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Old 01-31-2023, 10:33 AM   #1
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Generator Oil Change - ISATA5

Noticed this issue on an older post re: Generator Oil Change - Europa.
Our access door used to open on our ISATA 5 28SS. But, sure enough there has been some shifting and not so much access anymore. I was more concerned with the root cause behind a shifting 420 lbs generator. IMHO, not much shoulder for the 4 bolts to clamp on to the frame. Found some bolts looser than 20 ft lbs of torque (Onan spec calls for 31 ft lbs of torque). So, I added 3/8' washers with a 1" external diameter as shown in third picture, plus some thread locker and torqued to spec.
Coaxing that generator into position was the hardest part. With only one bolt out at a time, I used my jeep's jack and a large plate under the generator's center of gravity (as shown in Onan's Install document). Still needed a large C-clamp and some wood blocks to move the generator into alignment.
Cheers,
SParkie

Problem (notice the bolt shoulder v frame slot = not so much)
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Solution (notice the C-clamp and wood blocks)
Click image for larger version

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Result (aligned door and larger washers)
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ID:	283469
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Old 01-31-2023, 12:21 PM   #2
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I'll note this to production/engineering.
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Old 01-31-2023, 12:37 PM   #3
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Thanks for the acknowledgement.

Our rig has 13K miles on it at the one year mark and I'm sure that had something to do with it ! Many more Nationl Parks on the to do list.
Cheers,
SParkie
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Old 02-02-2023, 04:17 PM   #4
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Originally Posted by bclemens View Post
I'll note this to production/engineering.
Brian, just an FYI but I had the same gotcha on my 2021 28SS. Resolved by loosening the bolts and using a transmission jack to move the generator and open access to the change port. Helluva job!
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Old 02-02-2023, 07:28 PM   #5
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I had the same issue with my 2021 28SS; unfortunately, the bolts on my unit were either over torqued, or crossed threaded, resulting in 2 shearing off and 1 with stripped threads when I tried to loosen them to reposition the generator - leaving one bolt... I was unable to get the sheared bolts out using an easy-out, leaving me with the only option to drill out the old bolts and use nuts and bolts to clamp the generator down to the frame. Definitely not a pleasant event.

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Old 02-03-2023, 02:48 PM   #6
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FYI. Assuming the front of the generator on the I 5 is as accessible as on the M2s, the easiest way to service these units is to remove the front panel. Itís a dozen or so screws and the panel pulls off. You can then service it without having to crawl under the coach. Very easy. I never mess with that door on the bottom.
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Old 02-03-2023, 03:50 PM   #7
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Originally Posted by Bill Davis View Post
FYI. Assuming the front of the generator on the I 5 is as accessible as on the M2s, the easiest way to service these units is to remove the front panel. Itís a dozen or so screws and the panel pulls off. You can then service it without having to crawl under the coach. Very easy. I never mess with that door on the bottom.
Not so much. Many of the screws are hidden or obscured by the frame making it a slow and tedious job to remove the front panel. And there are a lot of them.
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Old 02-03-2023, 04:11 PM   #8
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Not so much. Many of the screws are hidden or obscured by the frame making it a slow and tedious job to remove the front panel. And there are a lot of them.
Too bad, they are all out in the open on the M2.
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Old 02-03-2023, 06:15 PM   #9
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Not so much. Many of the screws are hidden or obscured by the frame making it a slow and tedious job to remove the front panel. And there are a lot of them.
I change my oil all the time pulling the front panel. It's easier and cleaner. All screws are easily accessible.
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Old 02-03-2023, 06:25 PM   #10
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Originally Posted by TrailWayz View Post
I change my oil all the time pulling the front panel. It's easier and cleaner. All screws are easily accessible.


Agreed. It only take a few minutes to remove the cover screws, then you can reach everything from the front, lot less mess and crawling around under the generator.
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Old 02-04-2023, 09:59 AM   #11
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Agreed. It only take a few minutes to remove the cover screws, then you can reach everything from the front, lot less mess and crawling around under the generator.
Thatís what I said.
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Old 02-04-2023, 10:20 AM   #12
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Serrated washers

Quote:
Originally Posted by SParkie View Post
Noticed this issue on an older post re: Generator Oil Change - Europa.
Our access door used to open on our ISATA 5 28SS. But, sure enough there has been some shifting and not so much access anymore. I was more concerned with the root cause behind a shifting 420 lbs generator. IMHO, not much shoulder for the 4 bolts to clamp on to the frame. Found some bolts looser than 20 ft lbs of torque (Onan spec calls for 31 ft lbs of torque). So, I added 3/8' washers with a 1" external diameter as shown in third picture, plus some thread locker and torqued to spec.
Coaxing that generator into position was the hardest part. With only one bolt out at a time, I used my jeep's jack and a large plate under the generator's center of gravity (as shown in Onan's Install document). Still needed a large C-clamp and some wood blocks to move the generator into alignment.
Cheers,
SParkie
Brian and Sparkie,
Instead of flat washers, consider the use of serrated washers or even external-tooth star washers. These will bite into the small surface area of those rails and do more to prevent lateral movement.

When I worked in the bicycle shop in the late 1950s, serrated washers were used to keep the rear axle from slipping in the slotted frame as the axle position was shifted to achieve proper chain tension. They are still in use today.
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Old 02-04-2023, 06:44 PM   #13
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Originally Posted by Bill Davis View Post
FYI. Assuming the front of the generator on the I 5 is as accessible as on the M2s, the easiest way to service these units is to remove the front panel. Itís a dozen or so screws and the panel pulls off. You can then service it without having to crawl under the coach. Very easy. I never mess with that door on the bottom.
Careful doing this. With mine the front panel and the top panel holes do not line up well, at all. Also, two of the top screws were forced in at a steep angle, because of this, they were stripped out (I'll have to see about getting this fixed). I did have to pull the front cover for the first change because the filter was installed so tight and/or without oil around the gasket, I couldn't get it off. The panel had to come off and I had to tear into the filter pretty bad to get it off (a bit of a messy job).
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