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07-28-2015, 05:43 PM
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#1
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Senior Member
Winnebago Owners Club
Join Date: Sep 2014
Posts: 225
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Generator (how long to exercise )
Hey, I am sure that this has been discussed before, I was checking the op Manuel and it is some what confusing . How long do you exercise the Oman generator and under what load. OP Manuel says two hours at least once a month under 1/2 rated power. Dealer said 1Hr a month while A C is on. I assume one should go by Manuel . Just seems like a long time (2 Hrs ? )
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07-28-2015, 05:48 PM
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#2
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Senior Member
Thor Owners Club Freightliner Owners Club
Join Date: Jul 2014
Posts: 352
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I run mine 1 hour every 2-3 weeks under max load (2 ac's) then under no load for 5-10 minutes for cool down. my 2 cents.
__________________
2018 Thor Aria 3901
Toad: 2022 GMC Canyon CC LB
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07-28-2015, 05:48 PM
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#3
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,751
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I usually run mine for an hour. Two AC's, or two heatpumps, depending on weather.
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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07-28-2015, 05:50 PM
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#4
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Senior Member
Join Date: May 2014
Posts: 797
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I run about 2 hrs, more or less, with two air conditioners on. probably not right on schedule but at least every other month.
__________________
2004 Holiday Rambler Endeavor DST,07Chevy Colorado
Jefferson City, Missouri
Navy Viet Nam vet 67/71 USS Decatur DDG 31
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07-28-2015, 05:56 PM
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#5
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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I think the two hour time under a moderate load (two A/C's) is to allow the gen to get up to and maintain full operating temperature to remove any condensation that could accumulate in the engine and alternator.
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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07-28-2015, 08:14 PM
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#6
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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Quote:
Originally Posted by Crasher
I think the two hour time under a moderate load (two A/C's) is to allow the gen to get up to and maintain full operating temperature to remove any condensation that could accumulate in the engine and alternator.
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That is my understanding also. It takes time and operating temperature to evaporate all moisture from oil.
A side note to this subject;
My 3,000W portable genset gets an oil change every spring. Last oil change the last remnants of oil was a milky light brown color = water-in-oil, and it is stored indoors.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-28-2015, 08:25 PM
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#7
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Senior Member
Winnebago Owners Club
Join Date: Sep 2014
Posts: 225
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Thanks, didn't know to run for 10 -15 mins with no load at end. Makes sense!
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07-29-2015, 07:32 AM
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#8
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Alberta
Posts: 1,429
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Quote:
Originally Posted by WV Bum
Thanks, didn't know to run for 10 -15 mins with no load at end. Makes sense!
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I think 5 minutes to cool down with no load would be more than adequate.
__________________
Trap, Jan and the Pup
2013 Monaco Diplomat 43dft
2010 Black Jeep Liberty
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07-29-2015, 08:48 AM
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#9
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,794
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Quote:
Originally Posted by WV Bum
Hey, I am sure that this has been discussed before, I was checking the op Manuel and it is some what confusing . How long do you exercise the Oman generator and under what load. OP Manuel says two hours at least once a month under 1/2 rated power. Dealer said 1Hr a month while A C is on. I assume one should go by Manuel . Just seems like a long time (2 Hrs ? )
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I think Onan recommends at least 1 hour per month but I usually only run it for 30 minutes with both A/C's and the fridge on!
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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07-29-2015, 09:38 PM
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#10
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Senior Member
Outdoors RV Owners Club
Join Date: Oct 2009
Location: Manitoba,Canada
Posts: 2,789
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As we travel, we usually park for the night each night somewhere with no services. The generator runs about an hour to charge the batteries before bedtime. My wife and I both use CPAPs. The generator usually runs about an hour and a half in the morning to charge the batteries before we start out again to travel for the day. That's each and every day.
If we park with full services for an extended time, I usually disconnect from services after a couple of weeks, wait a day and then run the generator for a couple of hours to charge the batteries up again. Then I connect to services again.
When I disconnect the load from the generator, I usually let it run with no load for five minutes or so.
We bought our coach in 2008. We had a lot of generator trouble for the first two or three years. I think it was because the previous owner didn't use the generator much, and the propane system was all gunked up. With the amount we use the generator, it continually runs like a champ!
Jim
__________________
2016 Creekside 23RKS
2012 Ram 2500 Laramie 4X4 Cummins 6.7L
Canada, eh?
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07-29-2015, 09:51 PM
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#11
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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Humidity in the gen set is it's enemy . If you live in an area of high humidity , or park on dirt. The maintenance becomes doubly important.
I try to run my gen set after trips when I've driven in the rain, but not always possible if I'm pulling into a park when it's still raining.
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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08-01-2015, 04:40 AM
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#12
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Senior Member
Join Date: Mar 2012
Posts: 206
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Quote:
Originally Posted by Ray,IN
That is my understanding also. It takes time and operating temperature to evaporate all moisture from oil.
A side note to this subject;
My 3,000W portable genset gets an oil change every spring. Last oil change the last remnants of oil was a milky light brown color = water-in-oil, and it is stored indoors.
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One NEEDS to get all the moisture out of the alternator too. That takes more time, and the reason for at least 1/2 load. Takes longer than it would if you just had the engine. Over time, that moisture will corrode things in the generator if left in there.
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08-01-2015, 06:16 PM
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#13
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Registered User
Join Date: Nov 2010
Location: Austin, Texas
Posts: 413
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My owners manual for my 10k Onan says 2 hours per month under a load. I always exercise mine as recommended.
Hhg
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08-01-2015, 08:32 PM
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#14
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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I do one hour a month with one air conditioner. Unless have camped with using the genny.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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