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MoPor
Samba Member
Joined: December 03, 2010
Posts: 292
Location: Canada
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 Posted: Sat Jul 14, 2018 1:58 pm Post subject: oddly worn pulley hub bore |
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There was an erratic squeaking at idle. I pulled the generator and fan assembly off and when putting everything back together I found the worn hub. I thought maybe the screws behind the fan came loose again. Anybody seen this before? It looks like an electrical issue perhaps.
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Matt
'58 356A coupe
'00 Boxster S |
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60ragtop
Bonneville Belt Bitch
Joined: March 13, 2006
Posts: 7800
Location: Big Wonderful WYO 82401
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| Posted: Sat Jul 14, 2018 2:58 pm Post subject: Re: oddly worn pulley hub bore |
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looks like a poor aftermarket quality pulley.
screws came loose again ?
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Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986
| tasb wrote: |
I've restored a large number too, but I don't toot my horn quite as loud.
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| sb001 wrote: |
maybe he just snapped cause his car sucked  |
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MoPor
Samba Member
Joined: December 03, 2010
Posts: 292
Location: Canada
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| Posted: Sat Jul 14, 2018 4:28 pm Post subject: Re: oddly worn pulley hub bore |
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no screws were tight. The pulley probably came from Stoddard. I doubt it has 1000 miles on it.
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Matt
'58 356A coupe
'00 Boxster S |
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60ragtop
Bonneville Belt Bitch
Joined: March 13, 2006
Posts: 7800
Location: Big Wonderful WYO 82401
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| Posted: Sat Jul 14, 2018 6:19 pm Post subject: Re: oddly worn pulley hub bore |
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I would guess the hub and pulley ended up with some play in them somehow and allowed it to crack then grenade. If you order another make sure there is no slop in the hub and inner pulley.
_________________
Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986
| tasb wrote: |
I've restored a large number too, but I don't toot my horn quite as loud.
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| sb001 wrote: |
| maybe he just snapped cause his car sucked |
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kneeslider
Samba Member
Joined: March 23, 2016
Posts: 3
Location: UK
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| Posted: Sat Jul 21, 2018 2:46 pm Post subject: Re: oddly worn pulley hub bore |
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This happens when there are an insufficient number of adjustment shims in the stack.
You need a total of 10 shims fitted to the pulley area, or the big nut will not tighten down and clamp the pulley properly. My betting is that you have less than 10.
With a little play available, the belt will hammer the pulley halves against the flats on the hub till this happens, and eventually the pulley breaks in half.
Have a look at the other pulley half and check for wear, and matching wear patterns on the hub. If in doubt, replace all three bits and buy enough shims to make a total of 10 |
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MoPor
Samba Member
Joined: December 03, 2010
Posts: 292
Location: Canada
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| Posted: Sat Jul 21, 2018 7:53 pm Post subject: Re: oddly worn pulley hub bore |
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I've got 10 shims. The outer pulley half is in good shape.
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Matt
'58 356A coupe
'00 Boxster S |
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