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-   -   Omitting/deleting accessory case gears (https://vansairforce.net/community/showthread.php?t=156874)

Toobuilder 01-14-2018 08:34 AM

Quote:

Originally Posted by vic syracuse (Post 1232092)
I'm not so sure about what is being referenced here. There are bearings for the magneto drives that are press fitted into the engine case. Those should be left out. The larger magneto drive gears can stay in the engine. It is common practice to remove a mag and place a cover on the hole when using an electronic engine. The drive gear is physically attached to the the magneto. the larger drive gears left behind in the accessory case aren't going anywhere...



What I'm saying is that items 6 and 7 above must be removed. These often stay behind when the mag is pulled, so I dont want anyone to think they are part of the accessory drivetrain. We are saying the same thing here.

Thanks Ross, for providing the above PDF on your SDS website.

Toobuilder 01-14-2018 08:37 AM

Quote:

Originally Posted by maniago (Post 1232105)
...I dunno, but you might have a diff between 540s and 360 accessory cases, as I've not ever heard of any need or recommendations for removals for the 360 with EI, so carefully qualify any answer you get.

There is a big difference. I see some people throwing 4 banger experience in here which is confusing things. This is a discusion about 540's.

flion 01-14-2018 09:21 AM

Below is a photo of my IO-540. It has the B&C alternator and an Airwolf remote oil filter adapter. Standard pad for the alternator on the vacuum pump pad. I seem to recall that my research showed it would NOT work on the hydraulic pump pad but can't point to that reference right now. To close off the magneto drives, both the gears and the adapters are gone. The long studs were replaced with short studs and toe clamps to hold the LSE-supplied covers in place. Caveat, the IO-540 clamps are different than the ones on the IO-360 in my RV-6A. I had to hunt to find the right part at a decent price. Read the parts catalog carefully; it does show the correct studs and clamps but you have to verify which accessory case you have - there are different ones. On mine, with the alternator installed, there is no way to get a tach sender on the tach drive but, as it turns out, the LSE units both put out a signal or you can use Van's sender with the 12" extension. I had 0 luck finding an extension tach cable of any length other than the one built into the Van's sender.


stringfellow 01-15-2018 02:08 PM

Quote:

Originally Posted by flion (Post 1232129)
Below is a photo of my IO-540.

Good photo, thanks. I had intended to machine some magneto pad covers that don't require that style clamp. I was going to model them after the Lycoming plastic port covers that have an O-ring groove in them.

Anyone see issue with threading coarse bolts into the stud holes in lieu of using studs? Given the bolt length is appropriate to the hole depth, of course.

What's the reason for the clamps you're using?

Toobuilder 01-15-2018 03:21 PM

Quote:

Originally Posted by stringfellow (Post 1232444)
...Anyone see issue with threading coarse bolts into the stud holes in lieu of using studs? Given the bolt length is appropriate to the hole depth, of course....

Pretty much exactly what I did. Flat plates with ears, and I even machined a dish into them to save a few grams. Studs removed and bolts installed. No issues so far.

Not the best picture, but....



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