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Old 07-24-2015, 07:35 AM   #11
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edatlanta - good advice that I'll try next time! With regard to the filter wrench, neither the local PepBoys or AutoZone had the correct filter wrench size in stock (I assumed it must be a non standard size) so I had to use the above tool.
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Old 07-24-2015, 03:23 PM   #12
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AugerN, locate a Cummins dealer. They make the Onan generator, have parts and service them. I bought a filter wrench from our Cummins dealer. It is a cup that fits the filter exactly and simplifies the removal of the filter.
I like edatalanta's advice on "burping" the engine with the starter button. He's right, that last 1/2 quart goes in realllllll slow.
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Old 07-24-2015, 03:27 PM   #13
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Originally Posted by AugerN View Post
edatlanta - good advice that I'll try next time! With regard to the filter wrench, neither the local PepBoys or AutoZone had the correct filter wrench size in stock (I assumed it must be a non standard size) so I had to use the above tool.
My home base is in a very small town (not even a McDonald's), but we do have a NAPA store. They ordered it for me. I don't remember the size.
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Old 07-24-2015, 03:29 PM   #14
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Quote:
Originally Posted by D&MAKAFUN View Post
AugerN, locate a Cummins dealer. They make the Onan generator, have parts and service them. I bought a filter wrench from our Cummins dealer. It is a cup that fits the filter exactly and simplifies the removal of the filter.
I like edatalanta's advice on "burping" the engine with the starter button. He's right, that last 1/2 quart goes in realllllll slow.
Just don't forget to put the dipstick back in when burping or the burp reminds you of burping a small child and what happens frequently.

Don't ask me how I know this!
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Old 07-25-2015, 03:54 PM   #15
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HAHAHAHAHAHAHA..........Ed, thank you. It's always the little things...dotting i's and crossing t's that I miss.
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Old 08-03-2015, 03:07 PM   #16
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Just don't forget to put the dipstick back in when burping or the burp reminds you of burping a small child and what happens frequently.

Don't ask me how I know this!
Oh how I wished I had paid more attention to your post Ed! Otherwise, a very easy job.
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Old 08-23-2015, 06:36 AM   #17
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A strap wrench won't work on removing the filter?
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Old 08-23-2015, 07:35 AM   #18
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Ric, the filter is recessed in the frame work, can't get a bite on it with a strap wrench. Read from the beginning of this thread. There are several comments on how/where to obtain a cup wrench that fits exactly.
Welcome to the Precept Owners Group.
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Old 08-30-2015, 08:51 PM   #19
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Ended up have Cummins do the oil & filter change at their service center in Milwaukee. Also had them clean the spark arrestor (which is recommended in the owners manual).

Yes, I paid a lot more than if I did it myself.

Two interesting findings in my search to have this service work performed while in transit:

1. The number of RV dealers who say they don't change generator oil (along with the ones who say they can't schedule an appt because they are so backed up)
2. The Cummins tech said you should run the generator a minimum of 2 hours per month with load (a little more than our delivery walk thru told us to do).
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