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  #1  
Old 08-12-2018, 05:08 PM
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wjb wjb is offline
 
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Default Interference between prop governor oil line and PlanePower AL12 alternator

Hi VAFers,

I'm installing a PlanePower AL12-60 alternator on my IO-360-M1B and find that the body of the alternator contacts the prop governor oil line (aft mounted prop gov) when I install the belt over the flywheel and alternator pulleys.

It seems that it would require lots of tension to stretch the belt to the point where the clearance would be acceptable.

Is this a case of stretching out the new belt, or would a longer belt be better? I'm using the one that came in the box with the alternator (Dayco 15355; 35.5")
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  #2  
Old 08-12-2018, 05:16 PM
TS Flightlines TS Flightlines is offline
 
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Stretching a new belt might take a WHILE---so take the belt off, position the alternator, and see what length NEW belt you will need. Make sure the alternator will clear other things, like the cowling, baffles. Sometimes changing 1 accessory can create several other issues.
Tom
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  #3  
Old 08-13-2018, 08:23 PM
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Wunderon Wunderon is offline
 
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i got a dayco 15358 which I think will work. 15360 a touch big for me.
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  #4  
Old 08-13-2018, 08:49 PM
BillL BillL is offline
 
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Location: Central IL
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Default I found the same issue.

I bent the line a little closer to the case (block of wood and a hammer YMMV) and the result was a small gap (1mm) between the alternator-line-case. 40 hrs with regular inspections indicate that it is working. Thankfully, the parts don't move that much.

The 15358 belt is a good idea too.
Edit 8-15-18 - I looked at mine again. Note (below) the adjustment slot has the bolt near the end. I used the standard belt, as the adjustment range might not accommodate much extra length.

Let us know how yours works out.

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Last edited by BillL : 08-15-2018 at 06:40 AM.
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  #5  
Old 08-19-2019, 02:53 PM
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dayco 15358 too big for the adjustment arm as you suggested Bill, ended up using the supplied 15355, which grants a mm or so clearance from oil line when torqued
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  #6  
Old 08-20-2019, 06:16 AM
BillL BillL is offline
 
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Default No motion/no contact

Quote:
Originally Posted by Wunderon View Post
dayco 15358 too big for the adjustment arm as you suggested Bill, ended up using the supplied 15355, which grants a mm or so clearance from oil line when torqued
Good to hear, Dave. Mine is about that distance and repeated inspections in Phase I showed no contact of the parts. None at 80 hrs for annual either.
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  #7  
Old 08-21-2019, 01:51 PM
rapid_ascent rapid_ascent is offline
 
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Would a slightly longer belt provide more clearance?
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