Onan generator 7500 need stator and rotor
Hi, I need to replace the stator and rotor in my HDKAJ 7500 gen set. I took it out and found that the rotor has lost 2 magnets. The stator is also damaged and cannot be repaired, in my area anyway. ...
Forum Discussion
New to this site. first post:
I run my RV generator as we go down the road in hot weather. 3k hours, 12 years old. It suddenly stalled. researched the forums and concluded It had thrown off one or more magnets and jammed up the rotor/stator assembly. no fault codes. But,the Generator engine starts, runs and after the normal 30-60 seconds, tries to load up and generate A/C, but just lugs down and acts as if the rotor is stuck. Engine doesn't stop/shut down. I don't let it run long under that "loaded/lugging condition b4 I shut it off. still no codes flashing.
Inspection determines that the fan/rotor rotates smoothly, both directions, so probably not a "thrown magnet". The Inverter output has one of the two (L1/L2) wires fried, as in it looks like a cutting torch cut thru -- thus, no electrical connection for that leg. Terminal block damaged, replacement ordered.
Question: Can this condition in effect cause the generator/rotor to effectively lock up? Is there some sort of "clutch" that allows the generator to seize/lockup w/o stalling the engine? Is this the function of the governor? Isn't the rotor a direct drive off of the crank shaft? Have not determined if the rotor/fan is actually rotating when this happens, but it seems like it must be if the engine doesn't stall. If I assumed that it is rotating, why would it lug down like it's got a big load on it. when i get a new terminal block, I plan to start it and measure voltage at that point and verify rotor/fan actually rotating. can a failed Inverter (electronic control board) cause these symptoms? Thoughts/advice please?
[url]http://jonsguide.org/best-whole-house-generators/#generac-5871-guarding-series-power-generator
I run my RV generator as we go down the road in hot weather. 3k hours, 12 years old. It suddenly stalled. researched the forums and concluded It had thrown off one or more magnets and jammed up the rotor/stator assembly. no fault codes. But,the Generator engine starts, runs and after the normal 30-60 seconds, tries to load up and generate A/C, but just lugs down and acts as if the rotor is stuck. Engine doesn't stop/shut down. I don't let it run long under that "loaded/lugging condition b4 I shut it off. still no codes flashing.
Inspection determines that the fan/rotor rotates smoothly, both directions, so probably not a "thrown magnet". The Inverter output has one of the two (L1/L2) wires fried, as in it looks like a cutting torch cut thru -- thus, no electrical connection for that leg. Terminal block damaged, replacement ordered.
Question: Can this condition in effect cause the generator/rotor to effectively lock up? Is there some sort of "clutch" that allows the generator to seize/lockup w/o stalling the engine? Is this the function of the governor? Isn't the rotor a direct drive off of the crank shaft? Have not determined if the rotor/fan is actually rotating when this happens, but it seems like it must be if the engine doesn't stall. If I assumed that it is rotating, why would it lug down like it's got a big load on it. when i get a new terminal block, I plan to start it and measure voltage at that point and verify rotor/fan actually rotating. can a failed Inverter (electronic control board) cause these symptoms? Thoughts/advice please?
[url]http://jonsguide.org/best-whole-house-generators/#generac-5871-guarding-series-power-generator
