Shorter Alternator Belt Needed

[RoundTwo]

Since my starter had to come out, I decided it was time for new baffles. Isn’t that the way the disease progresses?

Anyway, my alternator belt is too long and the alternator has been rubbing against the baffle and has worn through in one place. 
Does anyone have the correct belt # for an ‘88 J?

Chuck

[PT20J]

[RoundTwo]

22 minutes ago, PT20J said:

Thanks! I found the same in the Lycoming IPC. It will be interesting to see what is actually installed.

[LANCECASPER]

10 hours ago, RoundTwo said:

Thanks! I found the same in the Lycoming IPC. It will be interesting to see what is actually installed.

Sometimes a Gates automotive belt

[RoundTwo]

11 hours ago, RoundTwo said:

Thanks! I found the same in the Lycoming IPC. It will be interesting to see what is actually installed.

Looks like it’s not going to be as simple as installing the right part. 

[GeeBee]

1 hour ago, LANCECASPER said:

Sometimes a Gates automotive belt

Exactly and make sure it is a Gates. There are a lot of cheap belts out there, but nothing is made like a Gates.

[PT20J]

Mine was doing that also. The baffle presses against the mounting arm and the alternator case . We just put a bead of RTV in the places where it wants to make contact to cushion it.

[RoundTwo]

9 hours ago, PT20J said:

Mine was doing that also. The baffle presses against the mounting arm and the alternator case . We just put a bead of RTV in the places where it wants to make contact to cushion it.

It turns out the correct -376 belt was installed, so when everything goes back on, I’m going to ensure there is enough space to prevent it getting any worse and some RTV bumpers sound like a good plan.

[A64Pilot]

Often as a belt wears it gets thinner, that makes it sit further down in the pulleys and is loose of course so you have to tighter it, eventually it hits the bottom of the pulleys and has to be stupid tight or it will slip.

‘Often a new belt as it’s not worn appears shorter than a worn one.

If you go the Gates automotive route, pay extra for a green stripe, it’s their best belt and costs more, but it’s worth it.

http://www.gatesunitta.com/en/green-stripe®-v-belt