. Hopefully this will solve this issue. I'm a 37-years-old author, traveler, writer, blogger, and a camper. However, they dont always have excess capacity. Step #3: Check spark plugs . From the Onan Operator's Manual: First-Level Fault Codes: The genset controller provides extensive diagnostics by causing the status indicator light on the Control Switch to blink in a coded fashion. Know how to sustain, maintain and repair common issues with the generator to minimize trips to the mechanic and maximize the running life of the most important equipment in the RV aside from the car motor. The J Box if often located on the firewall above the generator or in the area. Know where you would access the carburetor if you need to clean it and where you access other points required for maintenance. I takes very little to stop it up. 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Onan is known for its standby generators. Onan generators are often powerful. This means that there is another problem with the generator. It is a simple way to communicate with the owner of the generator. Thanks for all your responses. Then you can go to www.cumminsonan.com and look up the error codes. One of the causes for this code is that the overheat sensor may be malfunctioning. Finally, many newer models of Onan diesel RV generators also have fault codes that appear on the display of the unit. Fortunately, the #33 code seems to be the standard overheat warning for all Onan generators including this model. Check the starter solenoid with an ohm meter. If your Onan generator isnt running, it may be because fuel levels are too low. Here are some of the things you can check on your own. Thanks for looking. Know how much power the generator can supply and the load everything youre running in the RV will draw. The owners manual is of no help at this point. Often, this tube is not quite long enough to pull fuel through once the tank is below tank. That's a new one on me!. For sale used Onan 7.5 Quiet Diesel generator. Well lets try this again. Find out what the warranty will be from the supplier. Gather your family and. Too many to post here. Read the post on this link and see if some of the information is close to what you have. I did see a another smaller fuse holder in the wiring behind the circuit breaker but have not checked it yet. Here's what I've tried so far: Terry, Thanks, I did remove the top cover and could not see the back side of the 12V terminal connections (to check for corrosion) due to access restictions. If the latter, then there is a problem with the generator part of the unit. http://community.fmca.com/topic/5332-onan-10hdkag-61731x-generator-has-low-voltage/. Place rag below sensor hole. Take the part you got removed and use it for size up. You are using an out of date browser. For a better experience, please enable JavaScript in your browser before proceeding. Hamiltonbobs Premium Quality Oil Pan Gasket Made for IH International. If you put an RV generator in your shed and use it as a backup power source, it will then have the two year non-RV warranty in place if it applies at all. If the unit is truly overheating, then just shut it down and let the generator cool off for a while. For example, issues that make a generator run rough could be deal with temporarily, but the long-term damage will destroy the generator. High temp code, however the coolant was cool as a cucumber when I checked it after several restarts and shutdowns. One of these is the fuel cut-off switch so you don't use all your gas running power though it would leave you stranded on the side of the road. I done it completely by myself and although it was a little time consuming (about 5 hours start to finish) I was able to successfully make the repairs and reinstall it back in the RV and fire it right up. If you take it out of the RV and use it to provide backup power for your home, the warranty is two years at most. I did find a 1/4 socket that appeard to be left in the sealed unit from the factory! 2-A bonding/ground strap between the generator frame to the chassis is VERY recommended. I suggest you call Onan (Cummins) tomorrow and talk to their tech people. Rated 5.00 out of 5. GC2-XHD-UTL Replacement: Is The Interstate GC2-XHD-UTL Good? Then check the engine oil level and look quickly for anything out of place, such as fuel or coolant leaks. You may need to use those products like WD-40, Deep Creep, and more to get those sensors unstuck. However, those are not always easy to replace and can be expensive. A rattling circuit breaker is not good. Some people do confuse the 3 blinking lights as fault code #33. Other places to look include Craigslist and your local Facebook Marketplace, both of which occasionally have Onan RV generators for sale. This sensor is very difficult to remove and replace due to its location and the fact that it is made with a soft brass housing. 7500 onan quiet diesel in a '98 American Eagle. If this is the case with your model, you can find the meaning of the code your display is showing by heading to this website or checking your Onan RV generator manual. This means that you may have to search for the Onan part number in the Cummins inventory listed on a website. But before I decided to do this myself I checked with a RV dealership and was given a ballpark price of $1000 just for labor. Or as we just explained, the device monitoring the fuel supply to the generator could be malfunctioning and shutting that supply off. This is a bit difficult to get done as first, there is a little confusion about what the blinking lights mean. Following a fault shutdown, the indicator light will repeatedly blink 1, 2 or 3 blinks at a time. RV Quiet Diesel 7500/8000 GenSet RV GenSet Dramatically Lower Noise, Vibration, Harshness (NVH) Up to 15 dB(A) Quieter Than Other RV Diesel-Powered Generators Load-Matching, Variable Speed Operation Improves Low-Load Quietness . The best way to maintain that performance is by using genuine parts. If the code still exists, the generator may be in need of further repair. remove t-stat from top of engine & remove coolant below sensor hole. Your RV may be low on gas which would interrupt the fuel supply and again, overheat your generator. Ordered all the thermostat parts from ebay, all OEM Onan parts for about $80, ordered the glow plugs from ebay as well, all OEM Onan plugs as well for what I thought was a WHOPPING price of about $150. I tested the input at the automatic transfer switch and found power coming in on leg 2 but not leg 1 with gen. running. The model generator you have should have an induction coupling for AC not the brush system. 5 years RV repair and reconstruction, Fleetwood RV Training course completion. The first place to look will be all the hoses to make sure there are no kinks, holes, and so on. Well pulled the dam thing out of the motorhome. You can avoid problems by making sure the oil tank is full. Your batteries are most likely having trouble trying to kick start the generator. The manual says low input voltage (12VDC), Genset doesn't crank, will not turnover - completely silent when I try to start it. Especially if the unit is still under warranty. It may not display this or other websites correctly. Whether youre considering a "workaction", or wa, A road trip with friends is a fun way to explore i, Another incredible year of memories, travels, and, Happy New Year! Sometimes a generator simply cannot be repaired, or cant be fixed for a reasonable price anyway. Even if that number is missing from error code lists. . Has to pull in for the engine to start. Another cause would be low oil. If you dont you could damage the inverter and create an expensive repair. There is no process to clear an error code, you just have to solve the problem and it will not display again. It may be bad and if you do not have the right tools to do this, you will need to go to an Onan-approved mechanic to get it checked. Instead, it flashes codes to indicate the problem. Privacy Policy How Far Away Should Generator Be From Camper? First, that is not a governor actuator, it is a fuel shut off solenoid. ), http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/26249506/gotomsg/26250404.cfm, Quote from: sunlovers on July 14, 2013, 09:17:35 AM, Quote from: Charles in SC on July 16, 2013, 05:22:14 PM, SimplePortal 2.3.7 2008-2023, SimplePortal. That seems to be normal for Onan generators. This code seems to be missing from the manual as well. First, that is not a governor actuator, it is a fuel shut off solenoid. It also means that an oil leak in the generator can kill it well before the unit suffers damage. When the water pump belt broke, the Onan service center installed the direct drive coupling kit. Air Filter Clogging For proper functioning of the Onan generator, the equipment demands a fair amount of airflow. After that, you will have to check the sensor. Onan Quietdiesel 7500 Caterpillar 3126E"> Allison Transmission 3000 Honda EU2000i 1992 Jeep Wrangler(Towed 4 Down) . Checking inside the housing for rodents and bugs is always a good idea, and you may also want to check that the ground wire is still firmly connected on both ends. In most cases, your Onan generator is USDA Forest Service Approved. S8M 5303 built in 1969, converted in 2000, Bus Topics ( click here for quick start! I didn't bypass the solenoid .I pulled the normal signal wire off the solenoid spade and connected momentarily an external battery to the solenoid spade. From what I understand, you were running it while you were out on the road? The reason for that omission is that the problem is an uncontrolled shutdown. Is the error code 46 indicating low input (12VDC) voltage or low output (120VAC) voltage? Make sure to try these things before paying a professional, as this could save you quite a bit of money. If none of the above solutions work and you arent great at DIY projects, it might be time to seek out a repair person. They loosen up at times and can ark or burn off the wire that was or still is connected at that point. The 7500 Quiet Diesel generator uses an Inverter/Control Board that monitors almost all your generator electronics. The inverter in the Onan 7500 relies on DC power produced by the diesel engine plus DC generator, and inadequate power there can cause the inverter to malfunction, making power that is not the 60 Hz frequency it should be. Wish I had enough picture attachment space left for a sight you do not want to see under the J Box cover. Again, look to wiring connections. -Glenn. When you do not understand the code, have a list of codes ready to help you. You will be able to leave a comment after signing in. So it didn't take me too long to decide to do some research and tear into it myself. One of these is the fuel cut-off switch so you dont use all your gas running power though it would leave you stranded on the side of the road. It displays an error code 46 which the manual says is low voltage. If you are not sure what all the fault codes mean or have lost the owners manual, etc., then click onOnan Generator fault codes. Like the parts mentioned above, used Onan RV generators can be found on eBay. ). Flashing code 29 after mobile repair tech saturated it with batterie charger hooked up to terminals on back of generatot . it takes a lot longer to prep the whole thing than it will to drill. Rich thanks so much for the help, these forums are worth real money. My generator unfortunately does not slide out on a tray so I had to get a little creative and remove from the bottom because the entire top panel has to come off the unit. If filling your tank doesnt help, be sure to check your generators oil level. They can also be picked up from junkyards where RVs have been discarded. Begin by checking the fuel level. $. That is 60 decibels of noise or less at a distance of fifty feet. Unfortunately the RV burnt to the ground due to an oil leak in the engine compartment, however the front portion where the generator was housed was not destroyed. 7500 Onan Quiet Diesel Temp sensor, thermostat, glow plug, replace/repair jeffbond001 28 subscribers Subscribe 17K views 2 years ago This is my 2004 38N Fleetwood Bounder with quiet. The intent is to ensure that the RV isnt stranded because you have no gas in the tank. Other things to try include replacing the spark plugs and filters, running carb cleaner through the system, replacing the voltage regulator slip rings, and checking the circuit breaker on the back of the unit. I agree to RVshare's privacy policy. Thats why you now see products listed as Cummins Onan or Cummins part number Onan. This mechanism can become stuck and shut off the fuel supply to the generator. Hey guys. Then, the ECM system which heats the glow plugs that help the engine to start, may not be heating those glow plugs. 7500 onan quiet diesel in a '98 American Eagle. Onan itself is known for high quality generators. On the other hand, you have to use the right oil and never use old oil to keep the generator from clogging up. You will find that if you stick your finger in the coolant that it may be barely warm. The odds are high that your RV generator is an Onan Cummins or original Onan model. With only 600 plus hrs on the Generator, I would look for loose connection issue outside the generator. Do you mean the breaker will not stay in the on position or you just do not get a voltage when its reset? These generators pull fuel from the motorhome tank through a tube. I have an onan 7500 quiet diesel generator that cranks but wont start. My generator decided not to crank the starter motor. That's why while traveling I have decided to dedicate some time to share my experiences with everyone that might be interested in traveling, camping, and RVs. I tested the input at the automatic transfer switch and found power coming in on leg 2 but not leg 1 with gen. running.

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