Onan 7500 HDKA getting code 36
Hello, Writing to see if anyone has this issue and solution. My generator run great! When it runs. The problem I am having is it shuts down after about 1 hour of driving. It will shut down after ...
Forum Discussion
Freighguy,
First off, may I ask what you've determined what "code 36" is? I've not heard of it. I, and many others on here who also own the 7.5QD model diesel gens have experienced the code "33" but, not a code 36. Code 33 on most is an "over heat" condition. And, the cause, or list of causes for the code 33 are several possibilities. But, I don't have my Onan trouble shooting book here in front of me to determine what a code 36 is.
Now, it does sound like your fuel tank is not venting properly. If you are sure it's "vacuum" and not pressure, which, would be not good in either case, than some investigation into the cause of that is warranted. And, no, movement of the fuel in the tank causes no pressure/vacuum differences while driving. Besides, while driving your engine is using fuel too and, if you were experiencing a vacuum build up in the tank, I'd suspect that your engine would eventually shut down too due to the transfer pump not being able to over come the vacuum. But this is all speculation.
So, if your hoses are good, and your fuel pump on the gen is good, and the filter is good, the first thing I'd maybe have a look at is the fuel tank on the rig to make sure the venting system is working properly.
Scott
First off, may I ask what you've determined what "code 36" is? I've not heard of it. I, and many others on here who also own the 7.5QD model diesel gens have experienced the code "33" but, not a code 36. Code 33 on most is an "over heat" condition. And, the cause, or list of causes for the code 33 are several possibilities. But, I don't have my Onan trouble shooting book here in front of me to determine what a code 36 is.
Now, it does sound like your fuel tank is not venting properly. If you are sure it's "vacuum" and not pressure, which, would be not good in either case, than some investigation into the cause of that is warranted. And, no, movement of the fuel in the tank causes no pressure/vacuum differences while driving. Besides, while driving your engine is using fuel too and, if you were experiencing a vacuum build up in the tank, I'd suspect that your engine would eventually shut down too due to the transfer pump not being able to over come the vacuum. But this is all speculation.
So, if your hoses are good, and your fuel pump on the gen is good, and the filter is good, the first thing I'd maybe have a look at is the fuel tank on the rig to make sure the venting system is working properly.
Scott
