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Speedy11(at)aol.com
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 Posted: Sun Apr 29, 2007 3:04 pm Post subject: Engine Lord Mounts |
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I bought the Van's Lord mount kit for my IO-390 (same dimensions as IO-360).
For anyone who's installed their engine, to what value did you torque the 7/16 engine mounting bolts?
Did you use 475 inch pounds? Did you use coarse thread torque or fine thread?
Thanks,
Stan Sutterfield
See what's free at AOL.com.
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grant.piper(at)bigpond.co
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| Posted: Sun Apr 29, 2007 3:18 pm Post subject: Engine Lord Mounts |
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Hi Stan,
You will have trouble getting a torque wrench onto these bolts, and it may be of limited use. The rubber mounts must be compressed such that the bolt is tight on the inner spacer (this limits the amount of compression). The compression of the rubber will add to your torque reading also. I've only installed a couple of enginmes, but in each case did the bolts up tight on the spacer then as required to get the cotter pins in.
regards,
Grant
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Mon Apr 30, 2007 3:11 pm Post subject: Engine Lord Mounts |
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There is a procedure that requires always torquing a nut...not a bolt. Unless the manufacturer of the plane specifies the bolt be torqued. There certainly are places where bolts need to be torqued into fittings. My Ivo prop is an example of that.
That being said; you are in fact the manufacturer of the plane.
On engine mounts I would do exactly as you said; torque (the nut) until the slack was taken out of the mount and a cotter pin could be set. Often I have used crows feet for doing this, making torque adjustments for the offset of the crows foot.
[img]cid:658395822(at)30042007-224D[/img]
Noel Loveys, RPP, AME intern
Campbellton, Newfoundland,
Canada
Kitfox Mod III-A, 582, B box, Ivo IFA
Aerocet 1100s
noelloveys(at)yahoo.ca (noelloveys(at)yahoo.ca)
Do not archive
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Noel Loveys
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Speedy11(at)aol.com
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| Posted: Mon Apr 30, 2007 4:46 pm Post subject: Engine Lord Mounts |
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Grant,
Thanks for your reply,
I'm torquing the engine bolts by torquing the bolt head - since I can't get to the nut. It's the only way I can figure to torque them. The rubbers are compressed and the spacers seated. I just want to make sure I'm torquing the correct amount.
Mahlon, any comment on this?
Stan
[quote]Hi Stan,
You will have trouble getting a torque wrench onto these bolts, and it
may be of limited use. The rubber mounts must be compressed such that
the bolt is tight on the inner spacer (this limits the amount of
compression). The compression of the rubber will add to your torque
reading also. I've only installed a couple of enginmes, but in each
case did the bolts up tight on the spacer then as required to get the
cotter pins in.
regards,
Grant
---
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Jim Baker
Joined: 30 Mar 2006
Posts: 181
Location: Sayre, PA
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| Posted: Mon Apr 30, 2007 5:20 pm Post subject: Engine Lord Mounts |
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Ah, the luxury of cotter pins....but not on my io520. 40-42 lb ft
and no retention other than torque.......
I think mine were 1/2, works out to 550-600 lb in. 7/16 would be
400-450 lb in. The internal spacers will limit compression. No oil
on threads for torque....
| Quote: | For anyone who's installed their engine, to what value did you torque
the 7/16 engine mounting bolts?
Did you use 475 inch pounds? Did you use coarse thread torque or fine
thread?
|
Jim Baker
580.788.2779
Elmore City, OK
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