Metalcutter
Illinois
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Joined: 03/03/2008
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Hello all
I took a voltage check on outlets in my Rv and here is what I got.
130-135 No Load.
125-130 With one air on.
150 When I kick the air off.
Is this normal and /or acceptable ?
Should I be concerned? If so what should I do ?
Also how can I check to see if my generator is idleing too high?
Thanks again
Metal
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dougrainer
Carrolton
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Joined: 06/11/2007
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NO, the high of 150 is NOT acceptable. The other voltages are right at spec for your model. The governor is what regulates the run speed (1800 RPM's). The idle adjustment on your model does NOT regulate the running RPM speed or the voltage. If you are using a quality Volt meter, (not a plug in needle type) then you need the unit checked out by a qualified Onan tech. That high (150) volatge can damage your other appliances. Doug
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Generator Jim
Conway, SC
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Joined: 07/16/2005
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Metal
Post the complete model number and we can help much more. It sounds like a speed problem but it could be a blown diode in an early spec, or a shorted regulator in a later spec. There is also the possibility of a rotor or stator problem.
The model and spec number will tell the tale.
JimL
Jim & Jane Latour
08 Chevy 3500HD, crew cab, dually, Duramax/Allison
05 Wilderness Advantage AX6 365 BSQS, Onan 3.6KY
Retired AF CMS (E9) Power Generation and Onan RV genset Level III tech
Grand Strand Sams
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Metalcutter
Illinois
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Not sure exactly what you need so here goes.
6.5 NHE-1R/26100C
S/N 1870934895
V=120
PF=1.
AMPS=54.2
HZ=60
RPM=1800
BAT 12
If this is not complete let me know and I will look some more.
I maybe should also clearify the 150v spike only lasts for 2-3 seconds
then its back to 130-135v.
Thanks again
Metal
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Generator Jim
Conway, SC
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Joined: 07/16/2005
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Metal
Your Sept 87 unit seems to have a governor problem. It could be attributed to one or more problems.
1. Basic governor setting is too high.
2. Too much sensitivity in the governor linkage.
3. Binding governor rod that won't allow the governor to bring the unit back to the on-speed setting.
4. Very dirty/varnished oil that is gumming up the governor dish and ball assembly mounted on the front of the camshaft.
5. Maladjusted engine idle speed setting.
To check the speed, get a multimeter that has a Hz function on it and connect it between generator ground and one of the circuit breaker outputs. At no load the meter should read 61.5 +- .5, at full load it should read 58.5 +- .5 Hz.
To adjust the speed setting loosen and adjust on the two (3/8" wrench) lock nuts and threaded shaft inside the square hole in the black top cover on the engine. Use WD40 on the shaft and nuts as this is an old unit and it may be rusty.
The voltage adjusting system was usually set slightly low at the factory due to a possible overspeed voltage problem. Do NOT adjust the transformer taps unless you have the Service/Overhaul Manual and fully understand it.
JimL
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Metalcutter
Illinois
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Thank you very much for the info.
Hopefully it will warm up a little in the next couple of days and I can try your advice. I will let you know asap on the outcome.
thanks again
Metal
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