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Old 09-21-2018, 08:57 PM   #1
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Oil Filter for Generator

Anybody know what the number is for the oil filter on the 8HDKAK generator. I'm getting conflicting information on Google.
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Old 09-22-2018, 05:43 AM   #2
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Anybody know what the number is for the oil filter on the 8HDKAK generator. I'm getting conflicting information on Google.
Part# 0122-0833

you can buy them on amazon. just looked 16.45
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Old 09-22-2018, 10:02 AM   #3
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When I did the change on my 8kw Oman with a Kubota. Engine, the oem filter from the factory is not the filter you should use from then on. They use a smaller filter on the first one probably as the fist chance is at 50 hrs. I got mine directly from Cummins.
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Old 09-23-2018, 07:49 AM   #4
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Walmart........ I used a K&N HP-1010
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Old 09-23-2018, 12:36 PM   #5
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Originally Posted by mikew968 View Post
When I did the change on my 8kw Oman with a Kubota. Engine, the oem filter from the factory is not the filter you should use from then on. They use a smaller filter on the first one probably as the fist chance is at 50 hrs. I got mine directly from Cummins.
I've always used the 0833 filter, the manual lists it as the part # and I just re-read the section on oil change recommendations and didn't see anything about going to a different filter. I guess a call to an Onan Service Center is in order, generator is way to expensive to gamble on the wrong oil filter.
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Old 09-23-2018, 03:43 PM   #6
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Not subjecting you have the wrong just stating the first original oem filter is smaller than the recommended filter
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Old 09-23-2018, 04:57 PM   #7
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The 0833 part number is correct. Using any other filter is not a good idea. You may save a dollar or two in the filter purchase price HOWEVER the 0833 from Cummins is the factory recommended filter. All oil filters are not the same. I attended diesel school years ago and one of the instructors showed us the difference between factory filters and after-market filters for several different engine types. The differences can be dramatic...a couple of dollars in the purchase price of a Wal-Mart filter is insignificant compared to an oil failure due to the wrong filter. Buy the factory filters...always.
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Old 10-01-2018, 06:09 PM   #8
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K&N filters are top of the line. So are Wix.
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Old 10-01-2018, 10:31 PM   #9
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Originally Posted by mikew968 View Post
When I did the change on my 8kw Oman with a Kubota. Engine, the oem filter from the factory is not the filter you should use from then on. They use a smaller filter on the first one probably as the fist chance is at 50 hrs. I got mine directly from Cummins.
^^This^^

I did my 50 hour oil change a few weeks ago. I ordered the genuine Onan 122-0833 filter and when I pulled the original one out, it was significantly smaller that what I had ordered as a replacement. After some paniced googling, it turns out that Onan has superseded the original (small) filter to the larger 0833 filter.

Onan 122-0833 _is_ correct and despite whatever you might remove from your generator, rest assured that the 0833 _will_ fit. You cannot even buy the older smaller one any longer.
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Old 10-01-2018, 10:41 PM   #10
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The other “fun” one is the fuel filter. If you look it up in the Onan parts catalog by model number (and I got the model number right off the side of the generator in our Isata 5) it will say that the “bolt in” filter like this one is correct:

https://www.amazon.com/Cummins-Onan-...P7AFT783238X8S

However, that is NOT what is in our generator. I can say, for fact, that our generator has this fuel filter:

https://www.amazon.com/Cummins-Onan-...words=147-0860

The Cummin/Onan manual that came with our Dynamax manual “suitcase” suggests that it could be either, but doesn’t specify how to determine which one it is. It appears that is takes a visual inspection to positively ID which one you have.
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Old 10-04-2018, 04:25 PM   #11
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Camping world carries the genuine Onan filters also and the onan oil. The oil is a little bit more, but the pour spout fits directly into the fill tube on the generator, so an easy fill.
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Old 10-14-2018, 05:30 PM   #12
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I just changed the engine oil in my DX3 & decided I should also do the generator (Onan 8KW diesel) oil filter. I tried to open the lower access panel per the owners manual but one edge of the panel was sitting on the generator support frame & then the way the support frame is made on the DX3, the access panel would only drop down approx. 2" before it hit the channel iron support frame. I wound up removing the generator side panel to get access to the oil filter. In reality this was probably easier overall then trying to work thru the small access opening. Some tasks in RVs are just painful!
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Old 10-14-2018, 05:34 PM   #13
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Even though I could get access through the drop down door I ended up doing what you did because it was such a pain trying to get the oil filter wrench on the filter through the small opening.
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